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

A model test device and the technology of the bottom of the foundation pit, which are applied in the test of foundation structure, foundation structure engineering, construction, etc., can solve the problems of high cost, time-consuming calculation, and large monitoring influence, and achieve convenient operation, easy operation, and instrumentation Construct simple effects
CN108643247AActive Publication Date: 2018-10-12EAST CHINA JIAOTONG UNIVERSITY
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Patent Information

Authority / Receiving Office
CN ยท China
Current Assignee / Owner
EAST CHINA JIAOTONG UNIVERSITY
Publication Date
2018-10-12

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Abstract

The invention discloses a model test device for soil reinforcement at the bottom of a rectangular foundation pit in a soft soil area and a test method. The device comprises a model box, a retaining pile model, a crown beam model, an inner supporting model, a soil stress measuring device, a pile strain measuring device, a foundation pit displacement measuring device and tested soil. The model box is composed of steel plates and polymethyl methacrylate. The retaining pile model and the inner supporting model are made of PVC round pipes and PVC square pipes, and the crown beam model is made of wood. The soil stress measuring device is composed of miniature resistance soil pressure boxes. The pile strain measuring device is composed of strain gauges. By the adoption of the model test device and the test method, the process of the rectangular foundation pit extraction in the soft soil area after the pit bottom soil reinforcement can be simulated, the blank of the foundation pit bottom soilreinforcement model test research can be filled, effective experimental data support can be provided for the research on the influence of the foundation pit excavation on the foundation pit excavationand the surrounding area after the foundation pit bottom soil reinforcement, and reference can be provided for the design and construction of the foundation pit engineering.
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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 ...

Claims

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