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System and method for simulating propelling and unloading in tunnel

A tunnel and horizontal technology, applied in the direction of applying stable tension/pressure to test the strength of materials, measuring devices, instruments, etc., can solve problems such as inability to fully restore the stress situation, and achieve the effect of reasonable underground space engineering construction

Pending Publication Date: 2018-12-18
SHANDONG UNIV OF SCI & TECH
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Problems solved by technology

However, in actual engineering, tunnel excavation is constantly advancing and has a certain time-space relationship, which also determines that the damage and stress evolution of the surrounding rock of the tunnel also have a time-space mechanism; power situation

Method used

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  • System and method for simulating propelling and unloading in tunnel
  • System and method for simulating propelling and unloading in tunnel
  • System and method for simulating propelling and unloading in tunnel

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Embodiment Construction

[0030] The present invention is specifically described below in conjunction with accompanying drawing:

[0031] combine Figure 1 to Figure 4 , a system for simulating tunnel propulsion and unloading, including the main frame of the system, the vertical loading unit, the left horizontal loading unit, the right horizontal loading unit, the lateral pressure baffle, the specimen pad, the stress-strain Chips, connecting wires, computer control devices and data acquisition devices.

[0032] The vertical direction loading unit is arranged above the main frame of the system, the left horizontal direction loading unit and the right horizontal direction loading unit are respectively arranged on the left and right sides of the system main frame, and the test piece pad is arranged on On the bottom edge of the main frame of the system; the vertical loading unit includes a vertical loading plate and a vertical hydraulic cylinder, the left horizontal loading unit includes a left lateral lo...

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Abstract

The invention provides a system and a method for simulating propelling and unloading in a tunnel, comprising a system main frame, a vertical direction loading unit, a horizontal direction loading unit, a lateral pressure bearing baffle, a test piece pad, a connecting line, a computer control apparatus and a data acquisition apparatus. The performance of synchronous loading and subregional unloading for a large-scale rock mass test piece is realized by controlling the vertical direction loading unit, the horizontal direction loading unit and the lateral pressure bearing baffle, thereby the condition of embedded depth and the process of excavating and propelling in the tunnel are effectively simulated; the computer control apparatus can not only quantitatively control the stress environmentwhere surrounding rocks in the tunnel are located, but also quantitatively simulate the excavating stress concentration and an unloading speed in the tunnel; and the data acquisition apparatus measures in real time the evolution characteristics of internal stress and displacements of the surrounding rocks in the tunnel. The system and the method provided by the application enables analogue simulation in a laboratory for propelling, excavating and unloading in a tunnel to possess a space-time concept, and is beneficial to assist researchers to better understand and grasp mechanisms of damagingsurrounding rocks a nd stress evolution induced by propelling, excavating and unloading processes in the tunnel.

Description

technical field [0001] The invention relates to the technical field of underground tunnel engineering safety and rock mass unloading experiments, in particular to a system and method for simulating tunnel advancing and unloading, in particular to an experimental system and an experimental system for simulating surrounding rock damage and stress evolution induced by tunnel advancing and unloading method. Background technique [0002] The 21st century is the century of underground space development, especially with the rapid development of cities and the excessive development of resources, it will inevitably bring about serious problems such as environmental pollution, energy shortage, traffic congestion and water shortage. Living space is needed underground to relieve the pressure brought about by the shortage of land resources. At present, the country is carrying out large-scale construction of urban underground space tunnel projects. The excavation of underground tunnels w...

Claims

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Application Information

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IPC IPC(8): G01N3/12G01N3/06
CPCG01N3/06G01N3/12G01N2203/0075G01N2203/0019G01N2203/0048G01N2203/0682G01N2203/0676G01N2203/0658
Inventor 张鑫孟凡宝王晓王昌祥孙熙震梁彦波庞达
Owner SHANDONG UNIV OF SCI & TECH
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