Test device and method for simulating foundation pit passive area reinforcement

Abstract

The invention discloses a test device and method for simulating foundation pit passive area reinforcement. The test device comprises a test box, a supporting component, a reinforcing component and a test unit, wherein the test box can simulate a soil body structure; the supporting component can apply or remove prestress to a soil body; the reinforcing component can achieve foundation pit passive area soil body reinforcement; and the test unit is arranged on the surface of backfill soil, the surface of a retaining wall and the supporting component and used for monitoring surface settlement, lateral displacement of the retaining wall, the soil pressure change situation of the two sides of the retaining wall in the excavation process and stress strain of the retaining wall and the supportingcomponent. The soil body excavation and bracing process after foundation pit passive area reinforcement can be simulated, the supporting effect of an inner support and the passive area reinforcement efficiency can be well simulated, and the supporting structure and the foundation pit surrounding environment stress and deformation situation are obtained through monitoring. The test device is simplein structure, convenient to operate and convenient to use and popularize.

Description

technical field [0001] The invention relates to the field of geotechnical engineering, in particular to a test device and method for simulating the reinforcement of passive areas of foundation pits. Background technique [0002] In recent years, with the development and utilization of urban underground space, foundation pit engineering has developed in the direction of larger scale, deeper depth, more complex geological conditions and construction environment, and the scope and degree of influence of foundation pit excavation on the surrounding environment have become increasingly Larger and larger, especially in the excavation of deep foundation pits in weak water-rich strata. At present, the design concept of foundation pit has obviously changed from strength control to deformation control. How to control the deformation of the support structure caused by the excavation of the foundation pit and reduce the environmental impact is the primary content in the implementatio...

AI Technical Summary

Problems solved by technology

Due to the many factors and complex relationships affecting the deformation of soft soil foundation pits, the theory of the influence of passive zone reinforcement on foundation pits is still quite weak. At the same time, it is difficult to accurately sele

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