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ROCTEST TEXAM Instruction Manual

Pressuremeter
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e
TEXAM
PRESSUREMETER
I
M
NSTRUCTION
ANUAL
 Roctest Limited, 2017. All rights reserved.
This product should be installed and operated only by qualified personnel. Its misuse is potentially dangerous. The Company makes no warranty as to the information furnished
in this manual and assumes no liability for damages resulting from the installation or use of this product. The information herein is subject to change without notification.
Tel. : 1.450.465.1113 • 1.877.ROCTEST (USA, Canada) • 33 (1) 64.06.40.80 (Europe) • www.roctest.com • www.telemac.com
E1001A-171107

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  • Page 1 The information herein is subject to change without notification. Tel. : 1.450.465.1113 • 1.877.ROCTEST (USA, Canada) • 33 (1) 64.06.40.80 (Europe) • www.roctest.com • www.telemac.com...

  • Page 2: Table Of Contents

    Connecting and turning on the DP BOX .............7 Using the DP BOX READER APPS ..............8 4.4.1 Main Menu ....................8 4.4.2 Using the DP BOX READER APPS with the TEXAM .........9 SATURATING THE EQUIPMENT ................13 Saturating the control box cylinder ..............13 Saturation check ....................15 Saturating the tubing probe assembly ..............

  • Page 3: Definition And Purpose Of Test

    E1001A-171107 1 DEFINITION AND PURPOSE OF TEST The pressuremeter test is a load test carried out in-situ in a borehole. An inflatable cylindrical probe is set at testing depth in a pre-drilled borehole within a soil or rock mass or by direct driving into the mass. The method depends on the materials’ characteristics. The pressuremeter uses a hydraulic control unit to load and to monitor the tested material’s response.

  • Page 4: Equipment Description

    A mechanical actuator is used to displace a piston which travels within a cylinder filled with the inflation fluid. The TEXAM is comprised of: a) A control unit, which contains a cylinder, a piston, connectors, sensors, and a valve.
  • Page 5 E1001A-171107 TEXAM Control Unit Large handle Screw jack (actuator) Hexagonal Nut (4) Washer (4) Knurled Nut 8-32 Flat Head Screw (4) Volume Counter (optional) Handle Support Column (4) Control Box Please see the appendix for additional components descriptions.

  • Page 6: Equipment Assembly

    E1001A-171107 3 EQUIPMENT ASSEMBLY 1. The control unit comes in two separate boxes, one containing the actuator and the other containing the cylinder, piston and front plate. Remove the cover from the control unit case. 2. Screw in the 4 actuator support columns (i). The knurled portion of the columns points downward and the columns are hand tightened.

  • Page 7: Using The Dp Box

    DP BOX communicating with a tablet by Bluetooth The DP BOX is designed for reading and logging measurements obtained from pressuremeters and dilatometers manufactured by Roctest (including models DMP 95, TEXAM and PROBEX). Thanks to the Bluetooth communication feature and to the DP...

  • Page 8: Installing The Dp Box Reader Apps

    4.2 INSTALLING THE DP BOX READER APPS Prior from using the DP Box, the DP Box READER Application should be installed on a Tablet. This application can be downloaded from Roctest web site. 4.3 CONNECTING AND TURNING ON THE DP BOX Connect the electrical cable of the testing equipment to the DP Box.

  • Page 9: Using The Dp Box Reader Apps

    E1001A-171107 Open the DP Box Application and go in ‘Settings / Quick Reading’ for establishing Bluetooth communication between the DP Box and the Tablet, which will be confirmed when the DP box LED will blink quicker (see below for more information). 4.4 USING THE DP BOX READER APPS The DP Box Application allows configuring the unit, to read and to log the data, and to review the results.

  • Page 10: Using The Dp Box Reader Apps With The Texam

    DP Box Application Main Menu 4.4.2 USING THE DP BOX READER APPS WITH THE TEXAM First Go to ‘Settings’. The APPS will automatically scan for establishing Bluetooth communication with the DP BOX which takes a few seconds. The name of the DP Box...
  • Page 11 E1001A-171107 The DP Box name should appear here Go to ‘Instrument / Add a New Instrument’ and Select the ‘Type of instrument’ (TEXAM) and enter the serial number appearing on the control unit (e.g. 001A17003). Select for additional functions (Editing,...
  • Page 12 Select the type of calibration  Select a probe (by giving a serial number – generally indicated on the probe itself – and by selecting ‘Texam NL Vulcolan rings, NL steel rings A probe or slotted casing’ probe)  Dive a calibration ID ...
  • Page 13 E1001A-171107 Typical set up: Timer Typical (sec) ‘CAP+Date’ Pressure loss calibration ‘CAV+Date’ Volume loss calibration ‘TE+Date’ Test The Apps will automatically increment selected ID Once setup is completed, select: ‘Begin Calibration or Test’ to start. Once calibration or testing is started, a window like the one below will be displayed. After saving the initial readings, the operator should press ‘Start’...

  • Page 14: Saturating The Equipment

    - of clean water or antifreeze solution. It is imperative to maintain the ends of the tubings submerged during the saturation. Otherwise, air will enter the TEXAM . You may tape the tubings to the bottle for ensuring that.
  • Page 15 14. Set valve No. 6 on "FILL". 15. Bring the piston to 0 cc, by turning the crank handle counter clockwise. When fully lowered, wait a few seconds and perform the saturation check. TEXAM Facia...

  • Page 16: Saturation Check

    E1001A-171107 Valve # 6 Hydraulic Circuit Schematic Diagram 5.2 SATURATION CHECK 1. Set valve No. 6 on "TEST". 2. The volume and pressure should indicate around zero. 3. Install the large crank handle (a) on the rear side of the actuator and pressurize the unit up to 2,500 kPa by rotating the large crank handle clockwise.

  • Page 17: Saturating The Tubing Probe Assembly

    E1001A-171107 5.3 SATURATING THE TUBING PROBE ASSEMBLY 1. Connect the extremity of the Tecalan tubing fitted with the quick connect to port No. 1. Thread the other end of the tubing through the probe to rod adaptor and connect it to the probe.

  • Page 18: Calibration For Volume Correction

    Rotary drilling with axial injection of prepared mud is the most versatile method and is recommended for most cases. Methods using injection of fluids are especially suited for the TEXAM since this pressuremeter requires fluid in deep boreholes (deeper than 10 m) for deflating the probe.

  • Page 19: Strain Controlled Test

    Pf / 2, and then back the same way up to Pf. Another method consists in reducing pressure in three equal-pressure steps down to a point slightly above Po, and then back the same way up to Pf. Roctest recommends using the latter method.

  • Page 20: Stress Controlled Test

    NOTE : The loading sequence suggested in the ASTM-4719 Standard differs from the sequence described above. According to the TEXAM developer and manufacturer, the method described in this manual yields equivalent results – within normal accuracy range of the PMT testing in general - while being easier to follow and slightly more accurate.
  • Page 21 E1001A-171107 outwards. In cases where removal of either type of tapered ring is difficult, the application of heat (using a propane torch or hot air gun, max. 65°C) uniformly over the rings will facilitate their removal. 4- Remove used sheath. 5- Clean all parts and probe’s body and make sure o-rings are not damaged.
  • Page 22 E1001A-171107 11- Tightly put electrical tape at each end of the sheath in order to squeezing the rubber and metallic strips. 12- Put MOLYKOTE 33 LIGHT grease (Extreme low temperature grease) on the probe’s threads, on the electrical tape, on the inner wall of yellow vulcolan rings, and on the flat inner side of the brass knurled nut.

  • Page 23: Transport

    Usually 1/8" of a turn will suffice to stop the leak. 10.2 SOFT MATERIAL The inertia of the TEXAM membrane is very low (30-70 kPa) which allows its use in very soft soils. However, special precautions must be taken not to remould the boreholes...

  • Page 24: Rock

    10.4 DRY BOREHOLE Past a certain depth (about 5 m), the use of the TEXAM is possible only if the hole is filled with fluid. The resistance of the membrane being small and due to the effect of the water column inside the equipment, the probe will start to expand quickly if it is lowered in a dry hole.

  • Page 25: Cleaning The Filter

    E1001A-171107 12.2 CLEANING THE FILTER The filter mounted on the copper line connected to the Port No. 1 must be checked periodically. If it gets plugged, it will be difficult to deflate the probe. To check it, proceed as follows: Remove the front panel from the control unit box as indicated above.
  • Page 26 E1001A-171107 = Corrected volume increase at the center of the ΔV volume increase ΔP =Corrected pressure increase in the linear zone of the pressure-volume curve between V and V ΔV =Corrected volume increase in the linear zone of the pressure-volume curve between V and V Pressure and volume are corrected as follows:...
  • Page 27 P is to estimate it on the manually-extended pressuremeter curve. Note that Roctest offers a spreadsheet TEXAMCOMPANION for data reduction. You may contact us to get a free copy. Reading interpretation can be done referring to the following documents: ...

  • Page 28: Miscellaneous

    E1001A-171107 14 MISCELLANEOUS Creep test The creep test kit makes it possible to carry out creep tests by maintaining a constant pressure for a long period of time. To perform creep tests: 1. Disconnect the actuator screw from the cylinder shaft by unscrewing the knurled nut. 2.
  • Page 29 E1001A-171107 Tecalan Tubing and Connectors Tecalan Tubing Assembly Tecalan Connector (10- 1001001145) including a Socket (b) and a Coupling Adaptor from probe to Tecalan Ferrule (05-R17LA1111000) Modified Nut 10 mm (10-1001001149) Male quick connect Elbow Connector (optional) Union for splicing the Tecalan Union for connecting a Tecalan to an extension...
  • Page 30 E1001A-171107 Typical Corrected Test Data...
  • Page 31 E1001A-171107 Optional Pressure Gauge Operation : For more info see www.ashcroft.com...
  • Page 32 E1001A-171107 TEXAM Probe - Critical Pressure - Volume Values 1800 Unless otherwise specified, the test is terminated when sufficient data has been accumulated for the intended purposed of the test (typically 1700 between 1000 and 1200 cc for an NL probe), or before reaching high risks of bursting the probe, as indicated on this chart.
  • Page 33 E1001A-171107 Site: Site: Date: Time: Date: Time: Borehole no: Depth: Borehole no: Depth: Calibration: Calibration: Calibration Calibration Probe  : Probe  : Ref: Ref: Volume Pressure Variations Volume Pressure Variations Units: Units: Units: Units: Soil Description: ________________________________________________Temperature: ___________ Pressuremeter Type: _________________________ Notes: ____________________________________ _____________________________________________________________ Operator: _______________ PRESSUREMETER TEST DATA SHEET...

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