考虑施工期应力调整的浅埋地下厂房围岩破坏模式分类

doi:10.13722/j.cnki.jrme.2022.0894

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摘要围岩破坏模式研究对地下洞室群的安全施工与高效支护具有重要意义。地下厂房多采用分层开挖施工方式，在此过程中围岩体的应力状态随开挖的进行而不断调整，因此，研究施工期应力调整的地下厂房围岩破坏模式十分必要。首先通过广泛调研现有地下工程的围岩破坏模式，归纳汇总了中低地应力水平围岩破坏模式分类；然后，分析浅埋地下厂房分层开挖下围岩体的应力调整特征，并从应力调整角度提出了浅埋地下厂房考虑开挖阶段、典型部位、以及岩体基本质量(BQ值)的围岩破坏模式分类，详细阐述与分析各破坏模式的破坏现象及破坏机制；最后，将该破坏模式分类在托巴水电站地下洞室群进行了应用验证。提出的围岩破坏模式分类可为浅埋地下工程施工期围岩破坏防治提供参考。

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	陈治1
	2
	杨凡杰1
	周辉1
	周红波3
	张传庆1
	李志4
	陈四利2

关键词 ：岩石力学, 浅埋地下厂房, 围岩破坏模式, 围岩应力调整, 围岩破坏机制, 托巴水电站

Abstract：The study of surrounding rock failure mode is of great significance to the safe construction and efficient support of the underground caverns. The underground powerhouse is mostly constructed by layered excavation，and in this process，the stress state of the surrounding rock is constantly adjusted with the excavation，so it is necessary to study the surrounding rock failure mode of underground powerhouses with stress adjustment during the construction. Firstly，this paper summarizes the failure mode classification of surrounding rock in medium and low geostress levels by extensively investigating the surrounding rock failure mode in existing underground engineering. Then，the stress adjustment characteristics of the surrounding rock under layered excavation of shallow-buried underground powerhouses are analyzed. The failure mode classification of shallow-buried underground powerhouses considering excavation stage，typical parts，and rock mass basic quality(BQ) is proposed from the perspective of stress adjustment，and the phenomenon and mechanism of each failure mode are elaborated on and analyzed in detail. Finally，the failure mode classification is applied to the underground cavern group of Tuoba hydropower station. The failure mode classification of surrounding rock in this paper can provide some references for the prevention of the surrounding rock failure during the construction of shallow-buried underground engineering.

Key words： rock mechanics shallow-buried underground powerhouse failure mode of surrounding rock surrounding rock stress adjustment failure mechanism of surrounding rock Tuoba hydropower station

引用本文:

陈治1，2，杨凡杰1，周辉1，周红波3，张传庆1，李志4，陈四利2. 考虑施工期应力调整的浅埋地下厂房围岩破坏模式分类[J]. 岩石力学与工程学报, 2023, 42(6): 1434-1449.
CHEN Zhi1，2，YANG Fanjie1，ZHOU Hui1，ZHOU Hongbo3，ZHANG Chuanqing1，LI Zhi4，CHEN Sili2. Failure mode classification of surrounding rock of shallow-buried underground powerhouses considering stress adjustment during construction#br#. , 2023, 42(6): 1434-1449.

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http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2022.0894 或 http://rockmech.whrsm.ac.cn/CN/Y2023/V42/I6/1434

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