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Visual test device and visual test method for influence of temperature change on subway tunnel

A technology of temperature change and test device, which is applied in the application of thermometers, thermometers, measuring devices, etc., can solve the problems of undiscovered subway safety operation, etc., and achieve the effect of strong repeatability, easy realization and convenient operation

Active Publication Date: 2020-01-31
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nowadays, transparent soil technology is mostly used to simulate slope sliding, piling construction process and geotechnical property test, and it has not been found that it is applied to the relevant research on the influence of temperature changes on the safe operation of subways

Method used

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  • Visual test device and visual test method for influence of temperature change on subway tunnel
  • Visual test device and visual test method for influence of temperature change on subway tunnel
  • Visual test device and visual test method for influence of temperature change on subway tunnel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] like figure 1 , figure 2 , image 3 and Figure 4 A visual test device for the influence of temperature changes on subway tunnels is shown, including a model box system, a roadbed simulation system, a temperature control system, a water supply system, a subway tunnel model system, and a CT measurement system.

[0056] Wherein, the transparent model box 1 is a closed rectangular box with a length of 60-80cm, a width of 40-60cm, and a height of 50-70cm. It is made of a transparent plexiglass plate with a thickness of 3-5cm. There are air inlet holes 2 and air outlet holes 3, and the side wall plexiglass plate is provided with a side water supply port 4 and a bottom water supply port 5, between the side wall plexiglass plates and between the side wall plexiglass plate and the bottom surface plexiglass plate. The connection is fixed by superglue, and the organic glass plate on the top surface and the organic glass plate on the side wall are connected by bolts 19;

[00...

Embodiment 2

[0070] like figure 1 , figure 2 , image 3 and Figure 4 A visual test device for the influence of temperature changes on subway tunnels is shown, including a model box system, a water replenishment system and a temperature control system connected to the inside of the model box system, a roadbed simulation system and a subway tunnel model in the model box system 20, and a CT measurement system located outside the model box system.

[0071] Among them, the model box system includes a transparent model box 1, an air inlet 2 and an air outlet 3 set on the top of the transparent model box 1 and respectively connected to the temperature control system, and opened on the side wall of the transparent model box 1 and respectively connected to the side permeable stones. 25 and the side water supply port 4 that is connected with the water supply mechanism, and the bottom water supply port 5 that is opened on the side wall of the transparent model box 1 and is connected with the bot...

Embodiment 3

[0085] Refrigerant in the present embodiment is denatured alcohol;

[0086] The visualization test method of the influence of temperature change on the subway tunnel in the present embodiment comprises the following steps:

[0087] 1) Preparation of transparent soil: Mix 15# white mineral oil and n-dodecane uniformly at a volume ratio of 3:1 to obtain a mixed solution, then mix the mixed solution with amorphous silica powder at a mass ratio of 4:1, and then Degassing in a vacuum environment with a vacuum degree of -0.09MPa or more for 4 hours, and then standing under normal pressure, when the soil sample is transparent without air bubbles and the vertical strain is ≤0.00025mm, the transparent soil is obtained;

[0088] 2) Sample filling: open the top plexiglass plate of the transparent model box 1, and smear vaseline on the inner bottom and sides of the transparent model box 1, place the bottom permeable stone 17 at the bottom, and place the side permeable stone 25 on the side...

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Abstract

The invention relates to a visual test device and a visual test method for the influence of temperature change on a subway tunnel. The visual test device comprises a model box system, a water supplementing system and a temperature control system which are communicated with the model box system, a roadbed simulation system and a subway tunnel model which are arranged in the model box system, and aCT measurement system which is arranged outside the model box system. The visual test method comprises the following steps: 1) preparing transparent soil; 2) paving permeable stones at the bottom andside walls of a transparent model box, laying transparent soil in layers, and arranging the subway tunnel model; 3) fixing and sealing the transparent model box; 4) respectively communicating the transparent model box with a low-temperature constant-temperature tank, and communicating the permeable stones with a water supply mechanism; 5) setting test conditions; and 6) starting the test, collecting and organizing data. In comparison with the prior art, the visual test device and the visual test method of the invention have the beneficial effects that: the transparent soil is adopted to simulate a natural soil body and a CT technology is combined to perform detection, so as to realize qualitative analysis and quantitative analysis of a test result, and obtain a settlement rule of the subway tunnel under different temperature changes.

Description

technical field [0001] The invention belongs to the technical field of visual model tests, and relates to a visual test device and method for the influence of temperature changes on subway tunnels. Background technique [0002] With the rapid development of social economy, my country's urbanization process continues to advance, and the population in cities has increased dramatically, which has brought enormous pressure to traffic. Urban underground space subway construction has become an important way to solve traffic congestion. After the research of many scholars at home and abroad, the underground space development technology has been continuously improved, and the subway construction technology has become increasingly mature. However, in today's research, finite element software is mostly used for numerical simulation and actual engineering monitoring. Due to the complexity of the soil, it is difficult for finite element software to perform accurate simulation. Actual en...

Claims

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Application Information

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IPC IPC(8): G01N23/046G01K13/00G01C5/00
CPCG01N23/046G01K13/00G01C5/00
Inventor 王长丹陈凯祥周顺华王炳龙李柱雄散骞骞周伟
Owner TONGJI UNIV
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