穿黄工程盾构隧洞拼装式管片设计  

Assembled segment design for shield tunnel crossing Yellow River

作　　者：张传健 符志远 邓家林 

机构地区：[1]长江勘测规划设计研究院枢纽设计处,湖北武汉430010

出　　处：《人民长江》2011年第8期37-40,69,共5页Yangtze River

基　　金："十一五"国家科技支撑计划项目"复杂地质条件下穿黄隧洞工程关键技术研究"(2006BAB04A11)

摘　　要：南水北调中线穿黄河工程采用盾构隧洞方案,其外衬为拼装式管片结构,内径7.9 m,厚40 cm。介绍了管片结构的主要设计方案。针对实际应用中出现的管片错台现象,指出邻接块与封闭块拼装间隙过大是主要原因之一。在对封闭块和邻接块接缝进行调整后,提出了新的管片设计方案。同时,对于原设计方案,提出了设置拼装限位销的改进措施。经优化改进后,两种方案均能满足盾构施工管片安装要求。所提管片接缝设计方案具有创新性,可供类似工程参考。The shield tunnel is adopted in the Yellow River Crossing Project of South-to-North Water Diversion（SNWD）,the outer lining is of assembled segment type with an inner diameter of 7.9 m and a thickness of 40cm.We present the design scheme of the segment structure.In view of the segment dislocation in construction,the large gap between adjacent block and enclosure block is one of the main reasons.A new segment design scheme is proposed after an adjustment of joint between the blocks.Meanwhile,based on the original segment design,assembling restrictors is presented as the improvement measure.After design optimization,the two schemes can meet the demands of shield tunnel construction.

关 键 词：盾构隧洞 管片 K块稳定 接缝构造 错台 限位销 南水北调中线工程 

分 类 号：TV67[水利工程—水利水电工程]