Two-dimensional retaining structure soil pressure and displacement visualization testing system

Abstract

The invention discloses a two-dimensional retaining structure soil pressure and displacement visualization testing system. The two-dimensional retaining structure soil pressure and displacement visualization testing system comprises an outer frame, a retaining structure force measurement plate with a multipoint load detection function is arranged in the outer frame, a retaining structure displacement control assembly is arranged between one side of the retaining structure force measurement plate and the outer frame, and a rectangular stuffing box is formed by the other side of the retaining structure force measurement plate and the outer frame. Simulation sandy soil with a macroscopic plane stress-strain characteristic simulation function for sandy soil is arranged in the rectangular stuffing box, a loading assembly is arranged on the upper portion of the rectangular stuffing box, and shooting-lighting systems and a shooting device are further arranged in front of the outer frame. The value and distribution of soil pressure of multiple measured points on the same vertical section can be measured simultaneously, the action of side friction can be accurately eliminated by adopting the two-dimensional simulation sandy soil as stuffing, and the position of a slipping crack surface is visually showed. The two-dimensional retaining structure soil pressure and displacement visualization testing system is high in reliability and repeatability and is a new testing system provided for soil pressure study.

Description

technical field [0001] The invention relates to a teaching demonstration and model test device, in particular to a two-dimensional test system for earth pressure and displacement visualization of retaining structures. Background technique [0002] Earth pressure of retaining structures has always been a hot issue in soil mechanics research. Rankine earth pressure and Coulomb earth pressure are widely used in practical engineering because of their simple formulas and strong adaptability. The current earth pressure theory believes that the retaining structure is moving away from or towards the soil. When the limit equilibrium state is reached, a linear slip surface appears inside the soil, which are called the active and passive limit equilibrium states respectively. According to the soil unit The Mohr-Coulomb strength theory or the establishment of the wedge sliding surface limit equilibrium equation deduce the earth pressure of the retaining wall structure under the limit eq...

AI Technical Summary

Problems solved by technology

The change of relative density of sand and soil during the test cannot be effectively solved, and the test accuracy is limited

[0007]3. The analyzer does not involve the filling displacement test, the identification of the slip surface and the simulation of the loading of the fill behind the wall

Images