Multi-pile-foundation simulation testing box

Abstract

The invention provides a multi-pile-foundation simulation testing box which comprises a box body, a testing pile arranged in the box body, testing soil covering the testing pile and a sand cushion layer covering the testing soil. A partition plate and a bottom plate under the partition plate are arranged at the bottom of the box body, a through hole is formed in the partition plate, pressure sensors are arranged on the lateral wall of the box body and the partition plate, the testing pile is arranged on the partition plate through the through hole formed in the partition plate, the testing pile is connected with the bottom plate through a supporting spring, an optical fiber sensor is arranged in the axial direction of the testing pile, and a flexible loader is arranged above the sand cushion layer. Multi-pile-foundation stress analysis can be carried out through variable parameters like frictional resistance coefficients between the pile and the soil in the situation of various pile-soil interface parameters. Advantages and characteristics of all pile types can be fully brought into play in the actual application according to testing results, foundation bearing force is remarkably improved, and foundation sedimentation is reduced.

Description

technical field [0001] The invention relates to the technical field of construction, in particular to a multi-element pile foundation simulation test box. Background technique [0002] Over the past ten years, composite foundation treatment technology has been greatly developed. The latest development of ground treatment technology is not only reflected in the continuous development of machinery, materials, design theory, construction technology, on-site monitoring technology and new ground treatment methods, but also in the comprehensive application of various ground treatment methods. The depth of foreign offshore mixing piles has reached 70M below sea level, and the depth of land reinforcement has also reached 40M. However, since my country put into mass production in 1984, the reinforcement depth of mixing piles is generally about 15M, and there was a view that "deep mixing piles are flexible piles, and their effective pile length can only reach 15M", but after a lot of...

AI Technical Summary

Problems solved by technology

However, the indoor model test and on-site full-scale test of the multi-component composite foundation have not been reported so far, especially the piles in the multi-component composite foundation, the law of soil load transfer, the mechanism and analysis method of the joint action of pile-soil-cushion-cap, The impact of pile type and pile layout on the bearing properties and settlement of multi-component composite foundations needs to be further studied.

Images