Model TEXAM - Pressure Meter Brochure

TECHNICAL DESCRIPTION The probe A cylindrical hollow body fitted with an inflatablesheath. The control unit - A metal case that houses the main cylinder, four quick connectors and the control valve. - A manual actuator to operate the piston. - A digital pressure gauge. The tubing A high-pressure single conduit fitted with a shut-offquick connect to keep the probe and tubing saturated.GENERAL DESCRIPTION The TEXAM pressuremeter is a reliable instrument forthe evaluation of most ground engineering problems. It is used to run routine in-situ loading tests at variousdepths. The well-proven method developed by LouisMenard is used to interpret the test results forcalculation of: • Bearing capacity of shallow and deep foundations • Settlement of all types of foundations • Deformation of laterally loaded piles and sheet piles • Resistance of anchors FEATURES • Easier to operate than Ménard-type pressuremeters • Rugged construction • No compressed gas necessary • Controlled rate of deformation • Easy cyclic testing • Optional equipment is available for creep testing PRESSUREMETER Model TEXAM® Where instrumentation technologies meet Roctest Ltd. · 665 Pine Avenue, Saint-Lambert, QC, J4P 2P4 CANADA · Phone 1-450-465-1113 · Fax 1-450-465-1938 · info@roctest.com · www.roctest.com Telemac SA · 10, avenue Eiffel, 77220 Gretz-Armainvilliers, FRANCE · Phone +33-1-64-06-40-80 · Fax +33-1-64-06-40-26 · info@telemac.fr · www.telemac.fr Smartec SA · Via Pobiette 11, CH-6928 Manno, SWITZERLAND · Phone +41 91 610 1800 · Fax +41 91 610 1801 · smartec@smartec.ch · www.smartec.ch Products and specifications are subject to change without notice. © Roctest Ltd., 2011. ORDERING INFORMATION Texam® unit ordering number: FR-1001A50100 Tubing length available in 25m, 33m and 50m Specify probe dimension and rubber or metallic sheath. TEST PROCEDURE The probe is placed at the test depth in a pre-drilledborehole obtained by a method adapted to the soilconditions: augering, rotation with drag bit andbentonite, shelby tube driving, etc. In granular soilsbelow the water table, the probe can be drivendirectly within a slotted casing. The test is run either with a constant rate ofdeformation,by using a uniform rate of rotation of theactuator, or with equal increments of pressure as forthe Menard pressuremeter test. TEST RESULTS An in-situ stress-strain curve is obtained by plottingthe injected volume against pressure. The limit pressure PL is the pressure at which failureoccurs, and it reflects directly the bearing capacity: Qa = (C/F) × PL Where: Qa = Allowable bearing capacity C = Shape factor F = Safety factor • The modulus of deformation E is used to calculate settlements and is given by: E = (1 + ?) 2V(?P/?V) Where: ? = Poisson’s ratio V = Cavity volume at the middle of the elastic zone ?P/?V = Pressure variation dependent on volume variation Example of pressuremeter test results ACCESSORIES • Slotted casing assembly for direct driving of the AX-size probe in granular soils below the water table • Creep test kit for long term testing at constant pressure SPECIFICATIONS CONTROL UNIT Working pressure (max.) 10 000 kPa (1500 psi) Gauge precision 0.05% FS Gauge resolution 1 kPa Actuator capacity 10 tons Dimensions L = 40 cm W = 46 cm (including handles) H = 45 cm Metal case weight 30 kg Actuator weight 28 kg PROBES Diameter 74 mm (NX Long) 44 mm (AX)* Length 72 cm 59 cm Weight 6.4 kg 4.5 kg *For use with slotted casing E5001A-110330