The geotechnical works are based on mapping the explored land by performing an inventory of all natural and human-made features, which may impact the geotechnical aim. The mapping is conducted on an adequate topographic support, which may be a detailed topographic survey, a published topographic map or an aerial orthophotography. Our services include the following mapping services:
Depending on the technical features of the machine, the dynamic penetration is classified as follows:
|Type of Penetration||Symbol||Hammer Weight [Kh]|
|Light Dynamic Penetration||LDP||10±0,1|
|Medium Dynamic Penetration||MDP||30±0,3|
|High Dynamic Penetration||HDP||50±0,5|
The standard penetration test is used to:
The penetration resistance is measured based on the necessary blows (N) for 300mm, after fixing depth (150 mm), i.e. the test is conducted at 450mm depth.
The Cone Penetration Test (CPT) is establishing the soil and soft rocks strength upon penetration of a cone, together with the local friction on the sleeve. The Cone Piezo-cone Test (CPTU) is in fact a Cone Penetration Test that is using an electric cone, and includes some additional instruments aimed at establishing pores water pressure.
The raw data recorded during the CPTU are set forth below:
Minimum works required for a hydrogeological exploration are: