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Centrifugal model testing device for simulating pressure water head change and stability of foundation pit

A technology of centrifugal model test and water level change, which is applied in basic structure test, basic structure engineering, construction, etc. It can solve the problems of difficult control of water level control system operation, large error of water level of water level control box and pore water pressure, etc., and achieve test Intuitive Effects

Inactive Publication Date: 2014-10-15
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is difficult to control the operation of the water level control system under the high acceleration condition of the traditional foundation pit centrifugal simulation test, and the measurement error of the water level and pore water pressure of the water level control box is relatively large

Method used

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  • Centrifugal model testing device for simulating pressure water head change and stability of foundation pit
  • Centrifugal model testing device for simulating pressure water head change and stability of foundation pit
  • Centrifugal model testing device for simulating pressure water head change and stability of foundation pit

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Embodiment

[0017] Such as Figures 1 to 3 As shown, a centrifugal model test device for simulating the change and stability of the pressure water level of the foundation pit, the device includes a model box 1, a water tank partition 2, a simulation plate of the diaphragm diaphragm wall of the foundation pit 3, and an inner support of the foundation pit enclosure wall 4 and sensing, 7. The water tank dividing plate 2 is arranged in the model box body 1, and the model box body 1 is separated into a water tank 11 and a soil body box 12. A gap of 100 mm is provided between the bottom of the water tank dividing plate 2 and the bottom of the model box body 1, so that The bottoms of the water tank 11 and the soil body box 12 form a channel with a height of 100mm. The soil body box 12 is filled with sandy soil layer, cohesive soil layer and muddy soil layer from bottom to top. The bottom of the water tank 12 is filled with a layer of sandy soil layer. And the thickness of the sand layer on both...

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Abstract

The invention relates to a centrifugal model testing device for simulating the pressure water head change and stability of a foundation pit. The device comprises a model tank body, a water tank clapboard, foundation pit continuous wall simulation boards, a foundation pit enclosure wall inner support and a sensor, wherein the water tank clapboard is arranged in the model tank body, and partitions the model tank body into a water tank and a soil body tank; the bottoms of the water tank and the soil tank are communicated with each other; the bottom of the water tank and the inside of the soil body tank are filled with a soil body; two foundation pit continuous wall simulation boards are arranged in parallel in the soil body tank; the foundation pit enclosure wall inner support is vertically arranged between the two foundation pit continuous wall simulation boards; the sensor is arranged in the soil body. Compared with the prior art, the centrifugal model testing device has the advantages that the influence of the change of the water body pressure on the foundation pit environment effect and inrush stability is simulated through the water tank clapboard, and an intuitional testing effect is achieved.

Description

technical field [0001] The invention relates to a model test device, in particular to a device that can consider the effects of changes in the pressure-bearing water level of foundation pits on the environmental effects of foundation pits and the stability of inrush and uplift resistance, and is convenient for erecting supports and excavating soil, measuring water levels and pore pressures, Model test device for monitoring internal force and displacement of foundation pit. Background technique [0002] With the continuous development of urban construction, the scale and construction difficulty of underground engineering continue to increase, and the practice of foundation pit engineering is facing many new problems and challenges that have never been encountered before. In Shanghai, Nanjing, Hangzhou and other soft soil areas, under the action of confined water pressure, deep foundation pits are prone to piping, soil flow and inrush damage at the bottom of the pit. The larg...

Claims

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Application Information

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IPC IPC(8): E02D33/00
Inventor 李镜培张飞柏挺梁发云
Owner TONGJI UNIV
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