Three-dimensional non-uniform loading/unloading and steady pressure model test system

An auto-controlled pressure true three-dimensional non-uniform loading/unloading and steady pressure model test system, comprising:

• a counterforce device;
• a pressure three-dimensional non-uniform loading/unloading device;
• a hydraulic loading/unloading and steady pressure automatic control system;
• an automatic model displacement test system;
• and a multi-probe peeping system, wherein the pressure three-dimensional non-uniform loading/unloading device is automatically controlled via an input instruction of the hydraulic loading/unloading and steady pressure automatic control system to carry out pressure three-dimensional gradient non-uniform loading/unloading and steady pressure control:
• the automatic model displacement test system automatically acquires displacement of any part inside a test model:
• and the multi-probe peeping system observes a cavern excavation deformation and failure process of a cavern located within the test model dynamically in real time;
• and a loading guide frame device is arranged juxtapose to the exterior of the test model, and the loading guide frame device is formed by welding stainless steel square tubes;
• and before loading, a loading steel plate of the test model abuts the surface of the test model and is embedded into the loading guide frame device at a predetermined depth.

An auto-controlled pressure true three-dimensional non-uniform loading/unloading and steady pressure model test system, comprising:

• a counterforce device;
• a pressure three-dimensional non-uniform loading/unloading device;
• a hydraulic loading/unloading and steady pressure automatic control system;
• an automatic model displacement test system;
• and a multi-probe peeping system, wherein the pressure three-dimensional non-uniform loading/unloading device is automatically controlled via an input instruction of the hydraulic loading/unloading and steady pressure automatic control system to carry out pressure three-dimensional gradient non-uniform loading/unloading and steady pressure control;
• the automatic model displacement test system automatically acquires displacement of any part inside the test model;
• and the multi-probe peeping system observes a cavern excavation deformation and failure process of a cavern located within the test model dynamically in real time;
• and the hydraulic loading/unloading and steady pressure automatic control system comprises a visual human-machine interaction system, a PLC hydraulic system and a pressure execution system;
• the visual human-machine interaction system transmits and receives information to and from the PLC hydraulic system;
• and the PLC hydraulic system transmits and receives information to and from the pressure execution system.

An auto-controlled pressure true three-dimensional non-uniform loading/unloading and steady pressure model test system, comprising:

• a counterforce device;
• a pressure three-dimensional non-uniform loading/unloading device;
• a hydraulic loading/unloading and steady pressure automatic control system;
• an automatic model displacement test system;
• and a multi-probe peeping system, wherein the pressure three-dimensional non-uniform loading/unloading device is automatically controlled via an input instruction of the hydraulic loading/unloading and steady pressure automatic control system to carry out pressure three-dimensional gradient non-uniform loading/unloading and steady pressure control;
• the automatic model displacement test system automatically acquires displacement of any part inside a test model;
• and the multi-probe peeping system observes a cavern excavation deformation and failure process of a cavern located within the test model dynamically in real time;
• the automatic model displacement test system comprises a displacement transfer device, a displacement measuring device, a signal conversion device, a data processing device and a computer system;
• the displacement transfer device detects the displacement of the test model, the displacement measuring device transmits the displacement information to the signal conversion device, the signal conversion device transmits information to the data processing device, and the data processing device transmits information to the computer system;
• and when the test model produces a displacement, the displacement transfer device transfers the displacement of a model measuring point to the displacement measuring device via a flexible measuring rod, and the displacement measuring device converts the displacement of the test model measuring point into a moire fringe displacement via a grating ruler sensor;
• the signal conversion device converts the moire fringe displacement into an electric pulse signal via a photoelectric conversion element and transmits the electric pulse signal to the data processing device;
• the data processing device receives the electric pulse signal and converts the electric pulse signal into a digital signal, then model displacements are calculated, and stored and displayed on the computer system in real time, meanwhile, model displacement time-history curves are automatically generated for a tester to dynamically observe and monitor the displacement of the test model, so that digital and visual automatic measurement of the displacement of the test model is realized.

An auto-controlled pressure true three-dimensional non-uniform loading/unloading and steady pressure model test system, comprising:

• a counterforce device;
• a pressure three-dimensional non-uniform loading/unloading device;
• a hydraulic loading/unloading and steady pressure automatic control system;
• an automatic model displacement test system;
• and a multi-probe peeping system, wherein the pressure three-dimensional non-uniform loading/unloading device is automatically controlled via an input instruction of the hydraulic loading/unloading and steady pressure automatic control system to carry out pressure three-dimensional gradient non-uniform loading/unloading and steady pressure control;
• the automatic model displacement test system automatically acquires displacement of any part inside a test model;
• and the multi-probe peeping system observes a cavern excavation deformation and failure process of a cavern located within the test model dynamically in real time;
• and wherein the multi-probe peeping system comprises a plurality of probes, a camera control panel, a data storage box and a liquid crystal display;
• the plurality of probes are arranged at any inner or outer part of the cavern;
• and an acquired video is displayed on the liquid crystal display in real time and automatically stored in a data storage.