Multi-soaking condition simulation test model box and test method thereof

A technology for test model and working condition simulation, applied in teaching models, soil material testing, material inspection products, etc., it can solve the problems of less research on indoor model test methods, changes in tunnel structure stress, uneven settlement of the basement, etc. The effect of strong reusability, accurate test data and good application prospects

Inactive Publication Date: 2017-04-26
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the collapsible loess is immersed in water, its strength and bearing capacity will be reduced, which may have adverse effects on the superstructure. For example, in the subway tunnel in the collapsible loess area, when the tunnel base is flooded, it may cause uneven settlement of the base, resulting in damage to the tunnel structure. When the surface is immersed in water, the self-supporting capacity of the surrounding rock may be weakened for shallow subway tunnels, and the load acting on the tunnel lining will increase. The above two working conditions may eventually cause lining cracks and leakage. Serious threat to the operational security of the tunnel
At present, there have been many studies on the infl

Method used

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  • Multi-soaking condition simulation test model box and test method thereof
  • Multi-soaking condition simulation test model box and test method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: Simulation of flooding conditions for submerged subsurface tunnels in loess loess.

[0028] Step 1: According to the aforementioned content and the requirements of the test conditions, determine the size of the model box: length × width × height = 2m × 1.8m × 1m, the scale of the model is 1:30, and the diameter of the tunnel model is 0.2m. According to the content of the invention and the formulation The size of the model box is made, and the immersion system and loading module on the upper part of the model box will not be installed temporarily;

[0029] Step 2: Prepare simulated soil materials, take a sufficient amount of collapsible loess from the construction site for backup, make a tunnel lining model, and attach strain gauges at the measuring points of the tunnel test section;

[0030] Step 3: Lay a layer of permeable geotextile at the bottom of the model box, start to fill the simulated soil material, put the tunnel model with strain gauges attached wh...

Embodiment 2

[0034] Example 2: Simulation of surface flooding condition of subsidence loess subway tunnel.

[0035] Step 1: According to the aforementioned content and the requirements of the test conditions, determine the size of the model box: length × width × height = 2m × 1.8m × 1m, the scale of the model is 1:30, and the diameter of the tunnel model is 0.2m. According to the content of the invention and the formulation The size of the model box is made, and the immersion system and loading module on the upper part of the model box will not be installed temporarily;

[0036] Step 2: Prepare simulated soil materials, take a sufficient amount of collapsible loess from the construction site for backup, make a tunnel lining model, and attach strain gauges at the measuring points of the tunnel test section;

[0037] Step 3: Lay a layer of permeable geotextile on the bottom of the model box, start filling the simulated soil material, put the tunnel model pasted with strain gauges when fillin...

Embodiment 3

[0042]Example 3: Simulation of the impact of submerged pile foundations on nearby tunnels in collapsible loess areas.

[0043] Step 1: According to the aforementioned content and the requirements of the test conditions, determine the size of the model box: length × width × height = 2m × 1.8m × 1m, the scale of the model is 1:30, and the diameter of the tunnel model is 0.2m. According to the content of the invention and the formulation The size of the model box is made, and the immersion system and loading module on the upper part of the model box will not be installed temporarily;

[0044] Step 2: Prepare simulated soil materials, take a sufficient amount of collapsible loess from the construction site for backup, make tunnel lining models and pile foundation models, and paste strain gauges at the tunnel test section measurement points and pile foundation measurement points;

[0045] Step 3: Lay a layer of permeable geotextile at the bottom of the model box, start filling the ...

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Abstract

The invention discloses a multi-soaking condition simulation test model box and a test method thereof. The multi-soaking condition simulation model box comprises a lidless cavity composed of a section steel frame and side plates, the bottom of the cavity is provided with a baseboard having soaking holes, a water storage box is formed between the baseboard and the cavity, a middle isolation plate is arranged in the water storage box, the sidewall of the water storage box is provided with a plurality of soaking holes, a baffle plate which forms a water storage tank together with the sidewall of the cavity is arranged outside the bottom of the cavity, the top of the cavity is provided with a support, the support is provided with a length-adjustable soaking tube, and the top of the cavity is provided with a plurality of detachable reaction beams and a jack. The multi-soaking condition simulation test model box has the advantages of clear structure, complete functions, strong repeated usage, realization of multiple groups of test of different soaking condition requirements, and good application prospect.

Description

technical field [0001] The invention belongs to the field of indoor tests of geotechnical engineering, and in particular relates to a model box and a test method for a simulation test of multiple flooding conditions. Background technique [0002] Collapsible loess strata are widely distributed in my country, and the impact of collapsibility must be considered when building buildings on collapsible loess sites. As a symbol of modern cities, subways have been built in many large and medium-sized cities, and many subway sections are inevitably built in collapsible loess areas. After the collapsible loess is immersed in water, its strength and bearing capacity will be reduced, which may have adverse effects on the superstructure. For example, in the subway tunnel in the collapsible loess area, when the tunnel base is flooded, it may cause uneven settlement of the base, resulting in damage to the tunnel structure. When the surface is immersed in water, the self-supporting capaci...

Claims

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Application Information

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IPC IPC(8): G01N3/08G01N3/02G01N33/24G01D21/02G09B25/00
CPCG09B25/00G01D21/02G01N3/02G01N3/08G01N33/24G01N2203/0019G01N2203/0676G01N2203/0682
Inventor 谢永利翁效林张玉伟刘保健张留俊
Owner CHANGAN UNIV
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