The Texam pre-boring pressuremeter is a reliable instrument for the evaluation of various ground engineering problems. Its used to run routine in-situ loading tests at various depths.
- A cylindrical hollow body fitted with an inflatable sheath.
The control unit
- A metal case that houses the main cylinder, four quick connectors and the control valve.
- A manual actuator (screw jack) to operate the piston.
- A digital pressure gauge.
- A high-pressure single conduit fitted with a shut-off quick connect to keep the probe and tubing saturated.
The probe is placed at the test depth in a pre-drilled borehole obtained by a method adapted to the soil conditions: wet rotary drilling, augering, shelby tube pushing, etc. In granular soils below the water table, the probe can be driven directly within a slotted casing. The test is run either with a constant rate of deformation by using a uniform rate of rotation of the actuator, or with equal increments of pressure as for the Menard pressuremeter test.
An in-situ stress-strain curve is obtained by plotting the injected volume against pressure. The main parameters yielded from the test readings are the Pressuremeter Modulus Ep, Creep Pressure Pf, and the Limit Pressure PL.
|Working pressure||10 000 kPa (1500 psi)|
|Pressure accuracy||0.05% FS|
|Pressure resolution||1 kPa|
|Volumetric resolution||0.01 cc|
|Dimensions||L = 40 cm
W = 46 cm (including handle)
H = 45 cm
|Metal case weight||30 kg|
|Actuator weight||28 kg|
|Diameter||74 mm (N Long)||44 mm (A)|
|Length||72 cm||59 cm|
|Weight||6.4 kg||4.5 kg|