Experiment method for treatment of cracks in tunnel lining structure

An experimental method and lining technology, applied in measuring devices, instruments, scientific instruments, etc., can solve the problems of expensive repair materials and unsuitable promotion, and achieve the effect of ensuring reliability, convenient replacement, and ensuring accuracy

Inactive Publication Date: 2019-01-18
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the fact that the simulation experiment of tunnel lining structure crack treatment in the prior art ignores the fact that many factors affect the repair effect and the technical problem that the repair materials in the existing market are expensive and not suitable for promotion, the purpose of the present invention is to provide a tunnel lining structure crack treatment experimental method of treatment

Method used

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  • Experiment method for treatment of cracks in tunnel lining structure
  • Experiment method for treatment of cracks in tunnel lining structure
  • Experiment method for treatment of cracks in tunnel lining structure

Examples

Experimental program
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Effect test

Embodiment 1

[0034] This embodiment provides an experimental simulation platform for treating cracks in tunnel lining structures, including a test bench, a displacement gauge, two independent arc-shaped steel channels 2, and a hinge support 7 installed on the test bench. The cross-section of the arc-shaped steel channel 2 is a rectangle; the lower surfaces of two ends of the arc-shaped steel channel 2 are connected with the hinge support 7 and the two arc-shaped steel channels 2 jointly form an arc-shaped workpiece; the two arc-shaped steel channels 2 The other ends of the arc-shaped steel channels are all connected to the test bench through support rods and are hinged between the support rods and the arc-shaped steel channels; force loading devices 4 are arranged below the other ends of the two arc-shaped steel channels, and the arc-shaped steel frame A tensile dynamometer 3 is provided between the corresponding force loading devices 4; a specimen fixing device 5 is provided at the ends of...

Embodiment 2

[0046] This embodiment provides an experimental method for diagnosing cracks in tunnel lining structures, including the following steps:

[0047] Step 1: Prepare test pieces with cracks of different specifications, the specific specifications are: the crack sizes are 0.5㎜, 1㎜, 2㎜, 5㎜, 10㎜, 20㎜;

[0048] Step 2: Install the test piece, continue to load, simulate the continuous cracking of the cracked test piece, and record the cracking degree, crack displacement and loading force under different stress conditions in real time;

[0049] Step 3: Replace the cracked specimens of different specifications, and implement steps 1 and 2;

[0050] Step 4: Based on the data obtained in Step 1, Step 2 and Step 3, summarize the crack cracking time, crack size and loading force of crack specimens of different specifications during the continuous stress process and under different loading forces. relationship between sizes.

Embodiment 3

[0052] This embodiment provides an experimental method for treating cracks in tunnel lining structures, including the following steps:

[0053] Step 1: Select test pieces with various crack specifications in turn; install the test pieces on the test bench; the crack specifications are 1mm, 2㎜, 5㎜, 10㎜ or 20㎜.

[0054] Step 2: Deploy the repair material; the repair material is a polymer-based gel, which is prepared according to the following material and weight ratio: fly ash: metakaolin: composite activator: Portland cement: silica fume = 14:65:10 :10:1; wherein the composite activator slurry is prepared according to the following material and weight ratio: instant sodium silicate: sodium hydroxide: nano silicon dioxide = 8:1:1.

[0055] Step 3: Simulate the treatment experiment of lining cracks under different water seepage. The specific steps are: debug the water seepage at 250 ml, 500 ml, and 800 ml per minute respectively. For initial setting, load the tensile force to 1k...

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Abstract

The invention belongs to the technical field of tunnel engineering, and particularly relates to an experiment method for treatment of cracks in a tunnel lining structure. The simulation platform comprises an experiment table. A fixed hinge support is arranged on the upper surface of the experiment table, and an arched lining model steel frame is arranged at the upper end of the fixed hinge support; a worm gear loading device is arranged between both ends of the arched lining model steel frame and the experiment table, and a tension tester and a displacement meter are mounted on the worm gear loading device. The experiment method for the treatment of cracks in the tunnel lining structure adopts a curved workpiece to simulate stressing features of tunnel lining, changes direction and momentof a pulling force, changes transverse tension into curved lining tension, and more conforms to the stressing features of the tunnel structure, thereby ensuring accuracy of platform loading.

Description

[0001] This application is a divisional application of the patent application entitled "Experimental simulation platform and experimental method for crack treatment of tunnel lining structure" and application number "201610537559.7" submitted on July 8, 2016. technical field [0002] The invention belongs to the technical field of tunnel engineering, and in particular relates to an experimental method for treating cracks in tunnel lining structures. technical background [0003] Most of the current simulation methods for tunnel lining structures use indoor experiments to simulate single-factor effects on treatment effects, such as simulating crack treatment experiments in tunnel lining structures in the state of water leakage, or simulating cracks in tunnel lining structures under continuous stress cracking The treatment experiment is to test the bonding degree and material strength of the repairing material, and then compare the experimental results comprehensively, and find...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/08
CPCG01N3/08G01N2203/0003G01N2203/0017G01N2203/0066
Inventor 来弘鹏崔达康佐刘苗杨万精王军琪赖金星
Owner CHANGAN UNIV
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