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Excavation transient unloading loose simulation experiment system for underground cavern structural plane

A technology of transient unloading and loosening, simulating test system, applied in the direction of machine/structural component testing, measuring devices, instruments, etc. Wide range of effects suitable for research

Inactive Publication Date: 2015-07-22
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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  • Excavation transient unloading loose simulation experiment system for underground cavern structural plane
  • Excavation transient unloading loose simulation experiment system for underground cavern structural plane
  • Excavation transient unloading loose simulation experiment system for underground cavern structural plane

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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 an excavation transient unloading loose simulation experiment system for an underground cavern structural plane. The excavation transient unloading loose simulation experiment system comprises an excavated underground cavern surrounding-rock model containing the structural plane, a confining-pressure loading system, an experiment table, a loading device, an excavation cavern loading device and a monitoring system; the excavation cavern loading device comprises a level-type loading and unloading component which is fixed on the experiment table through a threaded rebar; the loading device comprises loading and unloading units respectively located on two sides of the level-type loading and unloading component, the loading and unloading unit comprises a hydraulic station, an oil cylinder, a steel bar, a disc-type electromagnet and a steel pipe; counterforce piers are arranged on two sides of the experiment table, and the bottom of the oil cylinder is in contact with the counterforce piers. By the arrangement, load on the excavated underground cavern surrounding-rock containing the structural plane is rapidly unloaded so as to solve the problem that high-speed unloading cannot be simulated in a previous experiment, great strain rate of the model is generated and is more consistent to the loading situation of a practical project, and more research values and reference significance are achieved.

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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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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