TEXAMe Pressuremeter

Category: Geotechnical & Civil Engineering Instrumentats

EASY TO OPERATE PRESSUREMETER

REAL TIME READING AND PLOTTING OF TEST RESULTS

RUGGED CONSTRUCTION

The TEXAMe is the new electronic version of the TEXAM pressuremeter in which the pressure and deformation are measured with electrical sensors and read with a tablet-operated readout.

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Description

The TEXAMe pre-boring pressuremeter is a rugged and reliable instrument that can be used for various ground engineering applications. This pressuremeter distinguishes itself by its ease of use and versatility. Loading is done manually with a screw jack, which allows the user to run tests in either strain or stress controlled steps. The manually-controlled hydraulic loading system ensures a good repeatability of the test, while making unload-reload cycles very easy. The new electronic version of the TEXAMe pressuremeter makes general operation of the equipment even easier and repeatable.

This equipment includes the following parts.

A control unit houses electrical pressure and volume sensors, connectors, a control valve and a manual actuator (screw jack) for pressurizing the water in the cylinder via a piston.

A readout unit consists of the D/P BOX unit operated with an Andoid tablet. This versatile readout is compatible with other pressuremeters manufactured by Roctest. A special application, installed on the tablet, allows configuring the tests and calibrations, to read and plot the test results in real-time, to log the data, and to review test results.

A water-filled probe is fitted with an easy-to-replace single outer sheath. This sheath consists of rubber typically protected with metallic fins.

And finally an easy-to-repair, high-pressure tubing connects the probe to the control unit.

Test Procedure

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.

Test Results

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, Creep Pressure, and the Limit Pressure. A tool (TexamCompanion) developed by Roctest can be used for that purpose.

Specifications

Control unit
Working pressure	10 000 kPa (1500 psi)
Dimensions	40 x 46 x 125 cm (l x w x h) assembled
Weight	30 kg / 28 kg (Box / Actuator)

D/P BOX Readout unit
User Interface	Bluetooth communication with an Android Tablet
Resolution	1 kPa and 0.01 cm3
Power Supply	2 x 12 V, 2.3 A, rechargeable batteries
Dimensions	25 x 28 x 12 cm (l x w x h)
Housing	Splashproof, resistant ABS case
Autonomy	> 8 hours typically
Power supply interface	Universal AC wall plug with US/Euro adapter + adapter cable for car (lighter) & for external battery

Note: D/P BOX & Android Tablet sold separately

Probe
Diameter	74 mm (N Long) / 44 mm (A)
Length	72 cm / 84 cm
Weight	6.4 kg / 4.5 kg
Max radial expansion	35 %

Ordering Info

Please specify:

Tubing length (25, 33 , or 50 m)
Probe diameter
Accessories (metallic sheaths, rings) and optional items

Optional Accessories

A high-precision digital gage kit to be connected on the front panel as a backup reading.
A mechanical volume counter to install on the handle shaft, also for backup reading.
A slotted casing assembly compatible with A-size probe, for use in difficult soils (gravely soils).

Note that the TEXAMe is compatible with the BOREMAC and PENCEL Probes – see sparate brochures for more details.