Model experimental device for simulating long-term ground subsidence in high-density urban areas

Abstract

The invention provides a model experimental device for simulating long-term land subsidence in a high-density area of a city under the condition of coupled train vibration and construction load, belonging to the technical fields of disaster prevention and disaster mitigation of urban underground engineering and the geological disaster of land subsidence. The model experimental device provided by the invention comprises a combined model system, a soil layer system, an excitation system, a sensing system, a propulsion system, a pressurization system, a land surface dense building system, a pipegallery system and a tunnel system. The model experimental device can quantitatively and accurately simulate the long-term land subsidence in a high-density building group area induced by the coupledeffect of the vibration load of metro operating vehicles and tunnel construction load; the device can accurately simulate the long-term subsidence of soil induced by the operation of pipe galleries under the high-density building group area; and the device has the characteristics of high environmental simulation fidelity, can observe the slow deformation process of long-term land subsidence all day long and accurately simulate long-term land subsidence caused by the reciprocating vibration of trains in tunnels, and is accurate and reliable in experimental data and low in experimental cost.

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 in urban high-density areas under the coupling of simulated train vibration and construction load. Background technique [0002] A high-density urban area is the commercial center, financial trade center, entertainment center, and cultural center of the entire city. It is the gathering point for urban people, and it is often the area where subway operations are most concentrated. After the subway has been in operation for a period of time, due to the subsidence of the foundation soil caused by the vibration load of the train, the unfinished consolidation deformation of the foundation soil during the tunnel construction period, the dense buildings (structures) in the vicinity of the tunnel, and the change of the ground...

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 trains and the long-term settlement of the tunnel. It does not involve the use of model tests to study the long-term ground settlement, does not consider the impact of high-density buildings on the ground, and does not consider train vibration and Long-term Ground Subsidence Induced by Construction Load Coupling

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