Measurements in geotechnics

More recently, borehole logging has increasingly taken on tasks related to the exploration of the underground of planned infrastructure activities. In addition to the extension of evaluation methods and techniques, the intensive development of specific measurement techniques also began.

Following this development, BLM GmbH has also started to use new measuring methods. These include scanner procedures (acoustic / optical), which allow an optical evaluation of the structural conditions (joint structures and their course) in the rock.
With consideration of further measuring methods a complex evaluation of the existing rock is possible, which allows e.g. the localization and quantification of aquifers.

The concrete tasks within the scope of services usually arise in connection with preliminary exploration work for road and highway constructions as well as tunnel constructions.

The measuring programs are specifically compiled according to the task definition in order to increase the accuracy of the borehole geophysical results. The processing and interpretation of the results is of great importance, as additional important parameters can be obtained in this way.

Our equipment

The available equipment of BLM GmbH includes the following methods:
Caliper
CAL-3, CAL-4
Borehole deviation
BA
Full Wave Sonic / Cement Bond Log
Full Wave Sonic / Cement Bond Log
Resistance measurements
focused [FEL] or inductive [IL], small/large resistivity standards [EL-KN/EL-GN]
Flow direction measurement
FLRI
Gamma Ray Log
GR
Density Log
GG.D
Milieu parameters
MIL: pH, ORP, O2, nitrate
Imaging methods
camera inspection [TV], acoustic scanner [ABF], optical scanner [OPTV].
Spectral Gamma Ray Log
SGR
Neutron Log
NN
Conductivity / temperature of the fluid
SAL / TEMP
Flowmeter
FLOW

Shallow wells

The investigation of these boreholes, which primarily serve exploration targets in the field of hydrogeology and water management
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Deep wells

For the purpose of exploration, development of deposits or monitoring of underground geological or hydrodynamic conditions.
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Under pressure

“Under pressure” refers to the condition that there is gas overpressure in the riser of production probe installations or that water wells are highly artesian.
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