Self-balancing type multi-loading-path one-way shearing box for pile-soil test

Abstract

The invention discloses a self-balancing type multi-loading-path one-way shearing box for a pile-soil test and belongs to the technical field of geotechnical engineering tests. A loading part of the device can change positions to apply static or quasi-static loads such as pulling, pressing and pushing under different loading paths, soil stress diffusion and attenuation can be simulated through a semi-shearing device, and the influence of boundary conditions is reduced so as to achieve the purpose of reducing the size of the model. The device is composed of a reaction frame, a loading device, an angle steel model box and the semi-shearing device. The model box is used for bearing piles and soil and is a main place for pile-soil interaction. The one-way shearing device realizes the one-way shearing of a soil body, unifies experimental boundary conditions and actual boundary conditions, reduces the size of the model while improving the test reliability, and reduces financial and materialresource consumption. The reaction frame and the loading device are used for applying loads, multiple combination modes are achieved, the loading position and angle can be adjusted, and the multi-pathloading can be achieved.

Description

technical field [0001] The invention relates to the field of civil engineering model tests, and designs a self-balancing one-way shear box that can approximate real boundary conditions and can realize multi-path loading in pile-soil interaction tests. Background technique [0002] Pile-soil interaction test is an important field of civil engineering research. However, due to the large size of the test object, loading is difficult, manpower and material resources are consumed, and in-situ experiments are difficult to achieve most of the time. Therefore, small model tests Be the first choice for obtaining relevant data. [0003] In the pile-soil interaction test, a load-bearing container is generally designed, and various loads are applied after the test object and soil are loaded into the container for testing. In terms of load frequency, it is generally divided into two types: dynamic and static (including quasi-static) tests. The typical dynamic test is the pile-soil inter...

AI Technical Summary

Problems solved by technology

In the static (pseudo-static) test, the interlayer shear box cannot be used, and the angle steel box is generally used, that is, the boundary condition of the soil is limited to rigidity, which is inconsistent with the actual condition and will seriously affect the pile-soil interaction. Stress diffusion and attenuation in the body, resulting in the inability to obtain accurate experimental results

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