Model experimental device for long-term ground subsidence caused by operation of overlapping tunnels in high-density areas

Abstract

The invention relates to a model experiment apparatus for simulating ground long-term settlement due to overlapped tunnel operation in a high compact district under earthquake-rainfall effects, and belongs to the technical field of city underground engineering disaster prevention and disaster mitigation as well as ground settlement geological disaster. The model experiment apparatus comprises thefollowing components: a rainfall simulation system, an earthquake simulation system, a combined module system, an earth surface compact building system, soft soil, a lonestone group, a sensing system,a tunnel system, a conduction system, a vehicle vibration system, and a central control system. The apparatus can simulate influences due to long-term settlement of ground under extreme rainfall environment, earthquake disaster environment, and effects of rainfall environment, earthquake environment, and combination environments of rainfall and earthquake; the apparatus can simulate influences ofvehicle load vibration coupling effects at any positions during subway operation in a city high compact district on soil long-term settlement, and the apparatus has the characteristics of high environment simulation fidelity and experiment repeatability; the experiment is not limited by extreme environment, and has the characteristics of reliable data and high operationality.

Description

technical field [0001] The invention belongs to the technical field of urban underground engineering disaster prevention and mitigation and ground subsidence geological disasters, and in particular relates to a model experiment device for simulating long-term ground subsidence caused by operation of overlapping tunnels in high-density areas under the action of earthquakes and rainfall. Background technique [0002] Many megacities in my country are located in earthquake-prone areas. The high-density areas in megacities are the commercial center, financial trade center, entertainment center, and cultural center of the entire city. Casualties and property losses were extremely serious. The earthquake was accompanied by heavy rainfall, and flood disasters may occur after the earthquake. However, the underground transportation network in the high-density urban area is developed, and the tunnels overlap and cross at close distances. Due to the long-term vibration load of the train...

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 impact of the combined effect of earthquake and rainfall on the long-term ground settlement, nor does it consider the overlapping of high-density areas. Influence of Tunnel Operation on Long-term Ground Subsidence

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