姚天波,邵长跃,赵德才,张小泳,夏云东

• 1:贵州省水利投资(集团)有限责任公司
• 2:中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室
• 3:中国科学院大学

摘要(Abstract)：

针对贵州省夹岩水利枢纽工程引水隧洞灰岩开展高围压三轴力学试验,结合声发射测试技术,探讨灰岩在达到峰值应力前的力学特性和裂纹发展规律,并利用自主开发的CASRock数值模拟软件进行了验证。试验结果表明:工程处灰岩在5～70 MPa围压作用下形成单一宏观剪切裂缝,无分支裂缝产生,峰后阶段具有明显的脆性特性,同时弹性模量和泊松比对围压不敏感;在压应力作用下声发射存在"平静期"和"活跃期",在临近峰值应力时声发射能量会出现加速释放现象。数值模拟结果与室内试验结果相一致,直观地展示了剪切裂纹扩展全过程。在此基础上,采用CASRock软件对夹岩工程隧洞进行了稳定性分析。研究结果对脆性岩体开挖支护设计具有一定的指导意义。

关键词(KeyWords)： 石灰岩;高围压;常规三轴;数值模拟;引水隧洞;夹岩水利枢纽工程

Abstract:

Keywords:

基金项目(Foundation): 中国科学院前沿科学拔尖青年科学家重点项目(QYZDB-SSW-DQC029)

作者(Author): 姚天波,邵长跃,赵德才,张小泳,夏云东

DOI: 10.13928/j.cnki.wrahe.2021.03.016

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