Experimental method for flexible retaining wall soil pressure model

A technology of earth pressure and retaining wall, applied in the direction of applying stable tension/pressure to test material strength, strength characteristics, measuring devices, etc., can solve the complex displacement mode of flexible retaining wall, theoretical calculation of earth pressure behind the wall and physical model It is difficult to realize the test, and it is difficult to accurately measure the objective change of the soil pressure distribution of the flexible retaining wall, so as to achieve the effect of saving materials, convenient operation and saving time

CN109030199AInactive Publication Date: 2018-12-18HUNAN INSTITUTE OF SCIENCE AND TECHNOLOGY +2
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2018-12-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to an experimental method for a flexible retaining wall soil pressure model. The experimental method comprises the specific steps that a teaching experimental system is manuallymounted, wherein the experimental system comprises a retaining wall model system, a displacement and soil pressure data acquisition system and a synchronous control system; soil samples are manually filled and compacted; the synchronous control system is operated to measure the change of the oil pressure of all parts of the wall back and soil displacement in real time while controlling movement ofa retaining wall model; and according to a sliding breaking surface generated by soil, a soil pressure calculation model is established, and a theoretical formula is deduced. According to the experimental method, equipment automatic control can be achieved, operation is convenient, the time and materials are saved, and the experimental efficiency is improved; various flexible retaining wall formsand displacement modes can be simulated; the change condition of a soil displacement field can be intuitively observed through a PIV system; the synchronous relation between the systems is established, and the change condition of the wall back soil pressure and soil displacement distribution of a flexible retaining wall in complex deformation and displacement processes can be observed synchronously; and the development and change processes of a soil plastic area behind the flexible retaining wall can be observed in real time.
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Description

technical field

[0001] The invention relates to the research on the earth pressure test of flexible retaining structures, in particular to provide an earth pressure model test method for flexible retaining walls. Background technique

[0002] According to the stress characteristics, the flexible retaining wall is mainly divided into four types: cantilever type, anchor type (free end support, fixed end support) and multi-support type. The earth pressure distribution on the back of the wall has three common characteristics: first, the flexible retaining wall There is a relative displacement between the wall and the filling, so that the earth pressure distribution is nonlinear; second, the overall displacement of the flexible retaining structure generally cannot make the soil reach the limit equilibrium state; third, the earth pressure distribution of the flexible retaining wall varies with the retaining structure. The displacement of the wall changes continuously, and it is di...