Model test device for simulating micro-disturbance construction of shield near-grounding structure

Abstract

The invention relates to a model test device for simulating micro-disturbance construction of a shield near-grounding structure. A soil box module comprises a soil box body, a soil body is arranged in the soil box body, a pile foundation module and a tunnel module are buried in the soil body, a shield tunneling module cuts the soil body, and a propulsion control module is used for propelling the shield tunneling module; a grouting control module and a muck improvement module are used for injecting grouts and a muck improver, an underground water level control module is used for adjusting height of the underground water level in the soil box body, and a ground pressure loading module is used for adjusting pressure of the soil body; a data acquisition module comprises a data acquisition terminal and a sensor unit. Compared with the prior art, multiple modules are arranged, complex and diversified stratum conditions can be simulated, the construction disturbance influence of different shield parameters, propulsion parameters, grouting parameters and muck parameters on an underground structure can be considered, obtained data are closer to real construction data, and the accuracy is higher.

Description

technical field [0001] The invention relates to the field of shield tunneling construction of underground tunnels, in particular to a model test device for simulating micro-disturbance construction of shield tunnels near the ground. Background technique [0002] With the rapid development of urban public transportation in my country, urban rail transit is increasingly passing through existing underground structures such as pile foundations and tunnels, which will inevitably cause deformation of the surrounding soil during tunnel excavation, thereby inducing existing The deformation of the underground structure, when the deformation reaches a certain limit, will affect its safety and normal use, such as local damage caused by the stress concentration of the pile body, and the cracking and instability of the segment caused by the excessive internal force of the tunnel. Therefore, it is the core issue to ensure the safety of shield tunneling to evaluate the impact of shield exca...

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Problems solved by technology

However, in actual construction, the conditions of the soil are complex and diverse, and the stratum conditions that can be simulated in this patent are limited, and the obtained results cannot be used as an accurate basis for construction

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