Microcomputer controlled unsaturated geotechnical triaxial testing machine

Microcomputer controlled unsaturated geotechnical triaxial testing machine
1. Overview
Microcomputer controlled unsaturated geotechnical triaxial testing machine uses three cylindrical specimens and tests them under different constant surrounding pressures (i.e. Under small principal stress 3
), apply axial pressure (
that is, principal stress difference (
-3
)), shear until failure, and measure the shear strength of the soil. , and then according to the Mohr-Coulomb theory, the shear strength parameters, the total shear strength parameters and the effective shear strength parameters of fine-grained soil and sandy soil are obtained. This testing machine adopts computer multi-channel closed-loop digital control. Its measurement accuracy and control degree are in the leading position in the same industry. It is an ideal geotechnical testing equipment for water conservancy and hydropower, universities, colleges and scientific research institutes.
This testing machine can perform the following geotechnical tests:
Unconsolidated and undrained shear test
The sample is not allowed to drain during the entire process of applying ambient pressure and increasing axial force until failure. , used to determine the total shear strength parameters.
Consolidated undrained triaxial shear test or
After the sample is drained and consolidated under a certain surrounding pressure, and then maintained in an undrained state, the axial force is increased until failure, and the total resistance is measured. shear strength parameter, or effective shear strength parameter, and pore pressure coefficient.
Consolidation and drainage triaxial shear test
After the sample is drained and consolidated under a certain surrounding pressure, the axial force is increased until failure while allowing the sample to be fully drained. The measured Effective shear strength parameters,.
Conventional unsaturated soil triaxial test measures pore water pressure and pore air pressure
2. Main technical parameters
, axial maximum load:
, axial load accuracy: better than .
Maximum axial displacement:
, Axial displacement (deformation) accuracy:... Graduation value:
, Ambient pressure range: Measurement accuracy:.
, Back pressure Range: Measurement accuracy:.
, Pore water pressure range:. Measurement accuracy:.
, Pore air pressure range: Measurement accuracy:.
, Volume variable range: Measurement accuracy:... Graduation value:
, Axial strain controlled loading speed
, Axial stress controlled loading speed
, Triaxial pressure chamber pressure:
Sample size:.,
, Multi-channel multi-parameter fully digital closed-loop control, automatically adjust system values, using high-resolution feedback sampling and signal conditioning technology
, selectable force (stress), deformation (strain), displacement and other controls Mode
, the testing machine control system can automatically calibrate the accuracy of the testing machine, can automatically adjust zero
, full digital display
, 3
,
, 3
,
,
,
and other engineering quantities, multiple channels can independently complete measurement, display, and control tasks in parallel.
, test control software, runs in various environments such as / etc., has a friendly interface and simple operation, and can complete the settings of test conditions, sample parameters, etc., and test data processing. The test data can be saved in a variety of file formats. After the test, the test process can be reproduced and the test data can be played back. It can be imported into various software such as , , , and b to perform operations such as statistics, editing, classification, and fitting test curves. After completion, the test report can be printed out.
3. Equipment configuration
, one three-axis test host
, one double-layer pressure chamber
one set of axial servo control loading system
, confining pressure servo A set of control system
, a set of volume change control and measurement system
, a set of pore air pressure control and measurement system
, a set of pore water pressure control and measurement system
, water and air combination A set of testing system (optional)
, a set of equal inflow and drainage system
, a set of fully digital multi-channel computer control system
, and a set of unsaturated soil test control and data processing software
One set each of computer and printer