基于能量释放的隧道抗错结构计算方法研究

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摘要 研究目的: 针对高烈度区断层错动过程中隧道结构的稳定性问题,从能量释放和耗散角度探讨隧道抗错断设计计算方法。首先,根据最大错动量计算围岩达到稳定时可释放的应变能;其次,根据材料的荷载-挠度曲线及塑性区范围内单位应变能确定衬砌结构及围岩可吸收的应变能;最后,在给定的安全度条件下对“围岩-隧道”系统的稳定性给予判别。
研究结论: (1)基于能量释放及耗散原理,推演黏滑断层隧道错动时可释放应变能的计算公式,建立基于可释放应变能的隧道衬砌结构抗错设计计算方法,可用于隧道抗错断设计;(2)基于可释放应变能的隧道衬砌结构抗错设计计算方法结果较规范安全度提升17%以上,偏于安全;(3)“SBFRC+交错设置减错缝+减震层+初支扩大拱脚+二衬拱脚增厚”,可作为实际跨断层段隧道抗错实施方案。

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	袁金秀
	王道远
	崔光耀
	田小路
	杨彦岭
	杨杰
	章浩天

关键词 ：高烈度, 断层, 隧道, 能量释放, 抗错断, 计算方法

Abstract：Research purposes: Aiming at the stability of tunnel structure in the process of fault dislocation in high intensity area, the design and calculation method of anti-dislocation is discussed from the perspective of energy release and dissipation. Firstly, the strain energy that can be released when the surrounding rock reaches stability is calculated according to the maximum dislocation momentum; Secondly, the absorbed strain energy of lining structure and surrounding rock is determined according to the load deflection curve of material and the unit strain energy within the plastic zone; Finally, the stability of "surrounding rock-tunnel" system is determined under the given safety condition.
Research conclusions: (1) Based on the principle of energy release and dissipation, the calculation formula of the releasable strain energy during the dislocation of the tunnel with stick slip fault is deduced, and the calculation method of the anti-dislocation design of the tunnel lining structure based on the releasable strain energy is established, which can be used in the anti-dislocation design of the tunnel. (2) The results of the anti-dislocation design and calculation method of tunnel lining structure based on releasable strain energy are more than 17% higher than the standard safety, which is safer. (3) "SBFRC+staggered joint reduction+damping layer+expanded arch foot of initial support+thickening of secondary lining arch foot" can be used as the anti-dislocation implementation scheme of actual tunnel crossing fault section.

Key words： high intensity faults tunnel energy release fault resistance computing method

收稿日期: 2022-01-21

PACS:

U45

基金资助:河北省自然科学基金资助项目(E2021419001)

作者简介: ^**袁金秀,1980年出生,女,副教授。

引用本文:

袁金秀, 王道远, 崔光耀, 田小路, 杨彦岭, 杨杰, 章浩天. 基于能量释放的隧道抗错结构计算方法研究[J]. 铁道工程学报, 2022, 39(11): 70-74.
YUAN Jinxiu, WANG Daoyuan, CUI Guangyao, TIAN Xiaolu, YANG Yanling, YANG Jie, ZHANG Haotian. Research on the Calculation Method of Tunnel Fault Resistant Based on Energy Release. Journal of Railway Engineering Society, 2022, 39(11): 70-74.

链接本文:

https://tdgcxb.crec.cn/CN/ 或 https://tdgcxb.crec.cn/CN/Y2022/V39/I11/70

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