东篱科研大数据发现系统（DRDS）

位置：成果数据库 > 期刊 > 期刊详情页

深部试验隧洞围岩脆性破坏及数值模拟

ISSN号：1000-6915
期刊名称：岩石力学与工程学报
时间：0
页码：2063-2068
语言：中文
分类：U45[建筑科学—桥梁与隧道工程;交通运输工程—道路与铁道工程]
作者机构：[1]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,湖北武汉430071, [2]中国水电顾问集团华东勘测设计研究院,浙江杭州310014, [3]二滩水电开发有限责任公司,四川成都610021
相关基金：国家重点基础研究发展计划（973）项目（2010CB732006）; 国家自然科学基金资助项目（50709037 50979104）
相关项目：深埋隧洞围岩安全性的超声评价理论及应用研究

关键词：隧道工程, 深埋隧洞, 脆性破坏机制, 数值模拟, tunnelling engineering, deep tunnels, brittle failure mechanism, numerical simulation

中文摘要：

围岩破坏模式和机制的深入认识和把握、围岩破坏程度的合理评价对于深部地下工程围岩稳定性的分析和调控至关重要。锦屏二级水电站深部地下试验隧洞即为针对该问题而建设的国际上埋深最大（2500m）的地下试验隧洞之一。通过大理岩室内试验结果的分析,深入研究和认识大理岩基本工程力学特性。基于此,分析试验洞开挖后围岩的破坏模式和机制,应用脆性岩体本构模型（RDM）、数值模拟方法和FAI评价方法分析开挖后围岩脆性破坏的范围和深度,并与现场揭露情况进行对比。分析结果较好地体现高应力条件下大理岩的脆性破坏特征,达到对围岩破坏程度合理把握的目的,为引水隧洞开挖期间支护参数的设计和施工处理措施的制定奠定坚实的基础。

英文摘要：

The brittle failure modes and mechanism of surrounding rocks should be studied and understood primarily.Furthermore,the rational evaluation of the brittle failure degree is crucial importance for stability analysis and control of surrounding rock mass in deep underground engineering.The test tunnels in Jinping II Hydropower Station are exactly constructed for these problems,the buried depth of 2 500 m is the maximum in the world.Based on the analysis of the experimental results,the engineering mechanical features of the marble T2b are studied.Then the failure modes and mechanism of the surrounding rock mass in the test tunnels are analyzed.And the range and depths of the failure zone in the test tunnels are calculated by numerical simulation method in which the constitutive model,RDM,for hard brittle marble and the FAI evaluation method are adopted.Finally,comparison between the calculated results and those revealed in the test tunnels is carried out.And the results obtained through comparison are satisfied.This study lays the solid foundation for the design of support parameters and establishment of the constructing measures in the excavation process of the diversion tunnels in this project.

同期刊论文项目