Mining tunnel simulation construction method considering red clay unloading influence

Abstract

The invention discloses a mining tunnel simulation construction method considering red clay unloading influence. The mining tunnel simulation construction method comprises the following steps of building a soil body model used for building a double-side-wall pilot tunnel; specifying a tunnel position on the basis of the soil body model, generating a tunnel model, and determining an unloading influence area range; performing mesh generation on the model; simulating construction in the soil body model according to a tunnel structure, and excavating a soil body to complete tunnel construction; monitoring stress changes of red clay on the lower portion of the tunnel in real time in the soil body excavation process; calculating the red clay unloading expansion rate of soil body unloading causedby tunnel excavation; and analyzing the influence of red clay body unloading expansion on the tunnel structure and the surface environment around the tunnel in the tunnel excavation process. The method has the beneficial effects that the interaction of the soil body and the structure can be more practically simulated, reference is provided for tunnel excavation construction in the red clay area,and follow-up of subsequent treatment measures is facilitated.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering, in particular to a mine method tunnel simulation construction method considering the influence of red clay unloading. [0002] technical background [0003] The characteristics of urban underground engineering construction are complex geological conditions, dense underground pipe network, numerous buildings on the ground, significant adjacent disturbance, complex underground engineering construction technology, long cycle, large investment, many unforeseen risk factors, and great impact on the social environment. Unavoidable high-risk construction projects. The urban underground pipe network is an "invisible" world, which is closely related to the lives of citizens. It is an important network that citizens can feel personally, and it is the bones and blood vessels of modern cities. [0004] Red clay is a kind of brownish-red or brownish-yellow special soil that generally covers t...

AI Technical Summary

Problems solved by technology

However, at present, there are few achievements in observing the expansion and contraction of red clay during the decompression process after the expansion and contraction of red clay are stabilized under the inherent pressure.

Similarly, at the present stage, for the numerical simulation research of actual tunnel engineering under the condition of soil expansion and contraction, the temperature field is mostly used to simulate the seepage field, and the damage of the tunnel lining of the expansive soil under the condition of humidification is considered. The impact of engineering is less

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