Model pile body internal force rating device and method

Abstract

The invention discloses a model pile body internal force rating device and method. The model pile body internal force rating device comprises a vertical frame, wherein the bottom of the vertical frame is provided with an axial loading device; the axial loading device is provided with a model pile; the middle of the frame is provided with a horizontal loading device; loading sensors are arranged in the axial loading device and the horizontal loading device respectively; the model pile is provided with a strain sensor; the loading sensors and the strain sensor are connected with a control center through a strain collection instrument; the control center is in control connection with the axial loading device. According to the model pile body internal force rating device and method, the accurate axial loading is performed on the model pile through a small hydraulic jack and strain values of different positions of strain pieces of the model pile are measured to obtain the axial force rating coefficient between the strain of every strain piece and the axial force of a corresponding position of pile body; a concentrated load is applied to the middle section of the pile through a pulley and the strain difference of the strain pieces of the section of the model pile is measured to obtain the bending moment rating coefficient of the strain difference of the strain pieces and the bending moment of the section of the pile body; the internal force of the pile body can be accurately determined.

Description

technical field [0001] The invention relates to a device for measuring the internal force of a model pile during a pile foundation model test, in particular to a device and method for calibrating the internal force of a pile body. Background technique [0002] Pile foundation has great bearing capacity, stability and ability to coordinate uneven settlement, and has strong adaptability to different geological conditions. Although it has been widely used, there are still some problems to be further studied. Pile foundation model test is an effective and commonly used research method. In the indoor model test, the pile foundation is scaled down according to a certain model scale, and the performance of the pile is also scaled down. It is an important issue to accurately measure the stress of the pile. It is a commonly used method in model tests to calculate the internal force of piles by pasting strain gauges on model piles and using the deformation measured by strain gauges. ...

AI Technical Summary

Problems solved by technology

This method, on the one hand, cannot be realized with a set of equipment for determining the axial force, which increases the test cost. In addition, it is also different from the actual situation in which the model pile is multi-vertical installed to withstand the bending moment.

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