Device and testing method for testing seepage failure rule under angle variable condition

A variable angle and regular technology, applied in the field of soil penetration failure parameter testing, can solve problems such as further research on piping

Inactive Publication Date: 2016-12-14
CHONGQING JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Prior art methods have carried out a series of studies on the relationship between the critical state of soil phase transition, phase transition rate, etc., and the physical properties of soil and fluid during piping, and explored the relationship between soil phase transition law and soil particle The relationship between gradation, compactness, and seepage velocity, etc., but the determination of the law of seepage direction affecting the occurrence and development of piping still needs further research

Method used

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  • Device and testing method for testing seepage failure rule under angle variable condition
  • Device and testing method for testing seepage failure rule under angle variable condition
  • Device and testing method for testing seepage failure rule under angle variable condition

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Embodiment 1

[0066] join figure 2 , this embodiment discloses a device for testing the law of penetration failure under variable angle conditions, including a sample loading system, a front support 2, a rear support 3, an upstream water head application system 4, a pressure measurement system 5 and a solid-liquid separation weighing system.

[0067] see image 3 , the sample loading system includes a plexiglass sleeve 101, a top plate 1011, an upper partition 1012, a lower partition 1013, a bottom plate 1014, a cylinder 102, a lower buffer zone B, a sample cylinder 104 and an upper buffer zone A.

[0068] The sample cylinder 104 , the lower buffer zone B, the upper buffer zone A and the cylinder 102 are located inside the plexiglass sleeve 101 . Both ends of the plexiglass sleeve 101 are sealed with a top plate 1011 and a bottom plate 1014 . In the embodiment, bolts are used to connect the machine glass sleeve 101, the top plate 1011 and the bottom plate 1014

[0069] The upper buffer ...

Embodiment 2

[0088] The present embodiment discloses a method for testing the law of penetration failure under the test variable angle condition using the device described in Embodiment 1, which is characterized in that, comprising the following steps:

[0089] 1) Prepare samples according to the preset soil particle composition and compactness to obtain test samples.

[0090] 2) Put the sample into the sample area. The sample is placed on the lower buffer zone B, and a permeable sand filter is set between the sample and the lower buffer zone B.

[0091] 3) The cylinder is connected with the axial pressure control device (air compressor with control system). According to the seepage direction, adjust the inclination angle of the sample. In this step, according to the preset seepage direction, adjust the tightness of the pin I (2031) to adjust the height of the front end of the sample (S) up and down, and at the same time adjust the distance between the front and rear supports, and then a...

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Abstract

The invention provides a device and testing method for testing a seepage failure rule under an angle variable condition. The device comprises a test sample loading system, a front bracket, a rear bracket, an upstream water head applying system, a pressure measuring system and a solid-liquid separation weighing system. A soil mass seepage test is carried out through an indoor model test; according to a piping rule and a failure rule of a soil mass under the condition of different seepage directions, influences on a soil mass phase change critical condition and a phase change speed, and influences on a soil mass deformation rule, caused by seepage directions in a piping process, are determined.

Description

technical field [0001] The invention relates to a test method and a test device for the phase transition-constitutive interaction law in the process of soil piping in civil engineering and water conservancy engineering, and belongs to the field of soil penetration damage parameter testing. Background technique [0002] Piping is a phenomenon that fine particles of soil are carried out along the pores formed by skeleton particles under the action of seepage, and it is a main form of seepage damage. Soil is a porous medium composed of solid particles of different sizes. When piping occurs, the solid particles in the soil change from the original static state to the moving state under certain hydraulic conditions. Therefore, the occurrence of piping is the process of phase transition of part of the soil. The phase transition law of soil during the piping process is mainly the critical condition and phase transition rate of phase transition. The occurrence and development of p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N13/04
CPCG01N13/04
Inventor 梁越张强刘楠楠刘明维王俊杰
Owner CHONGQING JIAOTONG UNIVERSITY
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