A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Research on Optimization of Pipe Roof Pre-Support Parameters in Closely Spaced Large Section Tunnels
In order to research the influence of the pre-support parameters of the pipe roof on the tunnel support effect of the large section and small spacing tunnels, the numerical analysis software MIDAS/GTS NX was used to model and analyze a new double-track tunnel. By changing the parameters such as pipe diameter, pipe spacing, arrangement angle and grouting thickness, the numerical simulation of various working conditions was carried out, and the influence of pipe roof parameters on the stability control effect of surrounding rock of large section and small spacing tunnels was analyzed. The results show that increasing the diameter and reducing the spacing of the pipe roof can reduce the settlement of the crown. The optimal diameter of the pipe roof is 108 mm and the pipe spacing is 0.4 m. Increasing the arrangement angle of the pipe roof has a good control effect on the deformation and failure of the middle rock pillar. Without other supporting measures, 180° can be selected as the optimal arrangement angle of the pipe roof. The optimized grouting thickness of the pipe roof is 1.0 m. When it is greater than this value, the control effect of increasing the grouting thickness on the stability of the surrounding rock is not obvious.
Research on Optimization of Pipe Roof Pre-Support Parameters in Closely Spaced Large Section Tunnels
In order to research the influence of the pre-support parameters of the pipe roof on the tunnel support effect of the large section and small spacing tunnels, the numerical analysis software MIDAS/GTS NX was used to model and analyze a new double-track tunnel. By changing the parameters such as pipe diameter, pipe spacing, arrangement angle and grouting thickness, the numerical simulation of various working conditions was carried out, and the influence of pipe roof parameters on the stability control effect of surrounding rock of large section and small spacing tunnels was analyzed. The results show that increasing the diameter and reducing the spacing of the pipe roof can reduce the settlement of the crown. The optimal diameter of the pipe roof is 108 mm and the pipe spacing is 0.4 m. Increasing the arrangement angle of the pipe roof has a good control effect on the deformation and failure of the middle rock pillar. Without other supporting measures, 180° can be selected as the optimal arrangement angle of the pipe roof. The optimized grouting thickness of the pipe roof is 1.0 m. When it is greater than this value, the control effect of increasing the grouting thickness on the stability of the surrounding rock is not obvious.
Research on Optimization of Pipe Roof Pre-Support Parameters in Closely Spaced Large Section Tunnels
Advances in Engineering res
Zhao, Gaofeng (editor) / Satyanaga, Alfrendo (editor) / Ramani, Sujatha Evangelin (editor) / Abdel Raheem, Shehata E. (editor) / Zhang, Jiong (author) / Xu, Guoyuan (author)
International Symposium on Traffic Transportation and Civil Architecture ; 2024 ; Tianjin, China
2024-09-24
10 pages
Article/Chapter (Book)
Electronic Resource
English
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