P-Y curve measuring device in pile-soil interaction shaking table test

Abstract

The invention relates to a P-Y curve measuring device in the pile-soil interaction shaking table test. The P-Y curve measuring device comprises a bearing pile body embedded into a test soil body in a model box. The model box is arranged on a shaking table. All test sections of the bearing pile body are connected with plain round steel bars perpendicular to the axis of the bearing pile body. Soil pressure meters are arranged on the connecting portions of the bearing pile body and the plain round steel bars. The other ends of the plain round steel bars penetrate through the side walls of the model box and then are connected with glass pieces with the smooth surfaces in a perpendicular mode. Acceleration meters are arranged in the test soil body beside the bearing pile body in a corresponding mode, arranged on the same height position as the plain round steel bars and used for measuring the accelerated speed of the test soil body. A fixing support parallel to the bearing pile body is arranged beside the model box and provided with a plurality of laser displacement meters, wherein emergence laser of the laser displacement meters is perpendicular to the corresponding glass pieces to measure the displacement of the bearing pile body.

Description

technical field [0001] The invention relates to a P-Y curve measuring device in a pile-soil interaction shaking table test, belonging to the field of pile-soil interaction. Background technique [0002] Pile foundation is a foundation form with a long history and is widely used. Pile foundations are often used in the construction of structural foundations such as high-rise buildings, offshore platforms and bridges. Therefore, the study of nonlinear pile-soil interaction has attracted more and more attention. There are three ways to study the pile-soil dynamic interaction. The first type is research based on field prototype tests. The field prototype test is relatively reliable, but the cost is too high, there are regional restrictions, and there is a certain degree of contingency in horizontal effects such as earthquakes; the second type is research based on finite element simulation. The finite element simulation has good repeatability and the conditions are easy to con...

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Problems solved by technology

[0005] However, these methods cannot take into account the influence of actual conditions such as the bending stiffness of the pile body, the shape of the pile section, and the boundary conditions of the pile top constraints. Y and earth pressure P are highly sensitive to the measured data, and have high precision requirements for the test data, so the calculated results are difficult to conform to reality

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