Testing method for simulating mechanical behaviors of surrounding underground pipelines in construction of shield tunnel

Abstract

A testing method for simulating the mechanical behaviors of surrounding underground pipelines in the construction of a shield tunnel belongs to the field of construction protection of tunnel engineering and subway engineering, and aims to solve the problem that displacement of surrounding soil is caused by stratum loss in the construction process of a shield tunnel in a soft soil area, which can change the mechanical behaviors of surrounding underground pipelines or even causes disasters such as pipeline deformation and explosion. The testing method comprises the following steps: similar designing of a shield tunnel, underground pipelines and a stratum system; simulation of a shield tunnel construction process accompanied with stratum loss by virtue of a device for simulating shield tunnel construction accompanied with stratum loss; laying of underground pipeline measuring elements, and data acquisition and analysis; and model laying and mounting. By the testing method provided by the invention, model tests can be performed under various construction conditions, which is of great significance in further understanding the disaster mechanism of the underground pipelines and building a simplified calculation method for the mechanical behaviors of the underground pipelines. The testing method has wide application prospects in the fields of engineering technology research and tunnel engineering construction protection.

Description

technical field [0001] The invention relates to a test method for simulating the mechanical behavior of underground pipelines around shield tunnel construction, belonging to the field of tunnel engineering and subway engineering construction protection. Background technique [0002] At present, the problem of urban traffic congestion has become an important bottleneck restricting the process of urbanization in my country. Urban subways have become an important way to solve the problem of urban traffic congestion due to their advantages such as fast transportation speed, large transportation volume, and little influence from weather. In the construction of underground subway projects in cities, it is inevitable to encounter the problem that the existing pipelines are within the influence of shield tunnel construction. Due to the ground loss during the construction of the shield tunnel will cause the deformation of the surrounding soil layer, the existing pipeline will generat...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a test method for simulating the mechanical behavior of underground pipelines around the construction of shield tunnels. The present invention aims at the displacement of surrounding soil layers caused by stratum loss during the construction of shield tunnels in soft soil areas, which in turn causes the mechanical behavior of surrounding underground pipelines. In severe cases, it will cause disasters such as pipeline deformation and bursting

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