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Language:English

Paper Publications

Title of Paper:深埋硬岩隧洞落底开挖诱发围岩损伤破坏研究

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Date of Publication:2014-02-15

Journal:地下空间与工程学报

Included Journals:PKU、ISTIC、CSCD

Volume:10

Issue:1

Page Number:36-42

ISSN No.:1673-0836

Key Words:深埋硬岩;落底;围岩损伤;数值分析

Abstract:为深入研究深埋硬岩隧洞在落底开挖前后的围岩损伤破坏情况,结合锦屏二级水电站引水隧洞实际资料,借助RFPA有限元数值分析软件,研究岩体微破裂萌生、发育和扩展的演化机制.分析表明,在落底开挖过程中,由于开挖卸载,形成二次分布的应力场,在高应力和材料物性劣化的共同作用下,落底前的损伤会进一步发展,进而迫使局部应力场不断调整,诱发损伤向深处演化,同时引发已支护部分围岩出现损伤破坏.研究成果为更好地理解高应力下深埋硬岩隧洞的围岩损伤破坏模式提供重要参考.

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