硬岩地铁隧道钻爆法开挖结合盾构法衬砌的施工技术  

Drill and Blast Method of Tunnel Excavation on Hard Rock

作　　者：杨书江[1] 

机构地区：[1]上海交通大学船舶与建筑工程学院,上海∥硕士研究生200030

出　　处：《城市轨道交通研究》2006年第2期42-46,共5页Urban Mass Transit

摘　　要：为解决盾构在地铁隧道硬岩插入段中掘进的技术难题,结合广州市地铁3号线大石南-汉市区间的盾构工程项目,采用了如下施工工艺:用钻爆法开挖硬岩隧道并进行初期支护;隧道底部施作弧形钢筋混凝土导向平台;盾构机空载推进拼装管片通过;管片背后与初期支护间的空隙利用吹米石与注浆结合进行回填等。这种施工工艺拓展了盾构施工的适用范围,解决了在插入段长度超过100 m、抗压强度达118 kPa的硬岩地层采用盾构掘进的施工难题。可为类似工程施工提供借鉴。Shield tunneling method is widely adopted in urban metro tunnel construction, the method, however, has its limitation. For instance, in case of long-distance hard rock stratum or in mixed （hard ＆ soft） strata,shield tunneling is usually incompetent. Excavation with drill ＆ blast method and tunnel lining with shield method was creatively adopted for the construction of Guangzhou Metro Line 3, which helped to solve successfully the problem of tunnel construction in long-distance hard rock stratum. This paper introduces this new technology, hoping that it may furnish reference for similar project construction.

关 键 词：隧道施工方法 坚硬岩石 钻爆法 盾构法 

分 类 号：U455.43[建筑科学—桥梁与隧道工程]