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Vibration test equipment SOL-CH
cross-hole

vibration test equipment
vibration test equipment
vibration test equipment
vibration test equipment
vibration test equipment
vibration test equipment
vibration test equipment
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Characteristics

Test type
vibration, cross-hole

Description

Cross-Hole survey consists in the direct measurements of horizontally travelling compression (P) and shear (S) seismic waves at test sites consisting primarily of soil materials. A borehole seismic source is used to generate a seismic wave train. One or more receivers are used to detect the arrival of the seismic wave train in offset borings; the distance between boreholes at the test depths is measured using a borehole deviation survey. Wave velocity is calculated from the measured distance and travel time for the respective wave train. To generate P waves an automatic energy source, SOLGEO SPARKER™ is used; it can work at many different levels of power (from 100J to 350J) ensuring frequency contents from 100 Hz up to 6 kHz; it must be used in boreholes filled with water, up to 200 m depth. An hydrophone is used as receiver of P waves in a borehole filled with water. SOLGEO GEOS-H™ is used to generate S waves; it has the possibility to work in boreholes up to 200 m of depth also filled of water. The energy source substantially is composed by two parts: a central section, that contains the pneumatic clamping assembly and second part that contains the electrodynamics waves generator. The device allows to automatically produce both upwards and downwards signals, in order to obtain an inversion of the shear waves polarization without P waves noise.

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