Experimental method for flexible retaining wall soil pressure model

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.

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...

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Problems solved by technology

[0003] The displacement modes of various structural types of flexible retaining walls are relatively complex, and the theoretical calculation of the earth pressure behind the wall and the physical model test are difficult to realize

Among the displacement modes of various structural types, the theoretical calculation method of the anchored retaining wall structure (drum-shaped displacement mode) supported only by

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