Testing apparatus for simulating phenomenon and law of soil heave-piping failure

A test device and a technology for simulating soil, which can be used in basic structure tests, construction, and basic structure engineering, etc., can solve problems such as uneven pressure and impact of confined aquifers, and achieve high accuracy and easy device assembly.

Inactive Publication Date: 2014-05-28
TONGJI UNIV
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Problems solved by technology

[0004] Zhan Liangtong of Zhejiang University and others once designed a model test device for seepage failure of foundation pit engineering (patent number 200820165167.3). The pressure of the confined aquifer is uneven or the experimental results are affected by the action of contact flow soil

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  • Testing apparatus for simulating phenomenon and law of soil heave-piping failure
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  • Testing apparatus for simulating phenomenon and law of soil heave-piping failure

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Embodiment

[0029] A test device for simulating the phenomenon and law of soil surge damage, the structure of which is as follows: figure 1 As shown, the experimental device includes a model box 1, a pressurized component and a soil deformation measurement component. The model box 1 is provided with a filter layer, and the test soil 2 is laid on the top of the filter layer. The water storage chamber 6, the pressurized assembly communicates with the pressurized water storage chamber 6, and the soil deformation measurement assembly is arranged in the test soil 2 in the model box 1; The camera 16 of the whole process of the burst destruction, the camera 16 is arranged on the tripod 17, and the angle is adjusted to make it record the soil burst destruction process in the model box 1. The pressurizing assembly includes a water tank 7, a water pipe 9, a booster pump 8 and a water pressure gauge 10. The water tank 7 communicates with the pressurized water storage chamber 6 through a water pipe 9...

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Abstract

The invention relates to a testing apparatus for simulating phenomenon and law of soil heave-piping failure. The testing apparatus comprises a model box, a pressure component and a soil deformation measurement component. An inverted filter layer is arranged in the model box, a test soil layer is laid on the inverted filter layer, a pressurizing water storage chamber is arranged below the inverted filter layer and communicated with the pressure component, and the soil deformation measurement component is arranged in the test soil in the model box. The pressure component is used to apply water pressure to the bottom of the test soil or excavate the soil to realize soil heave-piping failure; the soil deformation measurement component measures water pressure, soil deformation displacement, soil pore pressure and soil mechanics parameters. Compared with the prior art, the testing apparatus is easy to assemble and high in test accuracy, is applicable to research on phenomenon and law of heave-piping failure of different type of soil in foundation pit and underground engineering fields, provides guide to real foundation pit and underground engineering designs, and can also be used for scientific research and teaching in fields of geological engineering and geotechnical engineering.

Description

technical field [0001] The invention belongs to the field of foundation pits and underground engineering, and in particular relates to a test device for simulating the phenomena and rules of soil surge damage. Background technique [0002] In recent years, with the rapid development of urban underground railways, high-rise buildings, civil air defense projects and other infrastructure in China, there are more and more deep foundation pit projects. Surge damage has become a common cause of engineering accidents. [0003] During the excavation of foundation pit engineering and underground engineering, surge damage may occur, which will have a huge impact on engineering safety. Previous studies mainly focused on the experimental analysis of the safe thickness of soil inrush, and seldom conducted lateral analysis on the deformation and failure phenomena and laws of different soils. During the excavation of the foundation pit, for the confined aquifer, if the excavation weakens...

Claims

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Application Information

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IPC IPC(8): E02D33/00
Inventor 王建秀刘笑天马瑞强姜韵骅邹宝平黄天荣
Owner TONGJI UNIV
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