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Large-scale dike piping dangerous case evolution mechanism physical simulation device

A physical simulation and piping technology, which is used in measurement devices, analysis of suspensions and porous materials, instruments, etc. It can solve problems such as the significant influence of model size, the inability to study the influence of mechanical piping expansion of the covering layer, and the different development laws.

Active Publication Date: 2021-07-23
CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Indoor physical model test is one of the main methods to study the mechanism of piping hazards, but the physical models currently used have shortcomings: (1) the size of the model is too small to have a significant impact on the evolution of piping hazards; (2) the rigid cover obviously affects the piping Expansion makes an impact
However, there is a problem with this method, that is, when the piping danger occurs, the piping opening and the piping flow will continue to expand upstream with time and hydraulic conditions, which will lead to the collapse of the clay covering layer, the expansion of the piping opening, and the expected flow rate on the cover plate. The hole is fixed throughout the piping evolution process, which severely restricts the piping flow rate and the development of the piping opening, making the observed development law of the piping danger obviously different from the actual situation, and it is impossible to predict the occurrence, development, and collapse of the embankment piping danger. (3) Existing models cannot study the influence of overburden mechanical properties on piping expansion

Method used

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  • Large-scale dike piping dangerous case evolution mechanism physical simulation device
  • Large-scale dike piping dangerous case evolution mechanism physical simulation device
  • Large-scale dike piping dangerous case evolution mechanism physical simulation device

Examples

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Effect test

Embodiment 1

[0043] This embodiment provides a physical simulation device system for the evolution mechanism of large-scale embankment piping hazards,

[0044] Including: model body, removable cover system, water supply system, seepage field monitoring system;

[0045] The model body is used to simulate embankment foundations including overburden and sand layers;

[0046] The water supply system communicates with the main body of the model; the water supply system is used to provide hydraulic conditions for the main body of the model during the simulation of piping hazards;

[0047] The removable cover system covers the cover layer in the area upstream of the spout;

[0048] The seepage field monitoring system is used to monitor the pressure head of the sand layer.

[0049] Further, it may also include: any one or multiple systems of the overburden deformation monitoring system, piping flow and sediment concentration monitoring system, and piping outlet shape expansion monitoring system;...

Embodiment 2

[0072] This embodiment provides a physical simulation device system for the evolution mechanism of large-scale embankment piping hazards, including a model body, a removable cover system, a water supply system, a water circulation system, a seepage field monitoring system, a cover layer deformation monitoring system, piping flow and content Sediment monitoring system, pipe spout shape expansion monitoring system. The main body of the model is used to simulate the dual structure embankment, providing a place for the occurrence of piping; in order to objectively simulate the evolution process of piping, the piping outlet and its downstream area are without cover plates, while the upstream of the piping outlet adopts a removable cover system . According to the seepage field monitoring system and the expansion of piping, in the upstream area where the piping opening has not yet expanded, and this area can resist the jacking action of the pressurized water head without damage, by g...

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Abstract

The invention discloses a large-scale dike piping dangerous case evolution mechanism physical simulation device, and relates to the technical field of dike piping dangerous case evolution mechanism physical simulation devices. According to the large-scale dike piping dangerous case evolution mechanism physical simulation device, the impermeability of a sand layer pressure water head and a covering layer is monitored according to a seepage field monitoring system; under the condition that the upstream area of the covering layer with the piping opening which not expanded and the upstream area of the covering layer with the piping opening which not expanded can resist the jacking effect of a confined water head and cannot be damaged, the covering layer is exposed by disassembling the cover plate on the detachable and replaceable cover plate system, conditions are provided for the piping opening which is not to be restrained when the piping opening is expanded to the upstream, and a real dike piping danger expansion process is simulated.

Description

technical field [0001] The invention relates to the technical field of a physical simulation device for the evolution mechanism of embankment piping danger, in particular to a physical simulation device for the evolution mechanism of large-scale embankment piping danger. Background technique [0002] Piping danger is one of the most common dangers in embankments in our country, which seriously affects the safe operation of embankments and has caused great losses to the lives and property of our people over the years. Piping refers to the phenomenon that under the action of seepage, the fine particles in the non-cohesive soil move or are carried out through the gaps of the coarse particle skeleton, resulting in the formation of channels in the soil layer and the phenomenon of concentrated water gushing. Indoor physical model test is one of the main methods to study the mechanism of piping hazards, but the physical models currently used have shortcomings: (1) the size of the m...

Claims

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Application Information

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IPC IPC(8): G01N15/08
CPCG01N15/0826
Inventor 吴庆华张伟崔皓东盛小涛李少龙王金龙汪啸
Owner CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
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