摘要
富水软弱地层斜井施工易引发围岩塌方、大变形和突涌水等地质灾害,威胁施工人员和机械设备安全,并延滞总体工程进度。以滇中引水工程香炉山隧洞5号施工支洞工程建设实践为背景,分析得出斜井的主要工程地质问题是围岩坍塌、软岩大变形及涌水突泥。结合围岩变形和支护结构受力监测成果论述了围岩的失稳破坏机制,主要分为顶拱坍塌、软弱带挤压外鼓、涌水突泥3种类型。基于对围岩破坏过程及其内蕴机理的认识,采用工程类比、现场应用效果反馈的方法,提出了针对不同失稳破坏机制的的斜井围岩灾害处置措施和稳定控制技术。相关成果可为类似地质条件下的斜井围岩稳定性控制提供借鉴。
The construction of inclined shafts in water-rich and weak strata is easy to cause geological disasters such as surrounding rock collapse,large deformation and water inrush,which will threaten the safety of construction workers and equipment and delay the overall project progress.Based on the construction practice of No.5 inclined shaft of Xianglushan tunnel project,a controlling project in the water diversion of central Yunnan Province,the main geological problems of the inclined shaft revealed by the excavation were clarified as the collapse of the top arch,the outer bulge in the weak zone and the inrush of water.Based on the understanding of the surrounding rock failure process and its underlying mechanism,engineering analogy and on-site feedback were used to propose geological disaster disposal measures and stability control technologies for different failure mechanisms.Relevant research results can provide references for the stability control of surrounding rock in inclined shafts under similar geological conditions.
作者
梅争贵
李建贺
郭勇
刘睿营
欧阳林
MEI Zhenggui;LI Jianhe;GUO Yong;LIU Ruiying;OUYANG Lin(Administration Bureau of Water Diversion Engineering of Central Yunnan Province,Kunming 650051,China;Changjiang Survey Planning Design and Research Co.,Ltd.,Wuhan 430010,China;College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098,China)
出处
《人民长江》
北大核心
2023年第6期147-154,共8页
Yangtze River
基金
云南省重大科技专项计划资助项目(202102AF080001)
岩土力学与工程国家重点实验室开放基金项目(Z018016)。
关键词
斜井
软弱破碎围岩
富水地层
围岩稳定
inclined shaft
weak and broken surrounding rock
water-rich strata
surrounding rock stability
