Fully automatic multifunctional unsaturated soil triaxial apparatus

　　Fully automatic multifunctional unsaturated soil triaxial apparatus

Fully automatic multifunctional unsaturated soil triaxial apparatus

Main technical indicators

1. Dual chamber pressure chamber, sample size: Ø 39.1mm × H.80mm, Ø 61.8mm × H.125mm (dual chamber pressure chamber), resistant to 2MPa pressure;

2. Surrounding pressure: using water pressure loading (not air pressure loading or gas to water conversion method), 0-2 MPa, resolution 1kPa, accuracy+/-1kPa, volume 0-250ml, equipped with USB communication interface, 16 film buttons embedded in the front panel of the controller (non external connection button controller), matched with non touch LCD. Automatic protective device to prevent exceeding pressure and volume. Pressure regulation and display up to 1kPa; Volume resolution 0.001ml, accuracy+/-0.01ml.

3. Reverse pressure: using water pressure loading (not using air pressure loading or gas to water conversion method), 0-2 MPa, resolution 1kPa, accuracy+/-1kPa, volume 0-250ml, equipped with USB communication interface, 16 bit film buttons embedded in the front panel of the controller (non external connection button controller), matched with non touch LCD. Automatic protective device to prevent exceeding pressure and volume. Pressure regulation and display up to 1kPa; Volume resolution 0.001ml, accuracy+/-0.01ml.

4. Permeation pressure: using water pressure loading (not air pressure loading or gas to water conversion method), 0-2 MPa, resolution 1kPa, accuracy+/-1kPa, volume 0-250ml, equipped with USB communication interface, embedded 16 position film button on the front panel of the controller (non external connection button controller), matched with non touch LCD. Automatic protective device to prevent exceeding pressure and volume. Pressure regulation and display up to 1kPa; Volume resolution 0.001ml, accuracy+/-0.01ml.

5. Host: Non touch LCD screen, resolution 240 * 128; Speed range of 0.00001~6mm/min, stepless speed regulation, with fast forward and rewind functions, axial force of 30kN, equipped with 30kN load sensor, accuracy+/-0.1% F.S; Axial displacement measurement range 0-50mm, resolution 0.001mm, accuracy+/-0.1% F.S; The front-end panel of the host is embedded with 16 thin film button control (non external connection button controller), and has a built-in 4-channel acquisition instrument (non external acquisition instrument), which can collect various sensors such as hole pressure, load, LVDT, PT100 temperature sensor, etc. It is equipped with 4 sets of LED status indicator lights to display the working status of the instrument.

6. An independent total volume measurement system with unlimited measurement range (for triaxial volume measurement of unsaturated soil):

Can continuously and accurately measure volume changes;

Unrestricted measurement range, accuracy<=0.05ml;

Supporting displacement digital sensor: with a range of 0-25.4mm, a resolution of 0.01mm, and an accuracy of 0.03mm, it can work with its own button battery or be powered by the acquisition system. It has an LCD display that can display in and mm units, a reset button for sensor zeroing, and is connected to the built-in acquisition instrument to measure axial displacement changes in real time.

The complete set of equipment includes the top chamber, conversion box, sensors, as well as installation brackets and cables.

7. Pore gas pressure controller: 0.001-900kPa, control accuracy+/-1kPa, resolution 0.1kPa, equipped with a non touch LCD screen, resolution not greater than 192 * 64, equipped with no more than 16 membrane buttons, including 0-9 numeric keys, a load key Run, an unload key Unloading, a switch key Nest, a confirm key Enter, a cancel key Esc, and a set key Set, with a power not exceeding 24W, equipped with 2 sets of filtering systems.

8. Penetration attachment: 500kPa high air intake value ceramic clay board penetration attachment.

9. The data acquisition system (including relevant sensors, computer software, and acquisition instruments) automatically collects experimental data.

10. Computer control processing software, supporting new operating systems:

1) Data collection module;

2) Unsaturated soil consolidation module;

3) Unsaturated soil strain triaxial testing module:

4) Unsaturated soil stress path module:

Four dimensional control (axial stress, radial stress, pore air pressure, pore water pressure);

5) Unsaturated soil triaxial creep module;

6) Two way equal pressure unsaturated soil permeability triaxial test.

11. Supporting Chinese version - Unsaturated soil stress path triaxial permeability rheological multifunctional software:

1) Fully automatic control of the experimental process: The computer can automatically control the entire experimental process, including experimental control and data collection, automatic saving, etc;

2) Windows version software used for control during experiments and data processing after experiments, supporting Windows 10 and 11 systems;

3) Control method: It can be either strain control or stress control;

4) Test module control: The software uses multiple test modules for control, including data acquisition module, unsaturated soil consolidation module, unsaturated soil strain triaxial testing module, unsaturated soil stress path module, unsaturated soil triaxial creep module, and 6) bidirectional equal pressure unsaturated soil permeability triaxial test; Automatically collect and save various parameters in real-time, and can be combined with any experimental module according to the experimental plan design; Each module can set temperature control range and temperature loading gradient; Capable of conducting temperature and stress coupling tests, as well as temperature, permeability, and stress coupling tests;

5) Software data collection: The software system automatically stores and displays data. The software experiment display part adopts dual Y coordinate display, and the coordinate display parameters can be arbitrarily changed. It can display four graphic windows simultaneously (all using dual Y coordinate display, and X and dual Y display objects can be set by oneself);

6) Sensor calibration: The software system comes with a sensor calibration module that can calibrate sensors and other components;

7) Data display interface: At least 4 display interfaces that can be set to display real-time data and switch freely; Scalable curve; Functions such as copying charts, saving charts, printing charts, and displaying the coordinates of points on curves;

8) Data processing module: Select at least 3 different confining pressure test data to automatically draw Mohr circles, calculate C and ￠ values.

11. Temperature controller temperature control range: -5~+100 ℃, using liquid circulation, equipped with temperature sensors, pressure chamber installed with temperature sensors, real-time measurement of sample temperature, temperature control accuracy+/-0.1 ℃;