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Multi-path dynamic water seepage erosion simulation test device considering disturbance and initial state

A technology of simulating test and initial state, applied in the field of geotechnical engineering, can solve the problems of ignoring the common coupling effect, raising the water head, and inconvenient test, so as to simplify the test operation and improve the test efficiency

Pending Publication Date: 2022-08-05
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it ignores the common coupling effect of external disturbance and internal seepage erosion, and the simulation of different paths and high-pressure water head test conditions has certain defects. For example, the simulation of high pressure mainly raises the height of the water head, which brings inconvenience to the test.

Method used

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  • Multi-path dynamic water seepage erosion simulation test device considering disturbance and initial state
  • Multi-path dynamic water seepage erosion simulation test device considering disturbance and initial state
  • Multi-path dynamic water seepage erosion simulation test device considering disturbance and initial state

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Experimental program
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Embodiment 1

[0032] like Figure 1-Figure 4 As shown, Embodiment 1 of the present invention provides a multi-path dynamic water seepage erosion simulation test device considering disturbance and initial state, including a constant pressure component 100, a water supply component 200, a coarse-grained soil seepage component 300, and a data acquisition component 400 .

[0033] The coarse-grained soil seepage assembly 300 includes a test bed 301 and a test cylinder 302 installed on the test bed 301. The test cylinder 302 can be arranged horizontally or vertically to simulate a horizontal seepage path and a vertical seepage path, respectively. Specifically, when the test cylinder 302 is arranged horizontally, the test cylinder 302 is placed on the test table 301 through the support; and when the test cylinder 302 is arranged vertically, a stepped mounting hole is opened on the test table 301, so that the test cylinder 302 It can be erected on the test stand 301 smoothly, and the bottom end is...

specific Embodiment approach

[0052] Embodiment 2 of the present invention provides a specific implementation of a horizontal seepage path, including the following steps:

[0053] Step 1: Load the coarse-grained soil sample into the test column 303 .

[0054] Step 2: Connect each part of the device: connect the air pump 101 to the water supply tank through the air pipe 103, the water outlet 206 of the water supply tank is connected to the first water inlet 304 of the test tube 302, and the pressure measuring hole 311 and the digital display pressure gauge 401 are tested. Press the pipe connection, put the screen of the test cylinder into the connection between the flange 307 and the horizontal seepage joint 308, connect the horizontal seepage joint 308 and the test column 303, place the test cylinder 302 on the test bench 301 horizontally, and fix the test with bolts The support of the cylinder 302, the horizontal pressure gauge fixing plate 402 is installed on the test bench 301, and the dual-view detecti...

Embodiment 3

[0060] Embodiment 3 of the present invention provides a specific implementation of a vertical seepage path (bottom-up or top-down), including the following steps:

[0061] Step 1: Load the coarse-grained soil sample into the test column 303 .

[0062] Step 2. Connect each part of the device: connect the air pump 101 to the water supply tank through the air pipe 103, the water outlet 206 of the water supply tank is connected to the first water inlet 304 of the test tube 302, and the pressure measuring hole 311 and the digital display pressure gauge 401 are tested. Press the pipe connection, put the test cylinder screen into the connection between the flange 307 and the first vertical seepage joint 309 (or the second vertical seepage joint 310), and connect the first vertical seepage joint 309 (or the second vertical seepage joint 309). The seepage joint 310) and the test column 303, the test cylinder 302 is placed upright on the test bench 301, the vertical pressure gauge fixin...

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Abstract

The invention provides a multi-path dynamic water seepage erosion simulation test device considering disturbance and an initial state. The multi-path dynamic water seepage erosion simulation test device comprises a constant pressure assembly, a water supply assembly, a coarse particle soil seepage assembly and a data acquisition assembly, the coarse particle soil seepage assembly comprises a test bed and a test cylinder, the test cylinder can be horizontally or vertically arranged, a test column is arranged in the test cylinder, a first water inlet is formed in the first end of the test cylinder, a seepage opening is formed in the second end of the test cylinder, a plurality of pressure measuring holes are formed in the side wall of the test cylinder, and the water supply assembly is communicated with the first water inlet to provide seepage water pressure for the first water inlet; the constant pressure assembly stably controls the water pressure of the water supply assembly, the vibration meter applies vibration dynamic load to the test cylinder, and the data acquisition assembly is used for acquiring data. According to the invention, seepage erosion of porous media with different seepage paths can be simulated, stable and controllable water pressure can be provided, test operation is simplified, test efficiency is improved, and seepage erosion of underground cavities under different frequency disturbance conditions can be simulated.

Description

technical field [0001] The invention relates to the field of geotechnical engineering, in particular to a multi-path dynamic water seepage erosion simulation test device considering disturbance and initial state. Background technique [0002] With the implementation of my country's strategy to strengthen the country in transportation, the scale of urban rail transit infrastructure and shield equipment technology have developed rapidly. More and more shield tunnels need to be built in urban areas with heavy traffic and rich groundwater runoff, which often lead to sudden ground collapse accidents. , causing heavy losses and negative social impacts. How to scientifically and effectively prevent and control the collapse accidents induced by shield construction is still an unresolved on-site problem at home and abroad. [0003] Underground cavities are generally caused by natural and man-made factors. Underground cavities formed by natural factors include: dissolution of soluble ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/56G01N17/00
CPCG01N3/567G01N17/00
Inventor 傅金阳杨州孙前辉张寅初王树英阳军生
Owner CENT SOUTH UNIV
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