摘要
成都地铁1、2号线成功地采用了盾构法施工,但由于成都地质条件以高富水、高卵石含量著称,到现在为止还存在刀具消耗成本大、换刀困难、地表易坍塌及刀盘和螺旋输送机磨损严重等实际问题。文章通过对成都富水砂卵石的地质特点和现用盾构设备的优缺点的分析,提出了将盾体进行适当改进的设想:刀盘由面板式改变为辐条式、螺旋输送机由轴式改变为带式、对卵石的处理方式由破碎为主变为全部排出,这样将可以大大降低施工成本,解决地表易坍塌的问题,创新改进后的盾构设备配置将更适合成都地铁盾构施工。
The shield construction technique was successfully used in the Chengdu metro lines 1 and 2. Because of the geological conditions of water-rich cobblestone, this project suffered from a high cost of cutter consumption, difficult cutter changing, surface subsidence, and serious wear to the cutter head and screw conveyor. By analyzing the geological features and advantages and disadvantages of the devices currently used on shield machines, a modification plan for the shield is suggested, including changing from a breasting pl belt for the conveyor, and from main breaking to total discharging, whic ate to a spoke for the cutter head, from a shaft to h resulted in greatly reduced construction costs.
出处
《现代隧道技术》
EI
北大核心
2013年第1期34-39,共6页
Modern Tunnelling Technology
关键词
成都地质
坍塌
超挖
盾构选型
刀具配置
Geology in Chengdu
Collapse
Over-excavation
Shield selection
Cutters arrangement
