作　　者： (侯凯文）; (王崇）; (江杰）; (杨钢锋）; (欧孝夺）; (唐迎春）;

机构地区： 广西大学土木建筑工程学院,广西南宁530004

出　　处： 《隧道建设》 2017年第8期1037-1045,共9页

摘　　要： 盾构的选型与设计对地铁区间盾构施工具有重要意义,其选型的合适与否直接影响到盾构施工的成败。针对南宁地铁2号线所遇到的黏土层、硬岩层、夹杂碎石砂砾层、上软下硬地层及岩溶地层等多种地层相结合的特殊复杂地质条件,提出盾构选型总体要求,开展对盾构动力设备、刀盘、刀具等关键部位的选型研究,同时优化防泥饼、螺旋输送机、小倾角皮带机和同步注浆设计方案以及地质加固方案。通过实际掘进参数和地表沉降数据分析,结果表明盾构设备选型及优化设计方案对南宁地区特殊复杂地质条件适应性良好。 The type selection design of shield is very important to shield construction of metro; it directly affects the success of the construction. The Line No. 2 of Nanning metro crosses complex geological conditions,i. e. clay,hard rock,gravel,upper-soft and lower-hard stratum and karst stratum. As a result,the general requirements for shield type selection are put forward in terms of power device,cutterhead and cutter; meanwhile,the design of mud cake prevention,screw conveyor,small angle belt conveyor and synchronous grouting system and geological reinforcement methods are optimized. Finally,the actual tunneling parameters and ground surface settlement data show that the adaptability of the shield machine in Nanning area is good.

关 键 词： 南宁地铁 盾构选型 岩溶地层 硬岩层 砂砾层 上软下硬地层