摘要
长距离跨流域调水工程是解决水资源短缺与社会经济高质量发展之间矛盾的必然选择,由于受到地形和地质条件的限制,通常需要跨活动断裂建设长距离输水隧洞。为了全面、准确地认识活动断层的错断对输水隧洞变形破坏特性的影响,以滇中引水工程的关键控制性工程——香炉山输水隧洞为例,基于隧洞关键部位的位移与相对变形、最大主应力、纵向等效内力等指标,对断层带倾向、夹角、宽度、岩体力学参数等因素进行参数分析。结果表明:断层带走向与隧洞夹角以及断层带倾角越大,对隧洞衬砌变形受力状态越有利,当隧洞必须要跨越活动断裂时,其相交角度较大为宜;在相同错动量的前提下,断层宽度越小,对隧洞变形越不利;在断裂带两侧岩体质量条件和错动量不变的前提下,随着断裂带岩体质量的提升,隧洞受到的错动作用更加显著。研究成果可为相关隧洞工程建设提供参考。
The long-distance inter-basin water transfer project is an inevitable choice to solve the contradiction between water shortage and high-quality social and economic development.However,due to the constraints of topography and geological conditions,it is necessary to construct long-distance water conveyance tunnels across active faults.To understand the influence of the dislocation of the active faults on the deformation behavior of tunnel engineering,we took the Xianglushan Water Transfer Tunnel,the key control project of the Central Yunnan Water Diversion Project,as an example.Parameter analysis on factors such as different fault zone inclinations,angles,widths,and rock mass mechanical parameters was carried out,based on the displacement,relative deformation,maximum principal stress,longitudinal equivalent internal force and other indicators of each key part of the tunnel.The results showed that:①The larger the angle between the strike of the fault zone and the tunnel axis,as well as the inclination angle of the fault,the more favorable the deformation and stress state inside the tunnel lining.When the tunnel crosses active faults,a larger intersection angle is appropriate.②Given the same dislocation value,the smaller the fault width is,the more unfavorable it is for the tunnel.③When the rock mass on both sides of the fault zone is of the same quality and the fault dislocation value remains unchanged,the better quality of the fault rock mass,the more obvious the dislocation effect on the tunnel.These research results can provide meaningful support for constructing the related tunnel engineering.
作者
赵利鹏
李坚
高仝
周光新
崔臻
ZHAO Lipeng;LI Jian;GAO Tong;ZHOU Guangxin;CUI Zhen(Yunnan Dianzhong Water Diversion Engineering Co.,Ltd.,Kunming 650000,China;Dali Branch,Administration Bureau of Water Diversion Engineering in Central Yunnan Province,Kunming 650205,China;State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics of CAS,Wuhan 430071,China;University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《人民长江》
北大核心
2023年第11期182-189,201,共9页
Yangtze River
基金
国家自然科学基金项目(52079133)
云南省重大科技专项计划项目(202102AF080001)
中国科学院青年创新促进会项目(2019323)。
关键词
隧洞变形
走滑断层
活动断裂
参数分析
香炉山隧洞
滇中引水工程
tunnel deformation
strike-slip fault
active fault
parameter analysis
Xianglushan Tunnel
water diversion engineering in central Yunnan Province
