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Ground deformation test system for shallow excavation tunnel under operation highway

A deformation test, shallow burial and underground excavation technology, applied in soil material testing, material inspection products, etc., can solve the problems of deformation and damage of tunnel structure, large tunnel impact, etc., to optimize reinforcement parameters, and to achieve the effect of guiding design and construction

Active Publication Date: 2018-06-26
ZHEJIANG UNIV
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Problems solved by technology

For tunnels under the road constructed by the shallow buried excavation method, due to the shallow depth of the tunnel, the traffic load on the road surface has a greater impact on the tunnel, which is likely to cause deformation and damage to the tunnel structure

Method used

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  • Ground deformation test system for shallow excavation tunnel under operation highway
  • Ground deformation test system for shallow excavation tunnel under operation highway
  • Ground deformation test system for shallow excavation tunnel under operation highway

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Embodiment Construction

[0019] The present invention will be further elaborated below in conjunction with accompanying drawing and specific embodiment:

[0020] In order to clarify the law of surface subsidence and surrounding rock disturbance of shallow-buried and buried highway tunnels under traffic loads of different frequencies and sizes, a stratum deformation model for shallow-buried and buried highway tunnels under traffic loads is provided. The test system can realize this purpose through the combination of vertical simple harmonic loads of different sizes and frequencies by the servo loading device, monitoring the change of surface settlement, the change of contact stress of surrounding rock, and the change of acceleration and displacement of soil particles at the measuring point. like figure 1 The stratum deformation test system shown includes a highway tunnel simulation system, a traffic load simulation system, and a monitoring system.

[0021] The highway tunnel simulation system includes...

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Abstract

The invention relates to the field of a ground deformation test system for a shallow excavation tunnel and aims at providing a ground deformation test system for the shallow excavation tunnel under anoperation highway. The ground deformation test system of the shallow excavation subsurface tunnel under traffic load includes a highway tunnel simulation system, a traffic load simulation system anda monitoring system. According to the system, a servo loading device can be adopted to simulate the traffic load above the shallow excavation subsurface tunnel, and the surface settlement change, thechange of the surrounding rock contact stress and the change of acceleration and displacement of soil particles at a measurement point can be monitored by setting the vertical harmonic load combination of different sizes and frequencies to study the surface settlement law and the surrounding rock disturbance law, so as to further optimize the initial support and reinforcement parameters to guide design and construction.

Description

technical field [0001] The invention relates to the field of stratum deformation test systems for shallow-buried tunnels, in particular to a stratum deformation test system for shallow-buried tunnels under operating roads. Background technique [0002] The shallow burial and underground excavation method has the advantages of quick start and little impact on ground traffic, and has been widely used in tunnel excavation projects at home and abroad. For tunnels under the road constructed by the shallow buried excavation method, due to the shallow depth of the tunnel, the traffic load on the road surface has a greater impact on the tunnel, which is likely to cause deformation and damage to the tunnel structure. This problem has been widely concerned by the academic and engineering circles. [0003] The impact of traffic load on the road surface is mainly reflected in two aspects: land subsidence and surrounding rock disturbance. The ground subsidence can be directly observed b...

Claims

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Application Information

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IPC IPC(8): G01N33/24
CPCG01N33/24
Inventor 曹志刚范昌杰许斌严舒豪张志祥
Owner ZHEJIANG UNIV
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