Engineering topography

For the development of an engineering project for construction or construction rehabilitation a great importance and attention must be given to the projected cotes and to the verification of the interest elements.

Precision land surveys Situation detailed plans High precision contouring Slope vertically tracing Labeling the site topographical network The assignment of the axes and of the landmark contouring Protract the important elements Follow up the time schedule of the buildings construction Measurements for the calculation of the excavation capacities

Using specialized software and equipment, the responsible persons can offer the required support in accomplishing the proposed objectives of the project.

Applications:

Bathymetrical investigations

The bathymetry can be taken for the aquatic equivalent of altimetry. Being a branch of hydrometrics, the bathymetry is dealing with the measurements of the sea depth, lakes and river depth, allowing us to draw maps of their aquatic relief.

Descending the depth measurements technique with the help of the sonar and the exact position given by the GPS technology, we can draft for you depth maps or base relief structure maps for lakes or rivers, and also bathymetric profiles on the interest zones.

This type of measurements has a large applicability in various fields and can contribute to a good acknowledgement of the geo-morphological conditions:

Tracking down the cloging of rivers and lakes Tracking down the excavation from the ballast-holes Exploration of the mineral aggregates from the river Drawing the maps for flooding risks Bathymetric sections and maps Hydrological studies

Applications:

Geoelectrical investigations

The geoelectrical investigation is one of the main methods of geophysics with the help of which we can determinate the geological, hydrological and technological characteristics of the underground.

Geological characteristics determinations Map drawing of the contamination spots Infiltrations in dams and dikes Identifying of the non-homogeneities Galleries and underground cavities Groundwater exploration Identifying the fissures and drifts Buried pipes Geological sections

By adapting a device, the method can be applied also on rivers or lakes, which allows us to find out their base structure, where the regular methods are not able or they are difficult to be applied.The multi-electrode method allows us to scan the field both in 2D and in 3D the last one being ideal for the investigation of extended surfaces.

Applications:

This method allows an investigation depth which varies from 10-30 m for the engineering projects and it can go until 300 m for the geological and hydrological researches.

Magnetical and electromagnetical investigations

More than often, the locations of the future buildings are full of underground networks of pipes, sewages or electrical wires. In order to avoid future problems in the execution of the works and very useful in the design phase of the project we must take into consideration the possible existence of those networks.

With the help of magnetical measurements we are able to identify all kind of metallic objects buried in the underground.

•Electrical buried networks •Construction foundations•Concrete pipes•Unexploded bombs•Metallic pipes•Buried docks

This kind of investigations can be made both on soil and lakes or rivers. The method is most applicable on the vacant lands, un-affected by the industrial environment, having a high profitableness.

Applications:

Georadar investigations

GRP (Ground Penetrating Radar) is an electromagnetic method non-destructive which has a large practicability in the industrial environments where the surface is covered with concrete. The investigation depth depends on the geological environment where the research is located, and for the engineering projects this depth is of 6-8 m.

• The analysis and the identification of the tunnels• Geological and hydrological explorations• Identifying the buried pipes• Map drawing of the contamination spots• Identifying the electrical buried cables• Identifying the underground cavities • Archeological researches

In particular situations, depending on the working conditions, we can obtain 3D images with the interest zone allowing us to see in detail the underground conditions.

Applications:

Seismic refraction and MASW

Seismic refraction is a useful method for investigating geological structure and rock properties. The technique involves the observation of a seismic signal that has been refracted between layers of contrasting seismic velocity.

• Stratigraphic mapping• Estimation of depth to bedrock• Estimation of depth to water table • Predicting the rippability of specific rock ypes • Locating sinkholes• Landfill investigations• Geotechnical investigations

Applications:

Multichannel analysis surface waves (MASW) tests determine the speed profile of Vs shear waves, therefore:

•Seismic actions for designing and verifying Civil Engineering works•The soil seismic type (A, B, C, D, E, S1, S2)•The soil rigidity module•Sinking and displacement of works that interact with the soil: buildings, bridges, embankment rises, supporting works, etc..

Hydrotechnical projects

The geophysical surveys use non-destructive methods to allow extensive investigations of various hydro technical projects:

- Land, rock or concrete dams - Protection dykes - Functional dykes

Geoelectrical – Using the Vertical Electrical Survey (SEV), Electrical Tomography or Mise-a-la-masse, this method has proven most efficient for locating areas of water infiltrations and for scanning the density of the built-in material from the dykes or dams.

Georadar (GPR) – It has a very high resolution and accuracy for areas made of concrete, locating holes and anomalies in the density of the material below.

Seismical – This profiling method can accurately show data about the homogeneity of the built-in material from dams or dykes.

Methods used:

Rivers and lakes under-crossing

We use specific geophysical and geotechnical methods to obtain results which substantially improve the knowledge about the itinerary of rivers and lakes under-crossings.

Geoelectrical – using Vertical Electrical Survey (SEV) or Electrical Tomography, this method has proven most efficient over time due to its high precision rate.

Magnetic Gradient – it can be used when we need to locate the metallic items on the itinerary of the under-crossing.

Georadar (GPR) – this method has a high resolution and can be used in case of shallow waters 1-3 meters deep

Land measurements – it delivers maps and topographic profiles needed in drawing-up the future works.

Batimetry – this investigates the water depth, complementing the information from the surface land measurements.

Methods used:

Infrastructure projects As a result of our extensive experience in Romania and abroad, we developed a complex package of services dedicated to the infrastructure projects development: all types of roads, water works, major pipes, river under-crossing.

Topographic measurements:•Vectorization maps and plans•3D modeling for large areas•GPS measurements•Situation plans•Longitudinal and transverse sections•Stakeout and verticalization•Accuracy levellingGeotechnical studies:•Geotechnical drilling•Dynamic penetration tests•Plate test•Sampling•Laboratory tests•DocumentationGeophysical investigations:•Vertical Electrical Sounding (VES)•Geoelectrical profiles•Geoelectrical maps•Magnetic measurements•Electromagnetic measurements

Mapping buried utilities and other items

We use dedicated geophysical methods to scan extensive areas in order to locate underground items:

•Water utilities– concrete, metal or PVC•Electricity lines– medium and high voltage •Buried pipes – water, gas, petroleum products, etc •Unexploded buried bombs ( UXO)

The depth of investigation varies from 1 to 6 meters and it depends on the area under survey and on the size of the utilities in question. The methods are non-destructive and highly accurate.

Methods used for locating under ground utilities:

Georadar (GPR) – it is highly efficient for industrial areas covered in concrete

Magnetic Gradient – this method is efficient for locating utilities buried under large agriculture fields

Electromagnetic – this is complementing the information for the industrial areas, for metallic pipes and electricity lines.

We can make such investigations on land or on rivers and lakes.

Photovoltaic parks We can help you put the basis of a photovoltaic park by acquiring all the needed information about the characteristics of the project area. We perform measurements and surveys which allow a safer and more efficient development of such projects in any given location.

Topographical surveys:•3D modeling for large areas•GPS measurements•Situation plans•Stakeout and marking•Finally drawing

Geotechnical studies:•Geotechnical drilling•Dynamic penetration tests•Plate test•Sampling•Laboratory tests•Documentation

Geophysical investigations:•UXO investigations•Mapping underground utilities•Electrical Resistivity Imaging •Seismic Refraction and MASW

Wind power parks The different stages of a wind power park project require various studies and surveys: land measurements, geotechnical studies, geophysical surveys. We have extensive experience in performing all these services and we can offer you the best prices on the market.

Topographic measurements:•3D modeling large areas•GPS measurements•Longitudinal and transverse sections•Situation plans•Stakeout roads and ditches•Stakeout and plumb poles

Geotechnical studies:•Geotechnical drilling•Dynamic penetration tests•Plate test•Sampling•Laboratory tests•Documentation

Geophysical investigations:•Seismic Refraction •Seismic Surface Wave •Electrical Resistivity Imaging•Vertical Electrical Sounding (VES)

Aerial photographyAerial photography provides useful insights into the development of projects from the design stage, going to execution, inspection and maintenance. Using drones (UAV) to capture aerial imagery brings extra flexibility in works approach with much lower costs compared to conventional aircraft.

Aerial photography application:

• Orthophotomap and photogrammetry• 3D terrain model• Oblique and panoramic images• Electrical Network Monitoring•Agricultural and forestry inspection•Multispectral photos• Infrared thermal photos• Industrial and residential buildings• Wind farms and photovoltaic•Construction and infrastructure monitoring•Monitoring excavation pits•Volume calculation of excavated material deposits•Archaeological photos•Communication pathways mapping

Geotechnical studies

Represent the first stage of the construction or strengthening of a target. This kind of investigation gives information about soil structure and consistence, groundwater level and provide recommendations for the technical project.

Geotechnical services:

•Geotechnical drillings•Dynamic penetration tests•Foundation uncover•Plate tests•Sampling•Laboratory tests•Hidrogeological studies•Elaboration of the documentation

The geological structure and the physical-mechanical characteristics of the ground play an important role in designing buildings. Using direct methods (open digging, drilling, sampling for laboratory tests etc.), and indirect methods (geophysical methods), determination of these characteristics is done with high precision. This method helps to perform resistance and economical calculation.