A test device for pile-soil interaction with full-scale pile diameter

Abstract

The invention relates to a device for testing the interaction between a full-scale-pile-diameter pile and soil. The device comprises a model box bracket, a model box, a precast pile, spring components, a loading unit and a data acquisition unit, wherein the model box is fixed on the model box bracket; a testing soil body is arranged in the model box; the precast pile is perpendicular to the bottom surface of the model box and embedded in the testing soil body; openings matched in size with the precast pile are formed in the bottom surface of the model box and the top surface of the model box bracket, corresponding to the position where the precast pile is mounted; the precast pile moves up and down in the openings; the spring components are arranged at the bottom of the precast pile and connected with the bottom surface of the precast pile; the loading unit acts on the testing soil body in the model box and the upper surface of the precast pile; and the data acquisition unit is used for acquiring related data for representing the interaction between the pile and the soil. Compared with the prior art, the device provided by the invention has the advantage that when the full-scale-pile-diameter pile and the soil are subjected to the upper load, change rules of the stress in the pile as well as change rules of the soil pressure, the water pressure and the settling volume of the soil around the pile can be effectively researched.

Description

technical field [0001] The invention relates to a pile-soil interaction test device, in particular to a pile-soil interaction test device with a full-scale pile diameter. Background technique [0002] Pile foundations are widely used in foundation projects such as high-rise buildings, railway bridges, nuclear power plants, large-scale power machinery foundations, wharves and offshore platforms due to their large bearing capacity, good stability, small settlement, and adaptability to various geological conditions and load conditions. Especially when the load of the superstructure is complex and huge, and the state of the shallow soil layer is not good, the pile foundation becomes the primary consideration of the designer. However, due to the complexity of the pile-soil mechanical behavior caused by the difference of the pile-soil and the upper load, there are still many problems that have not been completely resolved. Therefore, indoor pile-soil physical model test is the mo...

AI Technical Summary

Problems solved by technology

Indoor scaled-down model test, the size is small, the test material is more operable and device-friendly, and the data available for analysis is relatively complete and comprehensive, but because the size is too small, it cannot be compared with the real pile-soil. Interactions are much different

On-site full-scale tests are generally engineering test piles, but due to the limitations of high cost, long test period, difficulty in controlling influencing parameters, and test site conditions, it is difficult to conduct device research on soil-pile interaction dynamics. It is very necessary to have a test device that can simulate the full-scale and cost-effective pile-soil interaction to the greatest extent.

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