Model test device for simulating long-term land subsidence in highly-dense area under complex vibration environment

Abstract

The invention provides a model test device for simulating the long-term land subsidence in a highly-dense area under a complex vibration environment, and belongs to the technical field of urban underground engineering disaster prevention and reduction and land subsidence geological disasters. The model test device for simulating the long-term land subsidence in a highly-dense area under a complexvibration environment includes a model box, a stratum system, a tunnel system, a high-speed railway roadbed system, a vibration excitation system, a sensing system, a ground dense building group, a high-speed rotating system, and a karst cave system. The device can simulate the long-term land subsidence caused by the joint vibration of subways and high-speed railways in a dense building group area, can accurately simulate the long-term land subsidence under the effect of high-speed rotating centrifugal force in a complex environment, can quantitatively monitor the influence of the reinforcement of existing karst caves over and under an operating tunnel on the long-term land subsidence, and is low in experimental cost and reliable in data.

Description

technical field [0001] The invention belongs to the technical field of urban underground engineering disaster prevention and reduction and land subsidence geological disasters, and in particular relates to a long-term ground subsidence model test device for simulating complex vibration environments in high-density areas. Background technique [0002] In recent years, my country's high-speed railway construction and urban subway construction have developed rapidly, and their operating mileage ranks first in the world. Especially, Shanghai, Hangzhou, Nanjing in the Yangtze River Delta region, and Guangzhou and Shenzhen in the Pearl River Delta region are all soft soil areas. These cities have the most developed productivity, the strongest economic growth, the densest population, and the largest distribution of dense building groups. During the operation of high-speed railways and urban subways, the subsidence of foundation soil caused by the vibration load of trains, and the unf...

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 tunnels. It does not consider the influence of karst strata in the stratum simulation, does not involve the use of model tests to carry out long-term ground subsidence research, and does not consider high-density buildings. The research on the long-term ground subsidence induced by high-speed rail and subway vibration loads has not involved

Images