厄瓜多尔CCS水电站输水隧洞优化设计总结及体会
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摘要
24.8 km输水隧洞工程是厄瓜多尔CCS水电站工程控制工期的关键项目,由2台双护盾TBM施工。从工程概念设计、基本设计、详细设计直至现场施工,设计工程师转变依照规范进行工程设计的传统设计模式,分析梳理原设计方案,依据工程合同、工程地质及水文地质、现场施工环境条件及其变化等,并结合TBM施工隧洞工程技术特点,将TBM设备特性和TBM施工技术高度融合于隧洞工程设计中,对输水隧洞设计方案、隧洞施工规划方案及TBM管片类型等进行全过程动态优化设计,为TBM快速掘进,高效成洞,安全、环保施工提供便利的隧洞设计施工方案。该方案的实施,能保证CCS水电站工程质量和工期,并有效控制EPC模式下的CCS水电站工程投资。
The 24.8 km headrace tunnel is the key to CCS Hydropower Station project in Ecuador,which is constructed by two double-shield TBM.The traditional design modes of engineering concept design,basic design,detailed design and site construction are modified and improved;and the original design scheme is analyzed.The equipment characteristics and the construction technology of TBM are highly integrated into the tunnel engineering design based on engineering contract,engineering geology and hydrogeology,site construction environment conditions and its changes,and the technical characteristics of TBM construction tunnel engineering.The whole process dynamic optimization design is carried out for design scheme of the headrace tunnel,the construction planning scheme of tunnel and the type selection of TBM segments,so as to provide rational tunnel design and construction scheme for rapid and efficient TBM tunneling,safety and environmental protection construction.The implementation of the scheme can ensure the quality and construction schedule of CCS Hydropower Station,and effectively control the investment of CCS Hydropower Station under EPC mode.
The 24.8 km headrace tunnel is the key to CCS Hydropower Station project in Ecuador,which is constructed by two double-shield TBM.The traditional design modes of engineering concept design,basic design,detailed design and site construction are modified and improved;and the original design scheme is analyzed.The equipment characteristics and the construction technology of TBM are highly integrated into the tunnel engineering design based on engineering contract,engineering geology and hydrogeology,site construction environment conditions and its changes,and the technical characteristics of TBM construction tunnel engineering.The whole process dynamic optimization design is carried out for design scheme of the headrace tunnel,the construction planning scheme of tunnel and the type selection of TBM segments,so as to provide rational tunnel design and construction scheme for rapid and efficient TBM tunneling,safety and environmental protection construction.The implementation of the scheme can ensure the quality and construction schedule of CCS Hydropower Station,and effectively control the investment of CCS Hydropower Station under EPC mode.
引文
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[5]杨继华,杨风威,姚阳,等.CCS水电站引水隧洞TBM断层带卡机脱困技术[J].水利水电科技进展,2017,37(5):89.YANG Jihua,YANG Fengwei,YAO Yang,et al.Technology for TBM unblocking in a fault zone at CCSHydropower Station headrace tunnel[J].Advances in Science and Technology of Water Resources,2017,37(5):89.
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[2]洪开荣.我国隧道及地下工程近两年的发展及展望[J].隧道建设,2017,37(2):123.HONG Kairong.Development and prospects of tunnels and underground works in China in recent two years[J].Tunnel Construction,2017,37(2):123.
[3]杨继华,齐三红,郭卫新,等.CCS水电站引水隧洞双护盾TBM施工围岩分类研究[J].隧道建设,2017,37(7):788.YANG Jihua,QI Sanhong,GUO Weixin,et al.Study of surrounding rock classification of diversion tunnel of CCSHydropower Station in Ecuador bored by double-shield TBM[J].Tunnel Construction,2017,37(7):788.
[4]杨继华,齐三红,郭卫新,等.厄瓜多尔CCS水电站TBM法施工引水隧洞工程地质条件及问题初步研究[J].隧道建设,2014,34(6):513.YANG Jihua,QI Sanhong,GUO Weixin,et al.Case study of engineering geological conditions and problems in construction of headrace tunnel of CCS Hydropower Station in Ecuador by TBM method[J].Tunnel Construction,2014,34(6):513.
[5]杨继华,杨风威,姚阳,等.CCS水电站引水隧洞TBM断层带卡机脱困技术[J].水利水电科技进展,2017,37(5):89.YANG Jihua,YANG Fengwei,YAO Yang,et al.Technology for TBM unblocking in a fault zone at CCSHydropower Station headrace tunnel[J].Advances in Science and Technology of Water Resources,2017,37(5):89.
[6]水工隧洞设计规范:SL 279-2016[S].北京:中国水利水电出版社,2016.Specification for design of hydraulic tunnel:SL 279-2016[S].Beijing:China Water&Power Press,2016.