Ausrüstung

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Seismic sources

Weight dropper FFWD-GX II

Weight dropper FFWD-GX IIFree fall of a 360 kg hammer from a height of 4 m with a tool mounted on an IVECO Daily truck.

The tool is equipped with a locking mechanism preventing the rebound of the weight when it hits the base plate.

Under favourable conditions investigation depths of 4500 m have been attained.

Weight dropper BISON EWG III

Weight dropper BISON EWG IIIThe fall of a 250 kg steel piston is accelerated by elastic rubber slings. The drop height is 0.8 m. The tool is mounted on a 4×4 GAZ truck.

Under favourable conditions investigation depths of 3000 m have been attained.

Weight dropper VAKIMPAK

Weight dropper VAKIMPAKThe weight is a 50 kg hammer striking upon an anvil in an airtight cylinder. The fall is accelerated by the vacuum produced when the hammer is lifted. The drop height is 1.6m, the total weight is 750 kg.

Under favourable conditions investigation depths of 900 m have been attained.

Weight droppper SAWD

Weight droppper SAWDThe weight of 15 kg is accelerated by a spring. The SAWD is equipped with a small hydraulic weight lifting unit driven by an electric motor. In order to save battery power the lifting of the weight can be assisted manually. Very handy in rough terrain, the total weight is 150 kg.

Explosives

Explosives30 g until 1 kg

Sledgehammers

Sledgehammer5 until 12 kg

Shear beam

Shear beamGeoExperts shear beam for the generation of SH-waves. The 70 kg beam is encased at the ends with steel plates. Beam to ground coupling is improved by several spikes driven into the ground and/or by loading the axle load of vehicle wheels. Using an 8 kg sledge hammer to strike alternately both ends of the beam produces SH-wave trains of opposite polarities, which are used for the identification of the refracted s-wave arrival times.

Seismic recording systems

Smart System by Seismic Instruments

Smart System by Seismic Instruments

  • 18 x 20 channels: 10Hz digital geophones for hybrid seismic surveying
  • 6 x 20 channels: 4.5Hz digital geophones for multichannel analysis of surface waves (Rayleigh MASW)
  • Central remote unit for data recording using a standard PC
  • Seismic Instruments (Austin, USA)

SUMMIT Compact by DMT GmbH & Co. KG

SUMMIT Compact by DMT GmbH & Co. KG

  • 10 × 24 channels: 10Hz and 20Hz geophones (24 bit delta sigma technology)
  • 4 x 24 channels: shear wave geophones for multichannel analysis of surface waves (Love MASW) and S-waves refraction tomography
  • DMT GmbH & Co. KG (Essen, Germany)

Seismic processing software

SPW

RadExPro

Rayfract

SurfSeis

winMASW

  • by Eliosoft (Trieste, Italy)
  • Software for Surface Wave Analysis