Due to the fact that the on-site tests are carried out in the natural and real conditions of the earth both in terms of the size, direction and distribution of existing stresses and in terms of structural and textural inhomogeneities of soils and rocks, they give a more accurate assessment of the conditions of the earth. Based on this, during geotechnical operations, depending on the scope and importance of the project, on-site (desert) tests are observed in the studies.The on-site testing section of these consulting engineers includes 4 sub-sections as described below.
Soil mechanics field tests
- Direct cutting on large scale
- Plate loading up to 80 cm in diameter
- Pressiometry in fine-grained and coarse-grained materials
- shear-vane
- SPT and CPT tests
- Lufran permeability, poring test
- Perform pumping test
- digital anchor tension up to 6 tons with one micron reading
- Pull out test
On-site tests of rock mechanics
- Dilatometry up to a depth of 100 meters at a pressure of 80 bar
- Jacking (plate loading) with a diameter of one meter
- Direct cutting on the discontinuity surfaces (70 x 70 cm)
- Point loading, Schmidt hammer
- Permeability test in rock (Lujan)
- Excavation of exploratory galleries
Geophysical in situ experiments
The geophysics department of these engineers was developed since 2017 with the aim of geophysical tests that are needed in geotechnics. One of the records recorded in this department is the conduct of the Dunhole test up to a depth of 70 meters in the alluvial borehole in the Bushehr project.
- (Downhole) seismic studies
- Interwell seismic studies (crosshole, crosshole thermography)
- Two-dimensional and three-dimensional tomography seismic studies
- Boundary and reflection fault surface seismic studies
- Geoelectric and induced polarization studies (2D and 3D)
- Geoelectricity (2D and 3D)
- Electric vertical catheterization
- GPR method
- PIT pile health tests
Gas measurement tests
- Determining the percentage of flammable (LEL) and harmful gases (Co and SO4)
