Brantax - engineering survey

underwater, underground
and surface investigation

Our Experience

Our company has an over 10 years’ experience in research projects and geophysical, geotechnical and topographic investigations. Permanent make investments in equipment and specialized software to be able to respond as well to the challenges arising in a market increasingly dynamic. Below we present some of the methods used in some of our project.


Electrical resistivity tomography. The investigations were conducted on the company testing site. The project was intended to test newly acquired measuring equipment by using several arrays: Wenner, Schlumberger, dipole-dipole, pole-dipole, pole-pole gradient.  The test site’s subsurface characteristics are known thus we regularly operate various tests to determine the best measurements methods applicable in different situations.

Seismic measurements using the MASW method made in Bucharest’s city centre. The measurements have been part of the geotechnical study and complemented the geological strata strata information gathered from drilling. Given the intense traffic in urban areas the measurements were conducted at night thus in order to minimise noise.

Electrical resistivity measurements using multi-electrode cables in order to obtain an electric resistivity tomography. The data obtained was used to build a resistivity section of the investigated area. The local geology was derived from interpreting the data with the help of direct information from wells crossing the section.

Downhole seismic  measurements for seismic wave velocities – Vs and Vp. These are characteristic for individual layers crossed by wells. The boreholes analysed were specially prepared in order to accommodate the instrumentation that needed to be lower down. The data gathered has helped to calculate the geotechnical parameters of the specific rocks that were intercepted.

Electrical resistivity and induced polarization (IP) in multi-electrode mode for mineral deposits surveying.

 

High precision surveying and monitoring for industrial construction site. The scope of the work was to check and calibrate the production equipment. The accuracy required by the client demanded high precision equipment and techniques.

Seismic survey using the MASW method in the Beibugeac lake perimeter. The measurements were done for a research project.

 

Hydrogeological study conducted in order to characterize the natural hydrogeological conditions at Lake Beibugeac. The design of standpipes drilling was based on the geophysical investigations carried out in a previous stage.

Hidrogeologic Beibugeac-1 Hidrogeologic Beibugeac-2 Hidrogeologic Beibugeac-3 Hidrogeologic Beibugeac-4 Hidrogeologic Beibugeac-5

 

DC electrical resistivity survey using a Wenner array for determining the characteristic resistivity of the underlying rock on the grounds of a electrical power transformer station.

 

Electromagnetic (EM) site investigations on a several locations for highlighting buried utilities. The end result is a detailed map based on the gathered data.

 

Electromagnetic utilitati ingropate_23Electromagnetic utilitati ingropate_1Electromagnetic utilitati ingropate_2Electromagnetic utilitati ingropate_3Electromagnetic utilitati ingropate_4Electromagnetic utilitati ingropate_5Electromagnetic utilitati ingropate_6Electromagnetic utilitati ingropate_7Electromagnetic utilitati ingropate_8Electromagnetic utilitati ingropate_9Electromagnetic utilitati ingropate_10Electromagnetic utilitati ingropate_11Electromagnetic utilitati ingropate_12Electromagnetic utilitati ingropate_13Electromagnetic utilitati ingropate_14Electromagnetic utilitati ingropate_15Electromagnetic utilitati ingropate_16Electromagnetic utilitati ingropate_17Electromagnetic utilitati ingropate_18Electromagnetic utilitati ingropate_20Electromagnetic utilitati ingropate_21Electromagnetic utilitati ingropate_22Electromagnetic utilitati ingropate_23

 

Bathymetric survey carried out in order to map the mooring area in the port of Constanta at the Black Sea. The bathymetry maps obtained have highlighted areas that require dredging work.

 

Geotechnical and geophysical study to establish the local geotechnical parameters on a site located near the town of Calarasi. The local development projects proposals were based on the results.

 

Vertical Electrical Sounding (VES) using a Schlumberger array configuration. The investigation was intended to locate mineral water aquifers and to identify the best positioning for drilling.

 

Aerial photography using a small aircraft. The acquired images were made into orthophoto plans and 3D models of the earth surface (DSM) for the area overflown.

 

Magnetic survey for total magnetic field map and vertical gradient variation for a project aiming to highlight useful mineral deposits. Based on the magnetic maps, we managed to design the most efficient configuration for electrical resistivity and IP surveys.

 

Beibugeac_Topografie_1Topographic survey and geophysical investigations as part of a larger study for local hydrogeological conditions of the Lake Beibugeac, Tulcea County, Romania. In this project we have made several electrical resistivity tomography profiles. Aerial photographs and panoramas were also added to the scope of the work.

 

Aerial photography_industrial_1Aerial photography taken with a aerial drone of an industrial complex.  The aerial images were captured at an altitude of 200 m from several angles so that the client could have an overview of the entire site. Aerial filming was carried out as well for an overall informative purpose.

 

Canal Dunare_topografie_1Electrical resistivity survey conducted as part of geotechnical project aimed at determining the risk of landslides on the banks of the Danube – Black Sea canal. The data was correlated with well information. For a full picture, topography and bathymetry surveys were conducted as well.

 

Braila_Topografie_1Topographic survey for determining the accuracy of the set-up for the slipways for heavy ships at a shipyard.

 

Aerial photography_Orthophoto_2Aerial photography to support geophysical exploration works. Using aerial photography with ground control points the digital terrain model (DTM) and a local situation plan was built. The data was used to locate the geophysical works spatially and add the topographic element to electrical resistivity sections.

 

Petrobrazi_electromagnetic_1Electromagnetic (EM) surveys for detection of electrical networks, pipelines and buried utilities. Due to the high density networks and buried metal objects, two methods of investigation were used: electromagnetic time domain and electromagnetic induction. Less sophisticated metal detector were used to map very shallow objects.

 

Aerial photography_drone_6In early 2014, Brantax bought the first drone – a quad-copter, able to perform high altitude aerial photography (up to 2000 m). The drone is intended to be used for support in surveying work – general plans, digital terrain modelling (DTM DEN DSM) , general cadastre, land farming, etc. – as well as for infrastructure projects, communication ways, transport, electricity and real estate.

 

Giurgiu_Batimetrie_1Geophysical investigations, topographical surveys and geotechnical studies were carried out for feasibility studies on the opportunity of building grain warehouses on the Danube.

 

Prahova_Geoelectric_2Geophysical investigations achieved using electrical resistivity in a multi-electrode array for determining the slip plane at a number of locations situated in Prahova County, Romania.  For positioning in space of of the resistivity profiles and apply topographic corrections we used GPS RTK. The resulting data was then correlated with the hydro-geological information obtained from drilling.

Prahova_sectiune geoelectrica_1 Prahova_sectiune geoelectrica_2 Prahova_sectiune geoelectrica_3 Prahova_sectiune geoelectrica_4

 

Braila_Batimetrie_4Topographic and bathymetry surveys was carried out in order ​​to update the situation of slipways for heavy ships in the shipyard in Braila on the Danube river. Due to strong currents silt in regularly deposited in high rates that clog the slipways.  The survey data was used to build a bathymetry map and several cross and longitudinal sections.

 

IMG_2151Ground Penetrating Radar (GPR): verify and analyze the sequence of asphalt layers on Timisoara-Arad highway. Since the depth of investigation was followed up to 30 cm was used 2 GHz antenna capable of displaying at a very high resolution sequence of asphalt layers.

 

IMG_7618Geophysical studies to determine the local geological conditions using resistivity tomography and seismic refraction. The survey results were correlated with direct geologic information from drilling and outcrops. The investigation results were used for the comparative analysis of the two methods used.

 

IMG_7628Topo-bathymetric surveys for determining the local topographic conditions near the pumping station Facaeni. Rugged topography of the land and land under water required to pay particular attention to detail, especially in the central area which presented a disorderly accumulation of boulders. The work serves as support for the design work to stabilize shores and pumping system.

 

IMG_7243Geophysical investigations in Retezat in using DC geoelectrical methods – electrical tomography.  Measurements were performed in a research project of permafrost bodies conducted by University of Geography, Bucharest. Since the profiles were positioned on scree areas, achieving good electrical snorting was the main challenge.  The results of these investigations will be analyzed and correlated with other information by members of the research team from the University of Bucharest.

 

UXO_C3Geophysical investigations for detection of unexploded ordinance in a development project of a photovoltaic park.  Considering that the land is located near a former airfield used in the World War II, there was chances that the land has been bombed.  Following geophysical investigations were found unexploded ordnance locations and thus were removed eminent dangers of uncontrolled explosion. Ammunition was lifted by qualified personnel belonging to ISU Prahova.
DSCN2020 DSCN2009 DSCN2016 DSCN2035 DSCN2039

 

BTX_event_evenimente_5Participation in the International Fair for Renewable Energy and Energy Efficiency in Buildings, RoEnergy South-East Europe Bucharest 2013, third edition placed in the Romaero Baneasa. This event is characterized as: “the most important renewable energy fair in Romania, companies  are from solar photovoltaic, bioenergy (biomass, biofuels, biogas), wind energy, hydropower, energy infrastructure, energy efficiency in buildings.” http://bucuresti.roenergy.eu

BTX_event_evenimente_4 BTX_event_evenimente_3 BTX_event_evenimente_2 BTX_event_evenimente_1

 

94_electromagnetic-geophysic-geofizica_16Geophysical scanning through electromagnetic methods in time domain for the detection of buried metal objects in order to start construction work at two photovoltaic parks near Brasov city. Following the scan performed was detected and located a network of oil pipelines belonging CONPET Company. This network does not appear on the original map and thus managed to avoid possible problems that may occur during construction or operation period of the solar park.

 

93_bathymetry_batimetrie_24Resistivity tomography was carried out to establish local geological and hydro-geological conditions in the vicinity of the berth port of Oltenia. We have executed several resistivity profiles, both on land and water. In some locations the results were clear and interpretable, but there were locations where the electrical signal was strongly disturbed by buried utilities or above water, rails, electric rates and barge docked. The results helped to complete the picture of  the local geological structure.

 

94_electromagnetic-geophysic-geofizica_14Unexploded ordnance (UXO) investigations were carried out previously to developing a new photo-voltaic energy park near the city of Ploiesti – a heavy bombarded are during WW2. We conducted a four-channel electromagnetic scan and than we mapped to locations of possible unexploded ordnance. Following decontamination there were five unexploded ordnance of caliber 105 mm and numerous other fragments extracted from the ground, some of them still dangerous.

 

94_electromagnetic-geophysic-geofizica_UXO_27 94_electromagnetic-geophysic-geofizica_UXO_18 94_electromagnetic-geophysic-geofizica_UXO_12 94_electromagnetic-geophysic-geofizica_UXO_3 94_electromagnetic-geophysic-geofizica_UXO_11

 

2012_8Mapping of buried utilities and electrical line in order to avoid the occurrence of accidents and damages during the execution drilling research. Since the investigated land was located in an industrial site, the presence of numerous metalic elements made it impossible to use electromagnetic equipment in time domain and vertical magnetic gradient method. Georadar (GPR) method was also impossible to use because of the land deformation, boulders layer and gravel surface; all these prevent coherent and interpretable signal reception. Under these condition we used only electromagnetic induction locator with different frequencies signal. The result were very good and penetration of passive and active cables or pipelines were avoided.

 

2012_7Geophysical investigation through vertical magnetic gradient for highlighting and positioning burried metal objects. Since the land presented many anomalies we used electromagnetic locator with passive and active signal. In these condition has been identified electrical line that crossed the perimeter and buried concret blocks. For land with high electromagnetic noise, the results of many buried metal objects, we rezommend several complementary geophysical methods to disseminate geophysical signal. Profile positioning was performed with high precision RTK GPS.

 

2012_6Electromagnetic measurements for highlighting buried metal objects – utilities, UXO, unknown objects – in order to avoid possible accidents during engineering works. For investigating a perimeter of 16 ha, an EM61MK2 was used, a highly effective tool for such explorations and a RTK GPS with high precision for determining the exact measurement paths. The result of these investigations was to emphasise the areas with a high potential of risk for performing excavation or drilling research.

 

2_Electrical tomographyGeoelectrical investigations, namely electrical tomography, in order to determine the local geological and hydrogeological conditions which favored a landslide on the national road DN6B, Stoina-Hurezani. Investigations have revealed a possible slip plane and the particular geological conditions of the area. These investigations helped draft the design of future geotechnical drillings and works for land stabilization.

3_Electrical tomographySections of electrical tomography in order to characterize the local geological conditions in the area of development of a wind farm. For establishing the exact geological conditions, geoelectrical cross sections were designed and executed, centered on the axis of wind towers. The result helped design the geotechnical drillings and the foundations for future wind towers.

4_Cercetare geoelectrica2Geophysical research through electrical tomography method for highlighting a channel for rainwater collection situated under a future highway. For this research three measuring devices were used – Schlumberger, Wenner and dipole-dipole. The results are very convincing and confirm the effectiveness of using geoelectrical devices for identifying underground utilities and the specific geological characteristics of the investigated site.

5_Electrical tomographyGeoelectrical tomography for identifying local geological and hydrogeological conditions that favored the occurrence of landslides that endanger stability of future works developed in the research area. Geoelectrical sections helped to identify the characteristics of sliding plan and establish measures to stabilize the land. The work involved exploring through cross and longitudinal sections of a line of over 8 km of highway with high traffic areas. In these circumstances it was necessary to execute certain profiles at night to avoid disrupting works in progress and traffic.

6_Geoelectric waterGeoelectrical investigations to identify and characterize local geological conditions found in the area of undercrossing the Danube through horizontal directional drillings. The geoelectrical measurements were performed on water using cables and devices specially designed for this kind of work. Taking into account the Danube’s characteristics in the research area – width of 500 m, flow speed, intense sailing – the geoelectrical measurements were performed in Vertical Electrical Sounding (VES) method using two boats. Locating the exact position of VES was performed with a RTK GPS with high precision and water depth was measured using an Ohmex sonar. The results of these investigations have resulted in an interpretive geological section necessary for designing the future horizontal directional drillings.

Bathymetric measurements for drawing a bathymetric map of a Danube sector between Comasca (Romania) and Marten (Bulgaria). As required, measurements were made on alignments predefined by using Ohmex equipment and GPS GNSS. The compensation of topographic data was done with connection to the network ROMPOS.

Measurements of the variation of vertical magnetic gradient in order to identify metal objects hidden (buried or submerged) on the alignment of the horizontal directional drilling that undercrosses the Danube between Romania and Bulgaria. For the absolute positioning of measurements, a GPS Stonex GNSS equipment with high precision was used. The measuring equipment was magnetically isolated from the rest of the boat so that there would be no influence caused by boat.

Georadar investigations (GPR) in order to identify elements of the sewerage system within the military airport at Deveselu, Romania. The works consisted in the detection and marking of the items of research directly on the location. In this respect it was necessary to calibrate the equipment in order to answer these requirements as well as possible. The results confirmed the existence of underground sewerage network elements.

Geoelectrical investigations through Vertical Electrical Sounding (VES) method and electrical tomography (multielectrod) to identify the local geological conditions that led to landslides near the village Aciliu, Sibiu County. At the same time with the geophysical studies, geotechnical investigations with dynamic penetration were carried out. The results of these studies were very accurate and longitudinal and cross sections that separate the slip plane have resulted.

Georadar investigation (GPR) and natural magnetic field were carried out to identify buried utility networks. The land under investigation is a former industrial platform with good chance that the utilities are active or abandoned. The land area consisted of boulders and debris making georadar measurements difficult in optimal conditions. In these circumstances further investigations were made through the natural magnetic field method.

Georadar investigations (GPR) at Baneasa airport to identify current conditions of the runway and of the aircraft parking platform. In this project a georadar antenna with 900 MHz frequency was used, which highlighted the layers, discontinuities, fissures and utilities in very good conditions. Because of airport conditions, the works were conducted at night, when air traffic was interrupted. The positioning of profiles on existing plans was realized with GPS technology with ROMPOS network link.

Geophysical investigations through geoelectrical methods in direct current (DC) – Vertical Electrical Soundings (VES) and multielectrod (electrical tomography) to identify local geological and hydrogeological conditions in river crossing of river Gauja, Latvia. The interpretation of the geoelectrical sections corroborated with the geological information resulted from the drillings have allowed the development of geological sections that support the design of horizontal directional drilling safely. *

Topographic surveys in order to make detailed plans of a series of perimeters located in Mircea Voda, Corabia, Ploiesti, Giurgiu, Facaeni, Isalnita, Constanta.

Purchase and installation of wind masts which will provide bankable data for future eolian projects in the perimeter Nistoresti-Siriu-Pantelimon – Constanta County. For this project, the Brantax team ensures masts maintenance and collection of meteorological data throughout the functioning period of the wind masts.

Permanent topographical assistance at the wind farm sites at Valea Nucarilor and Iazurile – Tulcea County, Insuratei – Galati County. The team answered all requests arising in such work.

2011_10Georadar investigations in localities Alexandria and Giurgiu to identify network utilities buried under the pavement – road and sidewalk. A series of longitudinal and transversal profiles has been conducted so that the area will be completely scanned. For the exact positioning of the profiles on the plan, GPS technology with connection to ROMPOS network was used.

Georadar investigations (GPR) and multielectrod (electrical tomography) in order to establish local geological conditions and to prevent the interception of possible archaeological remains in Minden-Lübbecke District, Germany. Because georadar investigations have nondestructive and noninvasive nature, they are often preferred in the archaeological researches and they can make important contributions in the accurate knowledge of local conditions. Depending on aspects of the archaeological site other methods can be successfully used such as: vertical magnetic gradient, 2D and 3D electrical tomography, maps of apparent resistivity variation. *

Execution of a series of geoelectrical investigations along the Gadalin-Suceava railway in order to establish the propagation conditions of underground electric currents near the railway. The project is part of the expansion of electricity transmission lines of high voltage.

Geoelectrical study in order to determine the extent of the pegmatite lens with spodumene at Valea Contului, Sibiu County. The geophysical information completed the historical information existing in the mining archives and allowed a first 3D interpretation of the lens of useful material. Depending on the results of geological research drillings, the project can request the extension of geophysical exploration with other methods, too.

Bathymetric and topographic measurements made on the Danube riverside in the project “Ecological reconstruction” at Geraiu Pond, Olt County. Due to the complexity of land, measurements were made using two types of boats – for the Danube and for secondary channels. The obtained data successfully completed LIDAR data provided by the beneficiary.

Bathymetric measurements on rivers Somesul Mare and Somesul Mic in the project of making flood hazard maps and a plan for flood prevention, protection and diminution. The experience gathered in other similar projects allowed making the entire investigation in a short time and with good results. Because of difficult navigation conditions, three types of boats were used and an RTK GPS connected to an amplifier of radio signal.

As a result of the Feasibility Study (FS) on the development conditions of wind farms in the sector-Nistoresti-Pantelimon-Vulturu-Siriu, Constanta County, geotechnical and topographical surveys were conducted for the project of acquisition and installation of wind masts. The project regards the emplacement of 5 wind masts, which cover the entire area of interest.

Geophysical monitoring of the degree of compaction of the land resulted from an infiltration from the local sewer at Hanover District, Germany. In this case both georadar (GPR) and geoelectrical measurements were made using a capacitive device (Ohmmaper). The data was recorded into the database project and the dynamics of local anisotropy are being monitored in time. *

2011_2Geophysical exploration thorough geoelectrical methods in version Vertical Electrical Soundings (VES) and multielectrod (electrical tomography) conducted in the undercrossing project of the rivers Warta and Kapier, Poland. The difficult terrain conditions (waterways, wetlands, abundant vegetation) have required the application of special measures to ensure data acquisition. The data was corrected and filtered in postprocessing and geoelectrical sections were made which showed local geological conditions. The geological sections thus obtained helped design the horizontal directional drillings of undercrossing the area of interest. *

Georadar investigation (GPR) in order to identify local geological conditions that have favored the presence of landslides – Enzkreis District, Germany. As a result of these investigations it was able to identify the areas with collapse potential and to implement measures against potential disasters. *

Electromagnetic investigations (EM) for highlighting the potential unexploded bombs (UXO) under the runway and developing areas of Zurich airport, Switzerland. Using this method, both concrete areas and areas covered with vegetation can be scanned. These investigations result in a map of the location of possible unexploded bombs but underground utilities can also be detected. *

Participation as supervisor in the geophysical works in the undercrossing project of the Daugava river, Latvia. The works were carried out in winter conditions, with a bridge of ice on the river. The results of geophysical investigations corroborated with geological information from drillings have enabled a geological section, which helped to calibrate the installation of horizontal drilling. *

Pre-feasibility study on the conditions of wind farm development in the sector-Nistoresti Pantelimon-Vulturu-Siriu, Constanta. The study involved research area, making 3D terrain model, linking cadastral information, gathering information on the existence of other projects and development stage, making drawings and maps with items of interest: power lines, areas of protection (SCI, SPA reserves and parks), plot plan, roads, sewers, etc.

Participation in the research project regarding the possibility of making an artificial lake in Voitsberg District, Austria. The works were carried in winter conditions using geoelectrical methods in the version of electric tomography (multielectrod). The investigation results have led to several geoelectrical sections, which revealed the local geological structure. Thus, areas with fissures, underground holes, layer boundaries and local anisotropy were put out. *

Geophysical exploration for highlighting local hydrogeological conditions to extend the captation of tap water in Baden District, Switzerland. In the project, a series of geoelectrical profiles has been conducted in the version of electrical tomography (multielectrod) and Mise-a-la-Masse method. By combining these methods, it was possible to highlight the preferential route of the groundwater flow both horizontally and in depth. The results allowed the conducting of excavation works in order to install the collection piping. *

Topographical assistance in wind farm development project Agighiol, Valea Nucarilor and Iazurile, Tulcea County and Pestera, Constanta County. This project requested permanent topographical presence of a team with the necessary equipment: GPS RTK, Robotic Total Station, optical level, laser level.

2010_10Geophysical exploration to identify local lithological conditions and to detect unexploded bombs in the work perimeter in Germany. Through the geoelectrical method in multielectrod version (electrical tomography) a series of geoelectrical sections has been conducted which revealed the sequence of geological layers and the existing discontinuities. To detect any unexploded bombs it was opted for vertical magnetic gradient and maps with the varying intensity of the magnetic field were made. *

Geophysical investigations through georadar method (GPR) to identify and map buried utilities in different locations in Frankfurt, Saarburg, Wunstorf, Eichstetten, Germersheim – Germany. Depending on working conditions and on beneficiary’s requirements, there have been used several types of antennas at different frequencies. The results have allowed plans with the route utilities, burial depth and estimation of the pipes diameter. *

2010_8Hydrogeophysical studies for highlighting local hydrogeological conditions within the investigation perimeter at Dorna, Poiana Negri – Suceava County. Because of special geomorphological conditions, special measures were taken to ensure the quality of the recorded data. The results of these studies have permitted the choice of new locations for the execution of drilling for mineral water extraction. Geoelectrical methods were used in the version of Vertical Electrical Soundings (VES), electrical tomography and Mise-a-la Masse.

2009_92Geophysical studies to identify underground utilities (water pipes, gas, sewer, power lines) in projects of supermarkets development- Bucharest (Doina, Morarilor, Moinesti), Medgidia and Ploiesti. In these projects, vertical magnetic gradient measurements were executed, as well as geoelectrical profiling and georadar.

Geotechnical studies for the development of industrial parks or supermarkets in the cities of Constanta, Giurgiu, Ploiesti. Geotechnical drillings were made with sampling for analysis, standard dynamic penetration and Vertical Electrical Soundings (VES). Special measures were taken to prevent accidents due to interception of electric cables and gas pipes.

Geoelectrical investigations through Vertical Electrical Soundings (VES) method and multielectrod (electrical tomography) in the undercrossing river Odra project, on the border between Germany and Poland. The methods which have been used allowed a detailed geological section necessary for designing the horizontal directional drilling under the river Odra. *

Participation in the first edition of “International Geosciences Student Conference” (IGSC) organized under the auspices of the American Association of Petroleum Geologists (AAPG), Society of Exploration Geophysicists (SEG), European Association of Geoscientists & Engineers (EAGE), Romanian Society of Geophysics (SRG), Geological Society of Romania (SGR) in Bucharest. Our company’s stand offered information to those interested in geophysical methods used in the investigations at small depth to support engineering works. Complex issues of engineering projects involve the application of multiple methods to achieve a more detailed picture of the underground situation from both geological, hydrogeological and buried utilities or objects. In this context, geophysical methods (geoelectrical, georadar, magnetic, electromagnetic, seismic, etc.) together with geological and topographical information can substantially improve the quality of works and can generate cost savings for execution.

S/W Ver: 85.99.82PGeotechnical studies for the water-channel adductions of the localities Copaceni, Dangeni and Diculesti, Valcea County. Studies have been performed for the Feasibility Study (FS) of the project. There have been short drillings and standard dynamic penetration.

Geophysical exploration through seismic methods to identify local geological conditions in the project of undercrossing a portion of the Austrian Alps, in the Silvretta region, Vermunt. Investigations were aimed at highlighting the limit between the strong fissured rock at surface and the bedrock. The results were used in choosing the correct tunnel route to cross the mountain in favorable economic conditions. *

Geophysical investigations through geoelectrical methods in version of electrical tomography (multielectrod) for establishing local geological conditions in the locality Reutte, Switzerland. Measurement results have resulted in 2D and 3D images of the investigated areas where areas with high potential for collapse were identified. For these areas special measures to improve the degree of compaction of the land were recommended. *

Geophysical exploration through geoelectrical methods in version Vertical Electrical Soundings (VES) and images of the thermal gradient. These measurements have revealed the local geological and hydrogeological conditions to detect the causes that led to landslides near the town Hellikon, Switzerland. As a result of the conducted investigations, areas with high potential for collapse were identified and measures against potential disasters have been taken. *

Geoelectrical investigations through Mise-a-la-Masse method to identify the hydrogeological conditions of the area Wurenlos-Huttikon, Switzerland. Through this method it was able to identify groundwater pathways and to design systems for the captation of tap water. The method has good results in areas with infiltrations in resistive rocks – limestone, dolomite, etc. *

Topographic assistance in the construction project of ring road for Ovidiu locality and connection to A2 highway. During the project local support network was examined and alignments were drawn for land stripping. Participation in this project was interrupted as works were stopped for lack of funding.

Topographic assistance in wind farm development project at Agighiol, Tulcea County and Pestera, Constanta County. In this project topographical permanent presence of a team was required having the necessary equipment: GPS RTK, Robotic Total Station, optical level, laser level.

Geophysical investigations through electromagnetic methods to identify potential unexploded bombs under runways and platforms at airport Zweibrucken, Germany. As a result of these measurements, maps with varying electromagnetic field were made which set forth the areas of interest. Because of airport conditions, the works were performed at night. *

Topographic surveys for making the detailed situation plan for the development of some engineering projects – Bucharest (Adevarul, Moinesti, Cascade) Brasov, Curtea de Arges, Tulcea Valcea, Sibiu, Baicoi, Boboci, Campina.

Geophysical investigations for highlighting the ground resistivity variation within the enclosure of Petrobrazi refinery. With previous experience in environments with high risk of explosion, special measures were taken for measurements in the proper conditions.

2009_9Geophysical investigations for detection of buried utilities and unexploded bombs at the perimeters of Medgidia, Ploiesti, Bucharest – Moinesti, Braila, Ciesti, Ticieni. At these investigations, both vertical magnetic gradient method, geoelectrical, in Wenner contouring version and georadar were used.

2009_6-0856Geophysical investigation through Vertical Electric Soundings (VES) method to detect local hydrogeological conditions near the brine lake Ocna Mures. Investigations have indicated the possible danger of landslides due to the immediate presence of the brine lake and the influence of the surface aquifer. Geophysical investigations were supplemented by information from heavy dynamic penetration tests.

Due to the good results obtained in the project of highlighting the failures of contamination near the oil refinery Petrobrazi in 2007, investigations were made on other sites, too. The geoelectrical methods have been successful this time as well, although the configuration of the land required special processing.

Geophysical investigations through resistivity method in multielectrod configuration (electrical tomography) to identify local hydrogeological conditions in the immediate vicinity of Luxembourg. Maps and sections of apparent resistivity variation were made. The interpretation of results has led to a local distribution map with the preferential pathways of groundwater migration. *

Geotechnical surveys in hydrographic basin at Buzau, Trotusi and Siret. Studies were conducted in the project to prevent flood risk. According to the beneficiary’s requirements, a series of sampling holes and heavy dynamic penetration were carried out.

Geotechnical studies for real estate development projects in towns Brasov, Bucharest, Constanta, Medgidia, Giurgiu. Studies were made in order to build some supermarkets or residential parks. Besides the classic investigations (geotechnical drilling and penetration dynamics) geophysical measurements for detection of local anisotropy were also made.

Topographic measurements in wind farm development projects in villages Tartasesti and Pestera. A series of transversal and longitudinal profiles has been made and also situation plans with level curves on each platform. Due to the involvement of several topographic teams and the used equipment (RTK GPS, automated total stations) the field measurements were performed in a very short time and thus responding to the special requirement of the beneficiary.

Topographic assistance in construction projects such as Passage Bucharest – Baneasa ring road, Supermarket Berceni, Cascade Office Building – Bucharest, biodiesel factory at Gara Lehliu. Projects required permanent presence of a team of topographers with specific equipment for such works.

S/W Ver: 85.99.82PSituation plans, cross and longitudinal sections in the project of expansion of the sewer network and tap water in villages Dragasani Buciumeni, Copaceni Dragoesti, Valcea County. The measurements were necessary for the Feasibility Study (FS).

Topographic surveys in order to make the detailed situation plan for supermarkets construction projects: Campulung Muscel, Chiajna, Codlea, Dragasani, Mangalia, Medgidia, Pitesti, Ramnicu Valcea, Rosiorii de Vede, Tulcea, Slobozia, Ciorogarla, Dragomiresti, Targu Mures , Tunari, Zurbaua, Bucharest – Dr. Gazarului.

2008_4Execution of a set of geoelectrical measurements in the perimeter of Petrobrazi refinery for highlighting the lateral variation of the local resistivity. Due to the working environment, special measures to prevent possible electrical accidents during the measurements have been taken.

Geophysical investigations for detecting buried utilities and unexploded bombs in the perimeter Ciesti, Medgidia, Ploiesti, Dragomiresti, Galati and Focsani. As a result of these investigations, maps with the position of buried utilities have been made and possible locations of unexploded bombs have been detected. The results were taken into account in project execution and thus reduced unexpected expenses.

2008_2Hydrogeological study in the perimeter of biodiesel factory, at Lehliu Gara, for the execution of drilling for industrial water extraction in the local aquifer. As a result of these investigations, three locations in the perimeter which met the requirements of the recipient have been found.

OLYMPUS DIGITAL CAMERABathymetric measurements to complete topographic data from the project to realize flood hazard maps and plan for flood prevention, protection and mitigation. The hydrographical basins where the measurements were performed are: Siret, Tarnava Mare, Tarnava Mica, Timis.

OLYMPUS DIGITAL CAMERATopographic measurements in order to make the detailed situation plan of the perimeters of real estate development by building supermarkets. Localities where measurements were performed: Ciorogarla, Dragomiresti, Galati, Sibiu, Tunari, Zurbaua, Constanta, Stefanestii de Jos, Bucharest (Electrotehnica, Tricodava, Frigocom, Berceni, Vacaresti), Ploiesti, Titu, Bolintin Deal, Crovu, Turcoaia , Nicolaie Balcescu, Chiajna, Arad, Focsani, Botosani, Giurgiu, Slatina, Slobozia, Targu Jiu.

Geophysical investigations for detecting hydrocarbon contamination at sites located near Petrobrazi, Ploiesti. In these projects geoelectrical profiles were made. Through this method it has been able to identify with great accuracy the extent of the area affected by hydrocarbon contamination.

OLYMPUS DIGITAL CAMERAGeophysical investigations for detection of buried utilities in real estate development projects at Dragomiresti, Ploiesti and Galati. The vertical magnetic gradient method was used with good results. Interpretation of data led to the mapping area with the network utilities within the perimeter.

OLYMPUS DIGITAL CAMERABathymetric measurements in the project of making flood hazard maps and plan for flood prevention, protection and mitigation developed for the hydrographical basins at Buzau, Cris, Mures, Somes and Timis. As the water depth and the terrain morphology variation were very different, three types of boats with specific equipment for bathymetric measurements have been used: sonar, GPS, total station.

95_geoelectric-geophysic-geofizica_6Geophysical exploration through geoelectrical methods, in version Vertical Electrical Soundings (VES) and Wenner profiling, to determine the local hydrogeological conditions of the area Ranciu, Moldova. The difficulty of this project was that the investigated aquifer was located at a depth of 300 m in sedimentary rocks with low contrast resistivity values.

 

274_magnetism_photo Participation in the project to investigate the archaeological site of Rotbav city, Brasov. Geoelectrical measurements were made in contouring Wenner version, vertical magnetic gradient and georadar. The measurement results have helped to identify areas of interest and for planning the excavations for land stripping.

 

2006_2Permanent topographic assistance in the construction project of Saint-Gobain glass factory, Calarasi and biodiesel factory at Lehliu Gara. Specific equipment was used – total station, RTK GPS, optical level, laser level.

 

2006_1Numerous topographic measurements performed for preparing the detailed site plan and calculating the volume of excavation or deposit: Constanta, Bucharest, Iglicioara, Lehliu Gara, Calarasi, Mihaesti for the realization of industrial construction.

 

2005_1Complex geophysical investigations (Vertical Electrical Soundings, electrical tomography, VLF, seismic) to determine the local hydrogeological conditions in order to reveal tap water in different areas of Afghanistan – Kabul, Gardez, Ghazni, Sharon, Aibach, Khulm, Qual-e-Now. Because in various areas the geology of the terrain was very rugged and in the absence of direct geological information, data interpretation was very difficult. The project was implemented under the USAID program and aimed the supply with water for towns.

* Projects developed in partnership with Dr. Donié Geo-Consult GmbH