GEOTECHNICAL SURVEY

I. Engineering geological survey consultancy
Engineering geological survey aims to study stratigraphy, structural and tectonic characteristics of rock and soil; study hydrogeological characteristics, determine the physical and mechanical properties and permeability of rock layers to serve the design and construction of foundation works, assess and handle geological phenomena such as subsidence , sliding, sliding, …

This is one of the strengths of the company in the capacity of implementing projects, implementing experimental criteria in the field of engineering geological survey, hydrogeology.

Regarding equipment for surveying work imported from well-known firms like APAGEO (France), Humboltd (USA), Slope Indicator, Geokon (USA), GeoNor (Norway), GeoMil (Netherlands), PASI (Italy) ) … meet the requirements of complying with Vietnamese standards (TCVN), foreign standards ASTM, BS or AASHTO …

With a large staff in which the number of doctors, masters is trained at well-known schools in the world, meeting the requirements in the field of Geotechnical engineering for projects. such as bridges, roads, hydroelectric dams, irrigation, high-rise housing, civil and industrial projects and technical infrastructure …

Contents of work of geological survey consultancy

Drilling geological survey: Serving for soil and rock sampling and field experiments, especially the company has Jackup offshore rig for marine engineering geological survey, this is the system that can be implemented in the sea with all the conditions of waves and complicated weather.

1. Static penetration test with pore water pressure measurement (CPTu)	2. Horizontal compression test (PMT)
GeoMil static transverse device (Netherlands) provides parameters of resistance through nose tip, friction into unit, pore water pressure, … Thereby, it is possible to calculate related parameters such as power undrained shear resistance, consolidation coefficient, ground bearing capacity …	Provides deformation module parameters and limited ground pressure, for foundation calculation design. The horizontal compression device of APAGEO (France) can be made up to a depth of 120m.
3. Determination of resistivity & surface seismic (RST)	4. Field Cut-off Test (FVST)
Determine the resistivity at the depths of the soil layers, to calculate the design of the lightning protection system, evaluate the possibility of corrosion of electrical equipment ….  Determine the longitudinal wave velocity of P and the transverse wave velocity S according to the selected route in natural conditions, Poison coefficient, cutting module or elastic modulus, serving the calculation of anti-seismic design for the project.	GeoNor H10 wing cutting device can provide the intensity value of cutting without drainage (Su) and ground sensitivity. Equipment can perform  to a depth of 30m. Combined with Jack up rigs, it is possible to experiment with cutting wings on the sea and on the river but other equipment cannot be performed.
5. Static static compression test (PLT)	6. Pressure resistance test (TRT)
Determine the deformation modulus of the ground, to calculate to calculate the load capacity and the settlement. Evaluate the bearing capacity of the ground against the load capacity of the design	By measuring the heat capacity and monitoring the temperature over time, the thermal conductivity  and the thermal resistance of 1 / suất of the environment can be calculated at the test sites.
7. Field permeability experiment (FPT)	8. Seismic experiment of drilling hole (DHT)
Determine the hydrogeological parameters of loose soil layers such as permeability coefficient, flow rate, water conductivity coefficient, Lugeon coefficient … By methods such as water pumping experiment, water pouring experiment, experiment pressing water in bore holes …	Determine the longitudinal wave velocity of P and the horizontal wave velocity S along the hole wall in natural conditions, Poison coefficient, cutting module or elastic modulus, serving the calculation of anti-seismic design for the project.
9. Soil and physical testing
Soil and physical laboratory: Invested in large-scale, laboratory equipment to determine the physical and mechanical criteria of the soil to meet the standards of TCVN, ASTM, BS, JIS … The equipment is invested synchronously with the CDAS central data acquisition system along with specialized software corresponding to the experimental criteria, allowing the acquisition of experimental data automatically with real time. This allows to minimize errors and can take data from multiple samples corresponding to each different experimental criteria without affecting the test results due to the delay of the data recording time. experiment. In addition to the capacity to perform laboratory tests to determine common physical criteria. The department also has the capacity to implement consolidation testing criteria, QU, UU, CU, CD.
Prepare construction geological consultancy report Data processing is performed by automated software such as Geotechnical Software 7.0, CPTask, Res1D, Res2D, PASI Gea3, InterSism, Humboltd, CDAS, Midas GTS NX 2015 … Processing results by software automatically will produce the fastest survey results, while allowing to minimize the errors appear related to human factors. Software allows calculations, designs and solutions for foundation solutions.