E3S Web Conf.
Volume 272, 20212021 International Conference on Environmental Pollution and Governance (ICEPG 2021)
|Number of page(s)||7|
|Section||Environmental Governance and Solid Waste Treatment and Resource Utilization|
|Published online||14 June 2021|
Discussion On The Optimization of Circumferential Distance Of The System Bolt In A Highway Tunnel
China Merchants Chongqing Communications Technology Research & Design Institute Co., Ltd., Chongqing, 400067, P.R.China
2 National Engineering Laboratory For Highway Tunnel Construction Technology, Chongqing 400067 P.R.China
* Corresponding author: email@example.com
The setting of circumferential distance of system anchor rod in highway tunnel is related to the safety of tunnel structure, and also affects the project cost. The “code for design of highway tunnels” issued in 2018 also adjusted the circumferential spacing arrangement of the system bolts of the tunnel. Based on a highway tunnel project, the circumferential spacing of system bolts in deep buried section of grade V surrounding rock is adjusted from 0.8m to 1.2m, and the numerical simulation and comparative analysis before and after the optimization of bolt spacing are carried out. The field monitoring and measurement data show that the surrounding rock deformation after adjustment has little effect, and the cavern is stable as a whole, which can guide the optimization implementation of subsequent sections.
© The Authors, published by EDP Sciences, 2021
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