Centrifugal model testing system and method studying common character of composite foundation and support structure

Abstract

The invention discloses a centrifugal model testing system and method studying the common character of a composite foundation and a support structure. The centrifugal model testing system comprises a model box. Foundation soil is arranged in the model box. A support plate used for simulating a support pile is vertically embedded in the foundation soil. A plurality of foundation pile model piles are vertically arranged on one side of the support plate in the model box. A cushion layer is arranged on the top of the foundation soil in which the foundation pile model piles are embedded. The composite foundation is jointly formed by the foundation soil, the foundation pile model piles and the cushion layer. A digging area used for simulating digging is arranged on the other side of the support plate. Testing devices connected with a computer are distributed on the foundation pile model piles and the support plate. A load pressurizing device is arranged at the upper portion of the composite foundation. The whole testing system can be provided with a test system according to the requirements, and the test system is used for testing deformation displacement data and the like of the foundation soil in the composite foundation when a foundation pit is dug. When digging is conducted in the digging area, changes of force or displacement of the composite foundation or the support structure are studied, and practices can be better guided accordingly.

Description

technical field [0001] The invention relates to a foundation model test, in particular to a centrifugal model test system and a test method for studying common properties of a composite foundation and a supporting structure. Background technique [0002] Traditional geotechnical engineering laboratory tests are carried out under constant gravity conditions. Since it is impossible or difficult to reproduce the actual size conditions on site, it is often a scaled model. According to the self-weight stress of the soil, the scaled model brings the soil depth h The shrinkage, and then change the stress field of the soil self-weight, for the structure with self-weight as the main load, it cannot reflect the stress state of the prototype, so that the model test cannot simulate the phenomenon that occurs in the prototype. [0003] The geotechnical centrifugal model test can truly simulate the existence of the gravity field and reproduce the actual stress state of the project. It is ...

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Problems solved by technology

[0006] To sum up, with the large scale and complexity of underground engineering, the previous practice of relying on engineering experience will not meet the design and construction requirements. The centrifugal model test of foundation pit engineering can effectively study the problems of foundation pit engineering and promote the improvement of foundation pit engineering. Perfection of theory and numerical simulations

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