Goodman Jack
The Goodman Jack consists of a hydraulic jack with curved bearing plates, LVDT sensors, a displacement indicator, a hydraulic pump with a pressure gauge, a hydraulic hose, an electrical cable, and a coupler for drill rods.
The jack is attached to the drill rod and inserted into the borehole. A hand pump is used to create hydraulic pressure in the lines connected to the jack, which in turn activates the pistons and produces a uniform and unidirectional stress field at the bearing plate. The applied hydraulic pressure is measured with a standard Bourdon-type pressure gauge. The deformation of the rock is measured by two linear variable differential transformers (LVDT) and data are displayed by the indicator at the surface. After the test, the bearing plates are retracted by reversed pistons, and the jack is withdrawn from the borehole.
The modulus of deformation is calculated using formulae derived empirically from in-situ testing and correction factors that were developed by laboratory testing.
It is designed to be used in 3″ (76 mm) boreholes.
Two models are available:
- A twelve-piston model for use in hard rock, and
- A three-piston model for determining the consolidation-time properties of soft rock, soil, and stiff clays.
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| PART NUMBERS | ||
|---|---|---|
| Goodman Jack, Hard Rock | 52100100 | Hydraulic borehole probe for in situ tests in hard rock. Includes two LVDT displacement transducers, waterproof electrical connector, two self-sealing hydraulic quick-connectors, and threaded BX adapter |
| Goodman Jack, Soft Rock | 52100200 | Hydraulic borehole probe for in situ tests in soft rock. Includes two LVDT displacement transducers, waterproof electrical connector, two self-sealing hydraulic quick-connectors, and threaded BX adapter |
| Displacement Reader Tablet | 52102800 | Requires Android tablet connected over Bluetooth. Records displacement and pressure, and can display both English and Metric units. |
| 50330985 | Samsung Galaxy Tab Active5 | |
| Electrical Cable Assembly | 52100500 | Shielded, multi-conductor cable, waterproof connectors on each end, 15 m (50’) |
| Jumper cable | 52102850 | Wiring harness connects the displacement / pressure reader to the jack electrical cable and pressure transducer. |
| Hydraulic Hose Assembly | 52100600 | High Pressure Hydraulic Hose, 1/4-inch (6.4 mm.) I.D., double steel wire braid, SAE 100R2 Type A, with self-sealing quick-connectors each end, 50 ft (15 m) |
| Hydraulic Pump, Model P-84 | 52100700 | Two-stage, 10,000 psi (70 MPa), with selector valve |
| Hydraulic Tee Assembly | 52100800 | Includes three self-sealing quick-connectors for easily connecting hydraulic hose, pressure gauge and hydraulic pump |
| Pressure Transducer | 52100930 | 10,000 psi (70 mPa), 4-20 mA pressure transducer |
| Hydraulic Oil, HF-101 | 52102400 | Note: Carriers require surcharge and separate documents for air shipments of hydraulic oil |
| Carrying Case | 52101500 | Wooden carrying case for shipping and storage of Goodman Jack and accessories |
| HARD ROCK JACK | |
|---|---|
| Number of Pistons | 12 |
| Max Bearing Pressure | 64,000 kPa (9,300 psi) |
| Maximum Force | 703 kN (158,100 lbf) |
| Borehole Size | 76 mm, 3″ nominal |
| Minimum Diameter | 70 mm (2.75″) |
| Maximum Diameter | 83 mm (3.25″) |
| Linearity | ±0.5% for range of 73.7 to 78.7 mm (2.9 to 3.1″), ±1% for range of 72.4 to 80 mm (2.875 to 3.15″) |
| Maximum Hydraulic Pressure | 69,000 kPa (10,000 psi) |
| Operating Temp | -32 to 60 °C (-25 to 140 °F) |
| Temp. Coefficient | ±(0.04% Reading + 0.02% FS) per °C. ±(0.02% Reading + 0.01% FS) per °F |
| Dimensions | 70 x 445 mm (2.75 x 17.5″) |
| Weight | 15 kg (33 lb) |
| SOFT ROCK JACK | |
|---|---|
| Number of Pistons | 3 |
| Max Bearing Pressure | 38,200 kPa (5,540 psi) |
| Maximum Force | 419 kN (94,200 lbf) |
| Borehole Size | 76mm, 3″ nominal |
| Minimum Diameter | 70 mm (2.75″) |
| Maximum Diameter | 83 mm (3.25″) |
| Linearity | ±0.5% for range of 73.7 to 78.7 mm (2.9 to 3.1″), ±1% for range of 72.4 to 80 mm (2.875 to 3.15″) |
| Maximum Hydraulic Pressure | 69,000 kPa (10,000 psi) |
| Operating Temp | -32 to 60 °C (-25 to 140 °F) |
| Temp. Coefficient | ±(0.04% Reading + 0.02% FS) per °C. ±(0.02% Reading + 0.01% FS) per °F |
| Dimensions | 70 x 445 mm (2.75 x 17.5″) |
| Weight | 15 kg (33 lb) |
| DISPLACEMENT INDICATOR | |
|---|---|
| User Interface | Bluetooth communication with an Android tablet (tablet sold separately) |
| Memory | Typically over 10 000 data sets (tablet-dependent) |
| Accuracy | ± 0.0004” over ±0.1” range (±0.01 mm over ± 2.5 mm) |
| ADC | 24 bits |
| Relative Humidity | ≤95 % (non-condensing) |
| Data Output Format | CSV spreadsheet format |
| Power Supply interface | Universal AC wall plug with Euro/US adapter + adapter cable for car (lighter) and for external battery. |
| Battery | 2 x 12 V 2.3 A, rechargeable > 8 hours |
| Battery Charger | Internal from 115/230 VAC or 10-15 VDC |
| Operating Temp | -4 to 158 °F (-20 to 70°C ) |
| Connectors | 4-pin female connector for external power input and battery charger 10-pin female connector for Goodman Jack USB connector for charging tablet |
| Case | Waterproof, shock resistant ABS plastic |
| Dimensions | 9.8″ L x 11″ W x 4.7″ H (25 x 28 x 12 cm) |
| Weight | 9.5 lb (4.3 kg) |
| HAND PUMP | |
|---|---|
| Hydraulic Pump | Enerpac P-84 |
| Maximum Pressure | 69,000 kPa 10,000 psi |
| Pressure Gauge | 50 psi (345 kPa) resolution with accuracy of ±0.5% FS |
| Dimensions | 690 x 180 x 150 mm (27 x 7 x 6″) |
| Weight | 13 kg (29 lb). Hose and cable add 10 kg per 15 m (22 lb per 50’) |