The geotechnical investigations for civil engineering

The site investigations for the individual house. There is one of the easiest and least time-consuming geotechnical investigations. It is often attributed to the first (I) geotechnical category.

The geotechnical investigations for the site of the individual house are carried out by the following field methods:

  • Borehole drilling to determine the geological structure;
  • Cone penetration test (CPT );
  • Cone penetration test with pore water pressure measurement ( CPTU );
  • Dynamic penetration test ( DPSH ).

After field work and data interpretation, we will provide geotechnical report, which contains information about:

  • site topography;
  • natural soil and rock lithological structure;
  • the thickness of fill;
  • groundwater level depth;
  • exogenous processes which are taking place in the construction site;
  • the physical and mechanical properties of soils and rocks;
  • rock karstification degree if the field works were carried out in the karst region.

The site investigations for the commercial engineering. The geotechnical investigations are carried out in construction site before building non-residential civil buildings (such as libraries, hospitals, office buildings and etc.), industrial buildings (such as factories, warehouses and etc. ) and multi-store buildings. This is a quite complicated survey type. And it is often attributed to the second (II) or the third (III) geotechnical category. Therefore these investigations require greater time and labor costs.

The geotechnical investigations are carried out by the following field methods:

Borehole drilling with disturbed or/and undisturbed soil sampling for laboratory tests;

  • Cone penetration test (CPT);
  • Cone penetration test with pore water pressure measurement (CPTU);
  • Dynamic penetration test (DPSH).
  • Laboratory testing of soil physical and mechanical properties.

After field work and data interpretation, we will provide geotechnical report, which contains information about:

  • Site topography;
  • Natural soil and rock lithological structure;
  • The thickness of fill;
  • Groundwater level depth;
  • Groundwater aggressiveness to the concrete;
  • Exogenous processes which are taking place in the construction site;
  • The physical and mechanical properties of soils and rocks;
  • Rock karstification degree if the field works were carried out in the karst region.

 

The site investigations for the linear infrastructure. The surveys are carried out in construction site before building a linear infrastructure and communication structures (such as roads, railways, water-supply, sewerage, communication lines and etc.). Usually the investigations do not require a deep drilling and is attributed to the first (I) geotechnical category.

Linear infrastructure constructions geological surveys carried out in the following field methods:

  • Borehole drilling with disturbed soil sampling for laboratory tests;
  • Cone penetration test (CPT );
  • Cone penetration test with pore water pressure measurement ( CPTU );
  • Dynamic penetration test ( DPSH ).
  • Plate load test (PLT);
  • Laboratory testing of soil granulometric, frost sensitivity, physical and mechanical properties.

After field work and data analysis, we will provide the geotechnical report, which contains information about:

  • Topography of construction area;
  • Natural soil and rock lithological structure;
  • The thickness of the fill;
  • Groundwater level depth;
  • Exogenous processes which are taking place in the construction area;
  • The physical and mechanical properties of soils and rocks determined by laboratory and in situ methods;
  • The road base soil grain size and the degree of compaction;
  • Rock karstification degree if the field works were carried out in the karst region.

 

The geotechnical investigations for the older structures. These are carried out before the reconstruction of old structures (buildings in the old town, bridges, and etc.). We use the field methods as:

  • Borehole drilling near and under the foundation with disturbed soil sampling for laboratory tests;
  • Hole digging for the assessment of foundation quality;
  • Cone penetration test (CPT );
  • Cone penetration test with pore water pressure measurement ( CPTU );
  • Dynamic penetration test ( DPSH );
  • Laboratory testing of soil physical and mechanical properties.

After field work, data analysis and interpretation, we will provide geotechnical report, which contains information about:

  • The topography of the area;
  • Natural soil and rock lithological structure;
  • The structure and quality of the foundation;
  • The thickness of the fill;
  • Groundwater level depth;
  • Groundwater aggressiveness on concrete (according to customer’s request);
  • Exogenous processes which are taking place in the area;
  • The physical and mechanical properties of soils and rocks determined by laboratory and in situ methods;

 

The fill compaction investigations. During these we determined the compaction quality of fill.

The compaction tests are carried out by using the following methods:

  • Borehole drilling with disturbed soil sampling for laboratory tests;
  • Cone penetration test (CPT );
  • Dynamic penetration test ( DPSH );
  • Plate load test (PLT);
  • Laboratory tests.

After field and laboratory works, we will provide geotechnical report, which contains information about:

  • The fill compaction quality, distinguishing low and well compacted areas;
  • The soil granulometric compound;
  • Different zones of deformation modulus values ​​( Ev);
  • Different zones of compaction index values ​​( DPr) .

 

Geotechnical monitoring is carried out to find out the environmental impact on already constructed buildings or natural environmental changes under the influence of external factors. During this monitoring we measure buildings foundation movement, the formation of cracks in the walls, slopes loss and so on. For that purpose we install special measurement system (inclinometers, extensiometers) at the observation place. We will periodically submit geotechnical monitoring result reports to the customer, which will assess the state of the observed object and will predict the possible changes in the future.

Navigation
Menu