Experiment model and method for simulating differential settlement of foundation based on air bag method

Abstract

The invention discloses an experiment model for simulating differential settlement of a foundation based on an air bag method. The experiment model comprises a model box with an opening in the upper end and is characterized in that a base frame is arranged at the bottom of a cavity of the model box, the base frame is composed of partition plates, the partition plates are lattices, and prefabricated plates are arranged in the lattices; air bags are arranged below the prefabricated plates and connected with an air pump system. An experiment method comprises the steps that a, the model box is established; b, the base frame is arranged; c, the air bags and the prefabricated plates are arranged; d, a foundation layer is filled up; e, an upper engineering structure layer is constructed; f, foundation settlement is simulated; g, data collection and analysis are carried out. According to the experiment model and method, the air bags can drive the prefabricated plates in the corresponding lattices to ascend and descend, simulation of multi-point differential settlement of the foundation layer is realized, analysis of the law of multi-point differential settlement of the foundation is realized by collecting and analyzing the data output by sensors, and the experiment model and method have the advantages that the simulation effect is good, cost is low, and repeatable experiment performance is high.

Description

technical field [0001] The invention relates to a test model and method for simulating uneven settlement of foundation, more specifically, to a test model and method for simulating uneven settlement of foundation by using the contraction and expansion of airbags. Background technique [0002] Affected by multiple factors such as external loads, temperature, water, etc., structures such as road and railway subgrades and building buildings are prone to diseases of uneven foundation settlement. The mechanism and prevention of uneven foundation settlement can be achieved through theoretical calculations, numerical simulations, model tests, Field testing and other methods for research. Among them, the model test is to restore the engineering structure in scale, which can realize the monitoring, multi-condition control and repeatability of the deformation of the simulated object. It is an effective means to study the deformation of the engineering structure. Force and deformation...

AI Technical Summary

Problems solved by technology

The model box is a common equipment for scale model testing. The current model box adopts the model making method of paving the foundation soil in layers, which cannot simulate the subsidence deformation of the underlying foundation soil, and cannot realize the simulation of uneven settlement.

Theoretical calculation and numerical simulation can reflect the changing law of foundation force and deformation to a certain extent, but the error with the actual situation is large, and the accuracy needs to be improved. Although the field test can most intuitively reflect the problem of uneven settlement, the cost is high and it is difficult to carry out multi-influence Repeated tests under factor control and model tests have both advantages, so it is of high engineering value to develop a test model that can simulate uneven settlement of the foundation

Images