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Visual experiment device and experiment method in consideration of slope instability soil displacement under seepage-stress-rainfall coupling effect

A technology of slope instability and test equipment, applied in the field of engineering tests, can solve the problems of stress, strain, displacement field measurement, inaccurate observation of equipment costs, etc., and achieve high feasibility

Inactive Publication Date: 2018-04-13
南京科兴新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the traditional model test for studying slope stability, only the influence of rainfall, seepage head and heap load is considered. However, the stability of actual engineering slopes is a very complicated problem, and these three main influencing factors are often In addition, due to the opacity of the soil, it is difficult to measure the stress, strain, displacement field, etc. during the test process by traditional model tests, although current techniques including CT and nuclear magnetic resonance have been applied. to the field of slope engineering tests, but the high cost of equipment and the inaccuracy of observation results greatly limit the wide application of these techniques

Method used

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  • Visual experiment device and experiment method in consideration of slope instability soil displacement under seepage-stress-rainfall coupling effect

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The first step: place a transparent model box 16, a water supply pipe 11 and a water supply box 1 in a flat site. The transparent model box 16 is a rectangular parallelepiped made of organic transparent glass with an upper opening and a size of 500mm (length)* 500mm(width)*400mm(height); in order to achieve the expected effect of this test, the realization environment of this test is set in the dark; No. 5 white oil is mixed into a solution at a certain temperature (24°C in this example) and a certain humidity (30% in this example) at a certain mass ratio (1:4 in this example); The solution is mixed with fused silica sand and fully mixed to prepare saturated transparent soil 17 with a designed relative density; the fused silica sand should have a particle size range of 0.5mm-1mm;

[0035] The obtained transparent soil 17 was slowly placed in the transparent model box 16 at a certain inclination angle to simulate the slope. In order to better achieve the effect of this e...

Embodiment 2

[0043] In Example 1, the influence of top loading on slope instability and failure is studied under the condition of controlling rainfall and seepage head constant. Change the implementation of steps 2, 3, and 6. On the loading plate on the top of the slope of the transparent soil 17, place the weight 10 with the set load; inject the mixed solution of n-dodecane and No. 15 white oil with the same proportion as the transparent soil 17 into the water supply pipe 11 To the set water head height, and keep the osmotic water head unchanged during the test, open the water stop clip 13, so that the water supply pipe 11 has a mixed solution of n-dodecane and No. 15 white oil with the same proportion as the transparent soil 17 After passing through the gravel layer 14, the transparent soil 17 is impacted; the water pump 4 and a certain water level regulating valve 5 are turned on, so that the mixed solution of n-dodecane and No. 15 white oil in the water supply tank 1 with the same prop...

Embodiment 3

[0045] In Example 1, the influence of the load on the top of the slope on the instability and failure of the slope is studied under the condition of controlling the rainfall and the seepage head constant. Change the implementation of steps 2, 3, and 6. On the loading plate on the slope top of the transparent soil 17, place the weight 10 for the set load; inject the mixed solution of n-dodecane and No. 15 white oil with the same proportion as the transparent soil 17 into the water supply tank 1 , adjust the rain board 7 to a certain height through the intelligent lifting device 3, in this example, the vertical distance between the rain board 7 and the slope top of the transparent soil 17 is set to 400mm; one end of the rain board 7 is always inserted into the water supply tank 1. Below the liquid level; a water pump 4, a water level regulating valve 5 and a flow meter 6 are provided on the rainfall plate; the water pump 4 and a certain water level regulating valve 5 are turned ...

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Abstract

The invention relates to the technical field of engineering experiments, in particular to a visual experiment device and experiment method in consideration of slope instability soil displacement undera seepage-stress-rainfall coupling effect. The device comprises an artificial rainfall system, a seepage system and a simulated side slope; the artificial rainfall system comprises a water supply tank, an intelligent lifting device and a rainfall board; the seepage system is closely connected with a transparent model box, and the bottom of the seepage system is communicated with the transparent model box through a water stop clamp; a certain space is reserved at the bottom of the transparent model box, a gravel layer is laid above the reserved space, the saturated transparent soil simulated side slope with a certain inclined face is placed above the gravel layer, and anti-slip piles are inserted into the surface of the transparent soil side slope; a high-speed industrial camera is placedin front of the transparent model box, and a laser is arranged on the left side or the right side of the transparent model box. By adoption of a transparent soil technique and computer image processing software, the problem of visualization of soil interior displacement under the seepage-stress-rainfall coupling effect is solved, the experiment device is simple, easily understandable and reusable,and the experiment method is high in feasibility.

Description

technical field [0001] The invention belongs to the technical field of engineering tests, and in particular relates to a test device and a test method for visualizing the displacement of an unstable soil mass of a seepage stress-rainfall coupling slope. Background technique [0002] As the world enters a period of high frequency of extreme natural disasters, people are paying more and more attention to natural disasters. According to statistics, slope instability and the natural disasters caused by it have become geological disasters second only to earthquakes. Relevant studies have shown that the three important factors affecting the stability of the slope are the heavy rainfall, the seepage water head up and down the slope, and the stacking load beside the slope. As rainwater seeps into the slope soil and the seepage head rises upstream and downstream of the slope, according to the principle of effective stress of the soil, the shear strength of the soil decreases at this...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/24G01N21/84
Inventor 不公告发明人
Owner 南京科兴新材料科技有限公司
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