Transient unloading loosening simulation test system for structural surface excavation of underground caverns

A technology of transient unloading loosening and simulation test system, which is applied in the direction of machine/structural component testing, measuring devices, instruments, etc., can solve the problems of inability to intuitively understand the displacement and vibration of rock mass with structural planes, and achieve the applicable Wide range of effects suitable for research

Inactive Publication Date: 2017-07-11
WUHAN UNIV OF TECH
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Problems solved by technology

[0003] However, previous scholars have only studied the transient unloading and loosening of rock mass with structural planes through theoretical analysis and numerical simulation, and cannot intuitively understand the process of transient unloading and loosening of rock mass with structural planes. Displacement and vibration in

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  • Transient unloading loosening simulation test system for structural surface excavation of underground caverns
  • Transient unloading loosening simulation test system for structural surface excavation of underground caverns
  • Transient unloading loosening simulation test system for structural surface excavation of underground caverns

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Embodiment Construction

[0038] The present invention will be further described below in conjunction with the accompanying drawings.

[0039] see Figure 1-Figure 11 , an underground cavern structural surface excavation transient unloading loosening simulation test system, it includes the excavated underground cavern surrounding rock model 17 containing the structural surface, a confining pressure loading system 30, a test bench 18, a loading device, Excavation cavern loading and unloading device 15, monitoring system, the excavated underground cavern surrounding rock model 17 containing structural surface is placed in the confining pressure loading system 30;

[0040] The excavated cavern loading and unloading device 15 includes a lever-type loading and unloading member, the front end of which extends into the excavated underground cavern surrounding rock model 17 with structural surfaces, and is close to the excavated underground cavern surrounding rock model 17. The groove wall of the underground ...

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Abstract

The invention discloses a transient unloading and loosening simulation test system for the excavation of structural surfaces in underground caverns. Excavation chamber loading and unloading device, monitoring system, excavation chamber loading and unloading device includes lever-type loading and unloading components, the lever-type loading and unloading components are fixed on the test bench through threaded steel bars; loading devices include lever-type loading and unloading components respectively Loading and unloading units on both sides of the component. The loading and unloading units include hydraulic stations, oil cylinders, steel bars, suction cup electromagnets, and steel pipes; there are reaction piers on both sides of the test bench, and the bottom of the oil cylinder is in contact with the reaction piers. The present invention aims at the problem that it is difficult to simulate high-speed unloading in previous experiments, and realizes the rapid unloading of the load on the excavated underground cavern surrounding rock model with structural surfaces, so that the model produces a large strain rate, which is consistent with the actual The unloading conditions in the project are more consistent, and have more research value and reference significance.

Description

technical field [0001] The invention belongs to the field of geotechnical engineering model experiment devices, and in particular relates to a transient unloading loosening simulation test system for excavation of structural surfaces of underground caverns. Background technique [0002] The sudden change of surrounding rock displacement induced by the excavation of underground powerhouses of hydropower stations in Southwest my country is very prominent, posing severe challenges to the smooth progress of engineering construction and the safety of personnel and equipment. During the blasting and excavation of deep underground engineering, the excavation disturbance of the rock mass will cause the transient unloading and stress redistribution of the surrounding rock mass. When the surrounding rock contains structural planes, the transient unloading of the rock mass may cause structural The expansion and penetration of the surface and the opening and sliding deformation lead to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M99/00
Inventor 罗忆黄俊红李新平郭运华
Owner WUHAN UNIV OF TECH
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