Model experiment device for simulating long-term ground subsidence in dense building complex area

Abstract

The invention relates to a model experiment apparatus for simulating ground long-term settlement of dense building group districts influenced by karst cave-underground river-tunnel group operation, and belongs to the technical fields of city underground engineering disaster prevention and disaster mitigation as well as ground settlement geological disaster. The model experiment apparatus comprisesa multi-model combination system, a karst stratum system, a tunnel system, a ground dense building group, a city underground river water circulation system, a karst cave water circulation system, a data acquisition system, a shock excitation, and a control system. The apparatus simulates influences of vehicle vibration load on ground long-term settlement during common operation of road tunnel group and subway tunnel in the dense building group district, simulates influences of tunnel group operating vehicle vibration load on soil long-term settlement under effects of city underground rivers,and simulates influences of tunnel group operating vehicle vibration load on soil long-term settlement under effects of karst caves. The apparatus has the characteristics of high environment simulation fidelity, accurate experiment data, and low experiment cost, and can be used for all-weather observation of slow deformation process of ground long-term settlement.

Description

technical field [0001] The invention belongs to the technical field of urban underground engineering disaster prevention and mitigation and land subsidence geological disasters, and in particular relates to a long-term ground subsidence model experimental device for simulating the impact of the operation of karst caves-underground rivers-tunnel groups in dense building complex areas. Background technique [0002] With the development of urban rail transit network construction, there are more and more superimposed urban subway tunnels and urban underground highway tunnels operating in my country's megacities. The urban dense building complex area has a large population and often integrates commerce, financial trade, and entertainment. It is a gathering point for urban people, and it is also an area where urban subway tunnels and urban underground highway tunnels are most frequently operated. Due to the long-term impact of subsidence of foundation soil caused by train vibratio...

AI Technical Summary

Problems solved by technology

This patent is mainly based on the two-dimensional finite element model to study the dynamic load of subway operating trains and the long-term settlement of tunnels. It does not involve the use of model tests to study the long-term ground settlement affected by the operation of karst caves-underground rivers-tunnel groups, nor does it consider dense buildings. Effects of groups on long-term land subsidence

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