An earth pressure test demonstration system and method

Abstract

The invention discloses an earth pressure test demonstration system, which comprises a soil box to be tested, and the soil box to be tested is divided into a first cavity and a second cavity by a vertical partition; the inside of the first cavity is close to the partition One side of the vertical force-measuring support plate is provided, and the other side of the force-measuring support plate relative to the partition is fixed with a plurality of force-measuring rigid blocks at intervals, and one end of each force-measuring rigid block is connected to the force-measuring support plate fixed, the other end is fixed with a retaining wall block, the retaining wall block is vertically stacked and extended to the bottom of the box, the force measuring rigid block is provided with a strain gauge; the second cavity is provided with a motor, a force rod and displacement sensor, the force rod passes through the diaphragm linkage motor and the force-measuring support plate, the displacement sensor is connected to the force-measuring support plate; The space to be tested is filled with the soil to be tested, and the demonstration method of the system is also disclosed. The system can visually demonstrate the macroscopic response under different states in the earth pressure theory.

Description

technical field [0001] The invention relates to the field of earth pressure testing, in particular to an earth pressure testing demonstration system and method. Background technique [0002] The theory of earth pressure is an important content in "Soil Mechanics". The earth pressure theory is the application theory of the shear strength of the soil in the actual engineering of the retaining wall. The widely used engineering is the Rankine earth pressure theory and the Coulomb earth pressure theory. Using these theories, it can be used to analyze the pressure on the retaining wall, So as to carry out the design of the retaining wall and so on. From a theoretical point of view, there is a certain relationship between the pressure on the retaining wall and its displacement (deformation or bending). According to the relative displacement between the original soil and the retaining wall, the soil can be divided into active earth pressure state, static earth pressure state and p...

AI Technical Summary

Problems solved by technology

These concepts are relatively abstract. Through the teaching method of lectures, students cannot better accept the internal relationship between these states and the mechanical properties of the soil (such as the internal friction angle of the soil, cohesion, etc.), and cannot better allow students to intuitively Accept the connection between these states and the macroscopic phenomena such as land subsidence and cracks produced by the actual soil

Images