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Physical simulation experiment device and method capable of controlling soil cave forming process

A technology of physical simulation and experimental equipment, applied in the field of indoor physical simulation experiments of rock and soil, can solve the problems of not being able to capture in real time, and achieve the effect of simple structure, simple operation method, and less soil consumption

Active Publication Date: 2020-03-17
INST OF KARST GEOLOGY CAGS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past, physical models used to study ground deformation often only observed the results of surface deformation, and could not capture the development and evolution of soil holes in the soil layer in real time when the self-weight stress and seepage force acted on the soil.

Method used

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  • Physical simulation experiment device and method capable of controlling soil cave forming process
  • Physical simulation experiment device and method capable of controlling soil cave forming process
  • Physical simulation experiment device and method capable of controlling soil cave forming process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Such as figure 1 A physical simulation experiment device that can control the formation process of soil caves is shown, including a seepage simulation device 1, a gravity simulation device 2 and a soil cave simulation box 3;

[0045] The seepage simulation device 1 mainly includes a water supply tower 11, a drain 13 connected to a conduit 12 drawn from the bottom of the water supply tower 11, a height adjustment device 14 for adjusting the height of the drain 13, The aqueduct 15 drawn, the seepage valve 16 that is located on the aqueduct 15 and the observation tube 17 vertically installed on the aqueduct 15; The lifting and lowering; the height adjustment device 14 specifically includes a pulley 141 and a pulley 142 bypassing the pulley, one end of the pulley is fixed on the upper end of the conduit, and the other end is a free end, which can be driven by pulling the free end of the pulley The conduit rises or falls, thereby controlling the height of the water discharg...

Embodiment 2

[0053] Utilize the experimental device of embodiment 1 to simulate the formation process of the soil cave, and simulate the gravitational field separately, and the concrete steps are:

[0054] S1, adjust the test bench 21 to be in a horizontal position by the jack 25, select the friction coefficient of the transmission belt 23 to be 0.6, close the baffle outlet 33 of the soil hole simulation box 3, smear vaseline at the contact part of the baffle 32 and the transmission belt 23, to play a role A certain sealing effect; in the soil hole simulation box 3, fill the soil layer by layer according to the experimental plan; use the transmission belt 23 of the gravity simulation device 2 to move a distance of 0.3m and stop after simulating the state of the soil layer under natural gravity, and then open the baffle exit;

[0055] S2. Gravity field for simulating the formation process of the soil cave: close the seepage device, only activate the gravity simulation device, turn on the dr...

Embodiment 3

[0057] Utilize the experimental device of embodiment 1 to simulate the formation process of the soil cave, and simulate the seepage-gravity sequential coupling method, the specific steps are:

[0058] S1, adjust the inclination angle of the test bench 21 to 30° by the jack 25, select the friction coefficient of the transmission belt 23 to be 0.6, close the baffle outlet 33 of the soil hole simulation box 3, smear vaseline at the contact place between the baffle plate 32 and the transmission belt 23, and start To a certain sealing effect; in the soil hole simulation box 3, according to the experimental plan layered filling; use the conveyor belt 23 of the gravity simulation device 2 to move a distance of 0.5m and then stop to simulate the state of the soil layer under natural gravity, and then open the stopper board export;

[0059] S2. The seepage-gravity sequential coupling of the simulated soil cave formation process is realized by performing multiple cycles of single seepag...

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Abstract

The invention discloses a physical simulation experiment device and method capable of controlling a soil cave forming process. The experiment device mainly comprises a soil cave simulation box, a seepage simulation device and a gravity simulation device. In the experiment process, water seepage force is provided by adjusting the water head height of the water supply tower of the seepage simulationdevice; self-weight stress is simulated through friction of the conveying belt of the gravity simulation device to act on the rock-soil body in the soil cave simulation box, a karst development areacovered with soil is simulated, and the process that the soil body on the rock surface is lost and migrated to a karst channel under the influence of the self-weight stress and underground water seepage force factors to form a cave in the soil is simulated. The experimental device is simple in structure and low in cost, the experimental method is easy and convenient to operate, the soil consumption is small, the experimental device is suitable for repeated experiments under various condition combinations, the influence effect of a single variable on the deformation rule of the soil cave can berealized and the experimental device has important theoretical and engineering significance for researching karst surface collapse prevention and control measures.

Description

technical field [0001] The invention relates to the technical field of indoor physical simulation experiments of rock and soil, in particular to a physical simulation experiment device and method capable of controlling the formation process of soil holes. Background technique [0002] Soil caves are caves in the soil formed by erosion and migration of the soil above the rock surface under the influence of factors such as self-weight stress and groundwater seepage force in the karst development area covered by soil. Its formation needs a soil layer that is easy to be eroded, and there are karst channels for excreting and storing eroded materials under it. Soil caves are a hidden and unfavorable geological phenomenon of karst. After the caves continue to expand to the ground, the roof becomes unstable and causes collapse or ground deformation and subsidence, which may eventually lead to geological disasters or engineering accidents. A large number of engineering practices hav...

Claims

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Application Information

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IPC IPC(8): G01N33/24
CPCG01N33/24
Inventor 贾龙雷明堂李录娟蒙彦蒋小珍潘宗源殷仁朝戴建玲管振德吴远斌周富彪程小杰罗伟权
Owner INST OF KARST GEOLOGY CAGS
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