Model test system and method for foundation pit construction stability research under influence of rainfall

Abstract

The invention discloses a model test system and method for foundation pit construction stability research under influence of rainfall. The system comprises a foundation pit model system, a rainfall simulation system, a monitoring system and a BIM information management system, wherein the foundation pit model system comprises a test box, a foundation pit similar rock-soil layer, foam and a water accumulation box; the rainfall simulation system comprises a water tank, a water pump, a water guide pipe, a valve, a water flowmeter and a top water pipe; and the monitoring system comprises a micro accelerometer, a micro soil pressure meter, a strain gauge, a dial indicator, a high-speed camera and a full-automatic total station. The model test system and method can simulate models during foundation pit excavation under different rainfall amounts, simply and effectively monitor stability changes of a foundation pit and a side slope under the effect of rainfall, achieve dynamic measurement ofdata such as acceleration, soil pressure, strain and displacement of the foundation pit side slope and surrounding rock-soil bodies in the rainfall process, and provide a test basis and a research method for foundation pit stability evaluation in the foundation pit construction process under the effect of rainfall.

Description

technical field [0001] The invention relates to the field of BIM-based technology and foundation pit slope stability research, and more specifically, relates to a model test system and method for researching the stability of foundation pit construction process under the influence of rainfall based on BIM technology. Background technique [0002] With the development of urban construction, foundation pit engineering can be seen everywhere in urban construction, so it is very important to study the stability of foundation pits. In the process of foundation pit excavation, foundation pit slope instability is a relatively common engineering accident. A large number of statistics show that there are many reasons for slope instability. Rainfall, especially heavy rainstorms, is the cause of foundation pit slope instability. One of the important predisposing factors of instability. Therefore, in foundation pit engineering, the stability of foundation pit slope under the influence o...

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Problems solved by technology

[0003] At present, a series of model tests and field tests on the rainfall in foundation pits have been carried out at home and abroad. Most of them are aimed at foundation pits that have been basically exc

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