Earth pressure model test device for rigid retaining wall with limited soil mass

Abstract

The invention discloses a device for testing a limited soil mass rigid retaining wall soil pressure model. The device comprises a model box, loading systems, a retaining wall and a measuring system. Toughened glass is fixedly embedded in the side face of the model box, and a rigid cushion block is welded to a model box base plate. A reaction frame is arranged on the loaded side, and eight groups of clamping steel blocks are welded to a frame. The two loading systems which can work independently are installed on the reaction frame and connected with a movable retaining wall through a fixed hinge support, and fixed boundaries are installed on the specific clamping steel blocks according to the earth filling width requirements. A micro soil pressure box is embedded in the retaining wall, and a dial gage is installed at the rear of the movable retaining wall. A digital camera is placed in front of the side face of the model box. Different earth filling widths, wall soil contact surfaces and retaining wall displacement and shifting modes are simulated, changes of active or passive soil pressure are monitored, and a soil mass displacement field and slip crack faces are studied. According to the device for testing the limited soil mass rigid retaining wall soil pressure model, effective test data support can be provided for studying the soil pressure problems on the conditions of limited soil mass, and help is provided for a follow-up theoretical analysis model.

Description

technical field [0001] The invention relates to an earth pressure test device in geotechnical engineering, in particular to an earth pressure model test device under a rigid retaining wall with limited soil body with varying fill widths, which can be used to measure different displacement modes and displacements of retaining walls Active or passive earth pressure problems. Background technique [0002] In the actual engineering structures such as geotechnical retaining walls, such as foundation pit enclosure, bridge pier foundation and pile cap, active or passive earth pressure is very important. The classic Coulomb or Rankine earth pressure theory assumes that the soil behind the retaining wall is a semi-infinite body, but in reality, there are often adjacent retaining walls or bedrock surfaces, and the difference between the width and depth of the soil between the retaining walls The ratio is often small, and the soil in the active zone or passive zone no longer meets the...

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the deficiencies of the above-mentioned prior art, the present invention provides a limited soil body rigid retaining wall earth pressure model test device, which solves the problem of effectively and accurately controlling the displacement and displacement mode of the retaining wall, and the active or active measurement of different depth ranges in various states. Passive earth pressure, and determine the soil deformation and the development law of the slip surface, etc.

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