Device for testing surface collapse caused by urban underground pipeline leakage

Abstract

The invention provides a device for testing surface collapse caused by urban underground pipeline leakage and belongs to the technical field of surface collapse test devices. The test device comprises soil, an underground pipeline, a surface collapse analog model case, a flow meter and a water box for filtering loss soil particles; the surface collapse analog model case is filled with the soil, and the underground pipeline is buried into the soil in the surface collapse analog model case; the water box for filtering the loss soil particles is divided into four parallel grids by three filtration separation plates, the four parts are communicated, and a submerged pump is arranged in the first grid of the water box for filtering the loss soil particles and connected with a water inlet end of the underground pipeline; an underground pipeline outlet is formed in the position, corresponding to the side surface of the surface collapse analog model case, of a water outlet end of the underground pipeline, and the water outlet end of the underground pipeline passes by the flow meter and is connected with the fourth grid of the water box for filtering loss soil particles by a transparent steel wire pipe; the submerged pump is connected with a frequency converter. The device can be used for testing surface collapse caused by urban underground pipeline leakage.

Description

technical field [0001] The invention relates to a physical model test device that can be used for underground engineering such as subway excavation and urban municipal engineering construction, especially a test platform that can comprehensively simulate urban ground subsidence, especially a kind of urban underground pipeline leakage A test device for inducing ground subsidence belongs to the technical field of ground subsidence test devices. technical background [0002] Physical model test is an important means to study the safety prevention and control of urban underground space. It is widely used at home and abroad, and plays an important role in engineering research and design. Scholars at home and abroad have conducted fruitful research on ground subsidence problems caused by urban subway tunnel excavation and municipal engineering construction, and have developed model test equipment of different scales and uses. [0003] At present, with the rapid development of urb...

AI Technical Summary

Problems solved by technology

[0004] The geometric similarity ratio of the physical model test is a key technical indicator. If the geometric similarity ratio is too small, although it can save test materials and facilitate operation, the too small model size will limit the layout of pipelines, and it is easier to operate in a narrow space. Interference by external factors, thus affecting the test accuracy

Therefore, when conditions permit, a larger model geometric similarity ratio should be used as much as possible, which increases the difficulty of the model test process.

Images