Model test device and test method for soil reinforcement at the bottom of rectangular foundation pit in soft soil area

Abstract

The invention discloses a soil reinforcement model test device and a test method at the bottom of a rectangular foundation pit in a soft soil area. Strain measurement device, foundation pit displacement measurement device and test soil, the model box is made of steel plate and plexiglass; the support pile model and inner support model are made of PVC circular pipe and PVC square pipe, and the crown beam model is made of wood board The soil stress measuring device is composed of a miniature resistance earth pressure cell; the pile strain measuring device is composed of a strain gauge. The invention can simulate the excavation process of the foundation pit after the reinforcement of the bottom soil of the rectangular foundation pit in the soft soil area, fills the blank of the soil reinforcement model test research at the bottom of the foundation pit, and provides a basis for the excavation of the foundation pit after the soil at the bottom of the foundation pit is reinforced. The study of the impact of excavation on itself and the surrounding area provides effective experimental data support and provides reference for the design and construction of foundation pit engineering.

Description

technical field [0001] The invention relates to a soil reinforcement model test device and test method at the bottom of a rectangular foundation pit in a soft soil area, in particular to a model test device and a test method for foundation pit excavation simulation under different soil reinforcement forms at the bottom of a foundation pit, which can be used for Measure foundation pit soil pressure and foundation pit deformation under different foundation pit excavation conditions. Background technique [0002] There are many factors involved in foundation pit deformation, such as soil properties, excavation methods, groundwater conditions, surrounding environment, etc. The control of foundation pit deformation is usually considered from two aspects of design and construction. In the design, choosing a suitable maintenance structure, a reasonable support structure system, applying prestress to the anchor rods and supports, reinforcing the soil at the bottom of the foundation ...

AI Technical Summary

Problems solved by technology

However, the numerical simulation method, the establishment of the numerical model is more complicated, the calculation is time-consuming and there will be a gap with the actual situation.

The on-site monitoring method is time-consuming, labor-intensive, and expensive, and mechanical construction has a great impact on monitoring

At present, no one has conducted research on the model test of soil reinforcement at the bottom of the foundation pit.

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