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A covered karst collapse simulation test device and its operating method

A karst collapse and simulation test technology, applied in the field of karst ground collapse research, can solve the problems of influencing simulation reliability, many influencing factors, and difficulty in analyzing multi-structure collapse interaction modes and influence laws, etc. Convenient test conditions and rich test data effects

Active Publication Date: 2021-05-25
山东大学(齐河)新材料与智能装备研究院 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the complex genetic mechanism, numerous influencing factors and strong concealment of karst collapse, its catastrophic mechanism and evolution process are still unclear.
Physical simulation test is an important means to carry out research on karst collapse. The inventors found that the existing simulation test device can show the catastrophe process and disaster-causing mode more intuitively, but there are still some technical deficiencies, mainly including: (1) The simulated working conditions of some devices are relatively single, which cannot fully characterize the complex environmental geological conditions of the collapse; (2) The size of the opening of the karst structure is an important factor affecting the collapse, but most of the existing devices are fixed openings, and the size cannot be adjusted; (3 ) Most of the existing devices simulate a single karst structure, and it is difficult to analyze the interaction mode and influence law of multi-structure collapse; (4) The existing devices are mostly welded by steel plates, and excavation and observation are required after the test is completed. complex and affects the reliability of the simulation

Method used

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  • A covered karst collapse simulation test device and its operating method
  • A covered karst collapse simulation test device and its operating method
  • A covered karst collapse simulation test device and its operating method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045]By the followingFigure 1 - Figure 7 The present invention will be described in detail, specifically, the structure is as follows:

[0046]This embodiment provides a cover type karst collapsed simulation test device including a water level control box 1, a collapse analog box 2, a relief apparatus, an overwater pipe 3, a rock-soluble structure opening 5, and the overflow device is mounted in the water level control box 1 side The rock soluble structure opening 5 has a plurality of, and is attached to the bottom of the collapsed simulation case 2; the water level control box 1 is in communication with the overater pipe 3, and the overwater pipe 3 is connected to the karst structure opening 5.

[0047]The overwater pipe 3 is mounted on one end of the water level control box 1 mounts the water supply valve 7, and the other end of the overwater pipe 3 is mounted, and the water supply valve 7 is turned off by opening the water supply valve 8 to the collapse analog box 2. At the same time,...

Embodiment 2

[0056]The rock structure opening 5 on the bottom of the collapsed simulation case 2 is closed by controlling the valve 6, and then fill the soil in the collapsed simulation box 2 according to the design parameters. When filling the soil, you need to lay a layer by layer by a certain confirmation until the design thickness is reached, and a certain number of stress strain sensors 15 are required to monitor the stress, strain data at different positions during the soil layer collapse.

[0057]During the filling process, the pressure tube 9 on both sides of the collapsed simulation box 2, the pressure tube 10 in contact with the soil of the soil is plugged by the sponge, and prevent the dirt blocking pressure tube 9, and the pressure pipe 10 thus affects the water level measurement. Accuracy while paste vertical scale at the walls to facilitate reading.

[0058]After the filling is completed, a plurality of displacement sensors 4 are disposed on the surface of the soil layer, and the settlin...

Embodiment 3

[0063]The rock structure opening 5 of the collapsed simulation case 2 is closed by controlling the valve 6, and the soil is filled into the collapsed simulation box 2. Thereafter, the two different spacing of rock control valve 6 is opened according to the test design conditions. For example, 1. The second and third rock structural control valve 6 at the bottom of the collapse simulation case 2 are completely opened, as the first research working condition; 2. Put the second and fourth control valve 6 of the collapse of the simulated box 2 Fully open, as a second research, the first and second control valve 6 of the collapsed simulation box 2 are completely opened, as the third working condition.

[0064]At the same time, the water level height in the water level control box 1 and the soil layer thickness in the collapsed simulation box 2 are set to a fixed value, and the other test operation steps are the same as the second example. By analyzing the collapse process and settling defor...

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Abstract

The invention discloses a covering type karst collapse simulation test device and its operation method, which solves the problems in the prior art that the opening of the karst structure cannot be adjusted, it is difficult to analyze the interaction mode and influence law of multi-structure collapse, and the operation is relatively complicated. , can effectively simulate the catastrophic evolution process of covered karst ground subsidence, and at the same time can conveniently adjust the key influencing factors such as the size, number and position of karst structures, the thickness of covering soil layer, and the change of groundwater level. The technical solution is: including a water level control box and a collapse simulation box. An overflow device for adjusting the height of the water level in the water level control box is installed on one side of the water level control box; the collapse simulation box is used for filling soil, and the bottom of the collapse simulation box is A plurality of karst structure openings are arranged at equal intervals in the direction, and the karst structure openings are equipped with control valves for adjusting the size of the openings; among them, the water level control box is connected with the karst structure openings through water pipes, and the water pipes can supply water to the collapse simulation box.

Description

Technical field[0001]The present invention relates to the field of rock ground collapse research, and more particularly to a cover type karst collapse simulation test device and its operational method thereof.Background technique[0002]Covering karst collapse usually refers to a disaster destruction of a cave, a rock structure such as a groove, and a disaster in which it is deformed under groundwater and external force and ultimately leads to the ground collapse. With the rapid advancement of the urbanization process, the rock ground collapse disaster frequently occur frequent in southwestern rock area in my country, leading to serious consequences such as road damage, building overall, and directly threaten the safety of people's lives and property.[0003]The study of karst collapse sweambox mechanism and prevention and control technology has been widely concerned. However, due to the complexity of the karst collapse, the factors have many influencing factors and strong concealment, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/24
CPCG01N33/24
Inventor 杨磊宋光啸林春金张庆松覃剑文林荣峰李让杰张耀磊
Owner 山东大学(齐河)新材料与智能装备研究院
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