Earth arch test apparatus

Abstract

The invention discloses a soil arching tester which aims at realizing the direct reappearance of soil arching and can validate the soil arching through the testing of soil pressure before arching. The soil arching tester comprises a tank body (10), arch spring model columns (11), a pressurization device and a force measuring device; the tank body (10) is provided with an upper port and a lower port; two arch spring model columns (11) are alternately arranged on the lower port of the tank body (10); the pressurization device is arranged on the upper part of the upper port of the tank body (10); and the lower part of the lower port of the tank body (10) is provided with a dropping space (14) for the soil before arching. The soil arching tester has the advantages that: the soil arching tester can realize the direct reappearance of the soil arching, can directly measure the height and the span of the arch and draw the arch form and obtain the arch axis through the calculation; and throughthe measurement of the pressure distribution of the soil before arching, the soil arching tester determines the existence and the influencing factors of the soil arching, determines the span of the arch, has a simple structure and can conveniently carry out the soil arching tests of various soils.

Description

technical field [0001] The invention relates to a soil arch tester, in particular to a soil arch tester mainly used for the soil arch test between anti-slide piles. Background technique [0002] Soil arch refers to the arch formed inside the soil after it bears a certain pressure. The nature of the arch is determined by the physical and mechanical properties of the soil itself. The formation of the soil arch changes the stress state in the soil, causes the stress to redistribute, and transmits the pressure acting on the arch to the arch foot and the surrounding stable medium. The geometric and mechanical properties of the soil arch and the arch directly affect or even determine the design parameters of the reinforced structure. The distribution of force is determined by the nature of the soil arch between the piles. Therefore, it is particularly important to reproduce the soil arch in a specific engineering environment by means of experiments, and to clarify the nature of ...

AI Technical Summary

Problems solved by technology

But at present, there are no good test methods and test equipment for soil arches reported. The main reason is that they do not have the mechanical and spatial conditions of soil arches. The details are as follows: (1) In actual reinforcement projects, generally soil In this way, the soil before the arch will not be removed, and the soil arch cannot be observed in the actual project, so there are few field tests of the soil arch at present; (2) In the model test, most experimenters pursue the model and the field practice The situation is similar, and the potential movement direction of the soil is set to be consistent with the site. Since the model is small, the weight of the soil before the arch is small, but the friction force it receives is relatively large, and the soil arch before the arch still does not have removed conditions, so there are few conventional physical model tests of soil arches reported

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