Layered shear model box for centrifuge shaking table test

Abstract

The invention discloses a layered shear model box for a centrifuge shaking table test. The shear box is formed by sequentially overlapping a first layer to a twelfth layer of equal-thickness hollow rectangular aluminum alloy shear frames from top to bottom, eleven upper layers are movable layers, the lowest layer is a fixed layer fixed onto a gland plate connected with a bottom plate, rolling grooves are arranged among the layers in the length direction, rolling shafts are placed in each rolling groove, horizontal displacement sensors mounted on displacement sensor clamps are arranged on two sides of each of the eleven upper layers in the length direction, metal steel sheets are mounted on two sides of each of the eleven upper layers in the width direction, a rubber washer is arranged between the gland plate and the bottom plate, a rubber membrane is mounted on the inner side of the shear box, the bottom end of the rubber membrane is connected with the washer inlaid between the lowest layer of shear frame and the bottom plate, a drainage system is arranged in the bottom plate of the shear box, and the bottom plate is fixed onto a shaking table in the test. The layered shear model box is capable of simulating the action of soil bodies on a semi-infinite site through a model of a finite size, and is light in weight, simple in structure and convenient in installation and application.

Description

technical field [0001] The invention relates to a shearing device for civil engineering, in particular to a layered shearing model box for a centrifuge shaking table test. Background technique [0002] Under natural conditions, the soil in the site has no boundary constraints, but in the centrifuge shaking table model test, usually only a model box with a limited size can be used to hold the model soil. In order to eliminate the artificial boundary effect and reasonably simulate the input of seismic energy, the model box is designed to be capable of unidirectional layered shear deformation under earthquake action. Such a model box is usually called a layered shear model box. However, at present, some layered shear model devices in China are difficult to reflect the dynamic response of the soil under the condition of earthquakes in the test, and it is difficult to control the saturation, consolidation, and drainage processes of the simulated soil samples, so there are relativ...

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Problems solved by technology

However, at present, some layered shear model devices in China are difficult to reflect the dynamic response of the soil under the condition of earthquakes in the test, and it is difficult to control the saturation, consolidation, and drainage processes of the simulated soil samples, so there are relatively large limitations in application. sex

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