Tunnel surrounding rock concrete spray layer corrosion simulation test method
A simulation test, concrete technology, applied in the direction of weather resistance/light resistance/corrosion resistance, measuring devices, instruments, etc., can solve problems such as large deviation and affect the test quality, achieve simple installation and layout, improve accuracy and stability, Effects of accelerated corrosion testing operations
Active Publication Date: 2021-11-30
CHINA RAILWAY 20 BUREAU GRP
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[0003]
In the traditional corrosion process, the sample is directly soaked in the container containing the corrosive liquid, and the results obtained have a large deviation from the test results. For the binary body of the tunnel surrounding rock-concrete sprayed layer, many factors will Affect the final corrosion results, such as the temperature of the corrosive liquid, the surrounding pressure and the stirring method, etc., thus affecting the quality of the test
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[0079] like Figure 1 to Figure 4 As shown, the device used in the present invention includes a corrosion solution simulation box, a nitrogen supply mechanism, a carbon dioxide supply mechanism and a monitoring module. 9. The box cover 14 at the top and the rotating part arranged at the bottom of the corrosion-resistant box body 9 for placing the concrete sprayed layer test piece 19 of the tunnel surrounding rock. The corrosion-resistant box body 9 is provided with a temperature regulating component, and the carbon dioxide supply mechanism includes The carbon dioxide tank body 10 is connected with the delivery pump 11 connected with the carbon dioxide tank body 10, the delivery pump 11 is connected with the corrosion-resistant casing 9, and the nitrogen gas supply mechanism includes a nitrogen gas tank body 12, and the nitrogen gas tank body 12 and the corrosion-resistant The corrosion box 9 is connected, and the corrosion-resistant box 9 is provided with two sets of circulati...
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The invention discloses a tunnel surrounding rock concrete spray layer corrosion simulation test method. The method comprises the following steps: 1, preparing a tunnel surrounding rock concrete spray layer test piece; 2, preparing a corrosion solution; 3, placing a test piece and injecting a corrosion solution; 4, adjusting a test environment and confining pressure; and 5, carrying out a corrosion simulation test on the tunnel surrounding rock concrete spray layer test piece. The method is reasonable in design, the temperature and the confining pressure of the actual environment where the tunnel is located can be simulated, the corrosion-resistant solution state of the stratum where the tunnel surrounding rock concrete spray layer test piece is located can be simulated, and the accuracy and the stability of the tunnel surrounding rock concrete spray layer corrosion solution simulation test are improved.
Description
technical field [0001] The invention belongs to the technical field of tunnel surrounding rock concrete sprayed layer simulation tests, and in particular relates to a tunnel surrounding rock concrete sprayed layer corrosion simulation test method. Background technique [0002] With the widespread promotion of the "New Austrian Method", research on shotcrete for tunnels has made great progress. The research on the bond performance between concrete and surrounding rock is not deep enough, and the relevant research mainly focuses on the shotcrete material itself. Corrosive water) effect. Therefore, it is particularly urgent and necessary to carry out the bond performance test of the tunnel surrounding rock-concrete sprayed layer under the action of corrosive water and the research on its deterioration mechanism. In view of this, it is an essential key link to artificially simulate the environment of the tunnel surrounding rock-concrete sprayed layer during the test process. H...
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IPC IPC(8): G01N17/00G01N19/04
CPCG01N17/00G01N19/04
Inventor 李曙光王恩龙任少强吴应明谢江胜仲维玲王平安王存宝刘博杨星智
Owner CHINA RAILWAY 20 BUREAU GRP