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Crawler-Based DPT and SPT Sounding Rigs

Real handy and easy to operate dynamic sounding rig with excellent terrain capabilities, suitable for dynamic penetration tests according to ISO 22476-2 (replaces DIN 4094-3). The unit is based on a crawler undercarriage with hydrostatic drive and passive brakes and a foldable mast for easy transport. The crawler is provided with a sturdy framework incorporating all technical components and 2 storage lockers.

The SPT version is also capable of doing SPT type dynamic penetration tests according to ASTM D1586 and ASTM D4633. All versions are also capable of taking soil samples.

The hydraulic power-pack (with one hydraulic pump) can also power an hydraulic pulling cylinder for retrieving the tubes after a test. Because of the design of the rig it is not necessary to move the unit when the tubes are retrieved.

Because of its design the unit is a true 1-man-operation machine. It passes through every normal access door and can easily be transported on a 2-axle trailer or inside e.g. a Volkswagen Transporter. German quality at an affordable price.

  • Engine: Honda GX-270 4-stroke gasoline engine (6 kW at 3600 RPM)
  • Hydraulic pump: Gearpump, 8 cm²/rev, 160 Bar
  • Hydraulic tank: 20 liter – Biodegradable oil
  • Dimensions standing upright (working position): 1915 x 780 x 2340 mm (L x W x H)
  • Dimensions collapsed (transport position): 2350 x 780 x 1200 mm (L x W x H)
  • Effective mast length: 1250 mm
  • Drop height: 500 mm
  • Weight incl. 10 kg base weight: Approx. 480 kg
  • Additional drop weights: 20 + 20 kg
  • DPT drop weights: 10 kg for DPL, 30 kg for DPM and 50 kg for DPH
  • Number of blows per minute: Adjustable from 10 to 30
  • Sideward tilting: ± 20º
  • Forward tilting: 30º
  • Backward tilting: 35º
  • Standard version: 500 mm
  • Combined DPT and SPT version: 500 and 750 mm (selectable)
  • Basic drop weight: 10 kg for DPL tests according to ISO 22476-2
  • Basic drop weight + 20 kg: 30 kg for DPM tests according to ISO 22476-2
  • Basic drop weight + 40 kg: 50 kg for DPH tests according to ISO 22476-2
  • Basic drop weight + 53.5 kg: 63.5 kg for SPT tests according to ASTM D1586 and AFNOR-B