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Method for simulating soil slope instability induced by groundwater

A technology for soil slope and groundwater, which is applied in soil material testing, material inspection products, etc., can solve the problems of model damage, failure to achieve test results, and failure to achieve water level control, so as to reduce erosion and improve test efficiency. The effect of shortening the test time

Inactive Publication Date: 2018-11-16
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The geotechnical centrifugal model test equipment disclosed in this patent document cannot achieve accurate and continuous water level control, and cannot obtain the amount of infiltration to the slope body when maintaining a certain water level, and under centrifugal force, water will pass through the seepage holes to the model box. The model produced a scour effect, the greater the centrifugal force, the more obvious the scour effect, it will cause serious damage to the model, can not achieve the ideal control of groundwater level, can not achieve the expected test results

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  • Method for simulating soil slope instability induced by groundwater
  • Method for simulating soil slope instability induced by groundwater
  • Method for simulating soil slope instability induced by groundwater

Examples

Experimental program
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Effect test

Embodiment 1

[0044] A method for simulating groundwater-induced soil slope instability, comprising the following steps:

[0045] a, the physical model is placed on the base of the centrifuge hanging basket, the centrifuge is turned on, and the centrifuge gives the physical model a centrifugal acceleration to saturate the soil at the bottom of the soil layer 7;

[0046] b. Raise the height of the external water tank 1, open the water outlet valve 19 and the water inlet valve 18, according to the thickness of the saturated soil layer 7, control the water injection amount through the water flow sensor 21 to slowly seep into the soil layer 7, and complete the entire soil layer 7 soil saturation process;

[0047] c. Close the water inlet valve 18, reduce the height of the external water tank 1, increase the centrifugal acceleration, so that the pore water pressure in the physical model is consolidated and dissipated, and the pore water pressure sensor 8 in the soil layer 7 is used to judge whet...

Embodiment 2

[0051] A method for simulating groundwater-induced soil slope instability, comprising the following steps:

[0052] a, the physical model is placed on the base of the centrifuge hanging basket, the centrifuge is turned on, and the centrifuge gives the physical model a centrifugal acceleration to saturate the soil at the bottom of the soil layer 7;

[0053] b. Raise the height of the external water tank 1, open the water outlet valve 19 and the water inlet valve 18, according to the thickness of the saturated soil layer 7, control the water injection amount through the water flow sensor 21 to slowly seep into the soil layer 7, and complete the entire soil layer 7 soil saturation process;

[0054] c. Close the water inlet valve 18, reduce the height of the external water tank 1, increase the centrifugal acceleration, so that the pore water pressure in the physical model is consolidated and dissipated, and the pore water pressure sensor 8 in the soil layer 7 is used to judge whet...

Embodiment 3

[0059] A method for simulating groundwater-induced soil slope instability, comprising the following steps:

[0060] a, the physical model is placed on the base of the centrifuge hanging basket, the centrifuge is turned on, and the centrifuge gives the physical model a centrifugal acceleration to saturate the soil at the bottom of the soil layer 7;

[0061] b. Raise the height of the external water tank 1, open the water outlet valve 19 and the water inlet valve 18, according to the thickness of the saturated soil layer 7, control the water injection amount through the water flow sensor 21 to slowly seep into the soil layer 7, and complete the entire soil layer 7 soil saturation process;

[0062] c. Close the water inlet valve 18, reduce the height of the external water tank 1, increase the centrifugal acceleration, so that the pore water pressure in the physical model is consolidated and dissipated, and the pore water pressure sensor 8 in the soil layer 7 is used to judge whethe...

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Abstract

The invention discloses a method for simulating soil slope instability induced by groundwater. The method is characterized by comprising the following steps: a, putting a physical model on a centrifugal machine; b, raising the height of an external water tank, opening a water outlet valve and a water inlet valve, carrying out water seepage into a soil layer according to the thickness of a saturated soil layer and completing the saturation process of a soil mass; c, closing the water inlet valve, reducing the height of the external water tank, improving the centrifugal acceleration to solidifyand disperse the internal pore water pressure of the physical model; d, after the solidification is finished, opening the water inlet valve, raising the height of the external water tank to the corresponding height according to the preset water level height of an internal water tank; obtaining different infiltration capacity of the water to the slope when the water in the internal water tank seepsinto the soil layer and stays at different heights, and observing the wetting front change and the slope deformation condition of the physical model. The method disclosed by the invention has the advantages that the height of the groundwater level can be accurately adjusted in real time and washing of water current to the slope body is prevented; in the whole test process, high operability, highreliability and good test effect are realized.

Description

technical field [0001] The invention relates to the field of physical model tests, in particular to a method for simulating groundwater-induced soil slope instability on a centrifuge. Background technique [0002] In soil slopes, human disturbance, rainfall, irrigation and groundwater are the main factors affecting slope stability. [0003] At present, the influence of man-made disturbances such as excavation, stacking, and rainfall on the stability of soil slopes has been systematically studied through laboratory tests, numerical simulations, and model tests. Due to the limitations of control technology, most of the researches on it focus on indoor experiments and numerical simulations. [0004] Therefore, realizing the control of the groundwater level is the most critical prerequisite for studying groundwater-induced soil slope stability through model tests. The centrifuge model test is currently the best model test method. The gravity is simulated by the centrifugal for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/24
CPCG01N33/24
Inventor 张晓超裴向军张子东韩祥森王思铎
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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