大伙房输水隧洞混凝土衬砌层的地震响应分析
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摘要
文章结合大伙房输水隧洞二期工程,考虑围岩与衬砌层、水体与衬砌层的相互作用,采用现代岩体力学模型,对其进行模态分析和时程分析,分析了混凝土衬砌层的动力特性和地震响应,探讨了埋深、衬砌厚度、围岩弹性模量和水体等因素对混凝土衬砌层地震响应的影响;并指出衬砌层的环向应力是地震破坏作用的主导,埋深和围岩弹性模量是影响衬砌层地震性能的重要因素,衬砌厚度和水体的影响较小。
Based on the 2nd phase Dahuofang water diversion tunnel project,taking the interaction of surrounding rock and lining,water and lining into consideration,modern rock mechanical models were adopted to conduct modal analysis and time-history analysis,and the dynamic characteristics of concrete lining and seismic responses were also analyzed.Meanwhile the influence of overburden,lining thickness,elastic modulus of surrounding rocks and water on seismic responses of concrete lining was discussed.Results showed that the lining hoop stress was the main destructive factor in earthquake.While overburden and rock elastic modulus were the important factors affecting seismic performance of lining,and it will be less affected by lining thickness and water.
Based on the 2nd phase Dahuofang water diversion tunnel project,taking the interaction of surrounding rock and lining,water and lining into consideration,modern rock mechanical models were adopted to conduct modal analysis and time-history analysis,and the dynamic characteristics of concrete lining and seismic responses were also analyzed.Meanwhile the influence of overburden,lining thickness,elastic modulus of surrounding rocks and water on seismic responses of concrete lining was discussed.Results showed that the lining hoop stress was the main destructive factor in earthquake.While overburden and rock elastic modulus were the important factors affecting seismic performance of lining,and it will be less affected by lining thickness and water.
引文
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[2]张军伟,梅志荣,高菊茹,等.大伙房输水工程特长隧洞TBM选型及施工关键技术研究[J].现代隧道技术,2010,47(5):1~10Zhang Junwei,Mei Zhirong,Gao Juru,et al.Study on TBM Type-selection and Key Technologies in Dahuofang Water DiversionTunnel[J].Modern Tunnelling Technology,2010,47(5):1~10
[3]陈健云,刘金云.地震作用下输水隧洞的流固耦合分析[J].岩土力学,2006,27(7):1077~1082Chen Jianyun,Liu Jinyun.Fluid-structure Coupling Analysis of Water-conveyance Tunnel Subjected to Seismic Excitation[J].Rock and Soil Mechanics,2006,27(7):1077~1082
[4]郭磊,傅鹤林,欧阳刚杰,谭鑫.考虑流固耦合效应的水下隧道岸坡深基坑开挖数值模拟[J].现代隧道技术,2010,47(4):12~19Guo Lei,Fu Helin,Ouyang Gangjie,Tan Xin.Numerical Simulation of Pit Excavation of a Subaqueous Tunnel Considering Fluid-solid Coupling Effect[J].Modern Tunnelling Technology,2010,47(4):12~19
[5]陈宇,张庆贺,朱继文,姚海明.双圆盾构穿越下立交结构的流-固耦合数值模拟[J].岩土力学,2010,31(6):1950~1955,1964Chen Yu,Zhang Qinghe,Zhu Jiwen,Yao Haiming.Coupled Fluid-mechanical Analysis of DOT Shield Tunnel Constructionbeneath Adjacent Existing Underpass[J].Rock and Soil Mechanics,2010,31(6):1950~1955,1964
[6]张鸿,毕继红,张伟.地铁隧道地震反应非线性分析[J].地震工程与工程振动,2004,24(6):146~153Zhang Hong,Bi Jihong,Zhang Wei.Nonlinear Analysis of Seismic Response of Metro Tunnel[J].Earthquake Engineering andEngineering Vibration,2004,24(6):146~153
[7]徐则民,黄润秋,王士天.隧道的埋深划分[J].中国地质灾害与防治学报,2000,11(4):5~10Xu Zemin,Huang Runqiu,Wang Shitian.Tunnel Classifying in Light of Depth(i.e Thickness of Overburden)[J].The ChineseJournal of Geological Hazard and Control,2000,11(4):5~10
[8]李晓克,赵顺波,赵国藩.单环预应力作用下混凝土压力管道受力分析研究[J].大连理工大学学报,2004,44(2):277~283Li Xiaoke,Zhao Shunbo,Zhao Guofan.Theoretical Analysis of Prestressed Concrete Penstock under Uni-ring-like Prestress[J].Journal of Dalian University of Technology,2004,44(2):277~283
[9]范鹏贤,王明洋,李文培.岩土介质中圆形隧洞围岩压力理论分析进展[J].现代隧道技术,2010,47(2):1~7,23Fan Pengxian,Wang Mingyang,Li Wenpei.Progress in Theoretical Analysis of Ground Response to Circular Excavations in Rock&Soil Medium[J].Modern Tunnelling Technology,2010,47(2):1~7,23
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