Measuring device for p-y curve in pile-soil interaction shaking table test

Abstract

The invention relates to a P-Y curve measuring device in a pile-soil interaction shaking table test, comprising a load-bearing pile body pre-buried in the test soil in a model box, the model box is arranged on a vibration table, and the load-bearing pile body Each test section is connected with a smooth round steel bar perpendicular to its axis. An earth pressure gauge is installed at the connection between the bearing pile body and the smooth round steel bar. The other end of the smooth round steel bar penetrates the side wall of the model box and is vertically connected with a surface A flat glass sheet, the test soil on the side of the load-bearing pile is correspondingly provided with an accelerometer at the same height as the light round steel bar to measure the acceleration of the test soil, and the side of the model box is provided with an accelerometer parallel to the load-bearing pile. The fixed frame is provided with several laser displacement gauges that emit laser light perpendicular to the corresponding glass sheet 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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