小半径曲线地铁隧道盾构施工技术

针对上海市轨道交通9号线一期工程R413东西出入线的小半径盾构隧道施工的综合难题，采用数值模拟分析、文献调研等方法，对盾构机选择、管片选择、管片壁后注浆加固、临时纵向加强肋、加强螺栓复紧、盾构推进轴线预偏、盾构测量与姿态控制、盾构施工参数选择、土体损失及二次注浆、盾构纠偏量及盾尾与管片间的间隙控制等问题进行研究，并提出详细的施工和设计措施；进而对盾构进入缓和曲线后，盾构卡壳、盾尾管片外弧面碎裂、盾尾衬砌管片角部碎裂等施工难题给出解决措施，保障了小半径盾构隧道施工的顺利进行，对今后类似工程施工有一定的借鉴作用。

Shield Boring Technology for Metro Tunnels on Curves with Small Radius

On basis of the problems met in shield boring of the small-radius curve section of the first stage R413 project on line 9 of Shanghai Metro,the author mainly studies on shield machine and segment selection,backfilling grouting behind the segments,temporary longitudinal strengthening rib,segment bolt re-tightening,offsetting of shield boring axis in advance,measurement and attitude control of shield machine,shield boring parameter selection,ground loss and secondary grouting,boring direction correcting,contr...