山区软岩大跨大断面隧道撑索转换施工技术  

Construction of Support Replacement with Cable in Large-span and Large-section Tunnel in Mountain Area with Soft Rock

作　　者：徐宏鹏 

机构地区：[1]中铁十三局集团第二工程有限公司,广东深圳518083

出　　处：《施工技术》2014年第10期123-126,共4页Construction Technology

基　　金：铁道部科技研究开发计划资助项目(2010G016-H)

摘　　要：对大跨大断面隧道,特别是在浅埋且围岩地质条件较差的情况下,为保证施工过程中的安全,往往设置若干临时支撑,待到施作二次衬砌前,拆除临时支撑工序成为影响围岩稳定与初支受力的重要环节。以乌蒙山2号隧道出口四线车站隧道浅埋段为例,通过现场实际施工,对采用预应力锚索支护方法减小甚至消除拆撑带来的结构体系受力转换风险进行了研究。Temporary supports were generally applied in large cross-section tunnels, especially those that are shallowly buried and in poor geological conditions. Before the construction of the final lining, removing the temporary support becomes an important factor that affects the stability of the surrounding rock stability and loading state of the primary support. Based on the four-line railway station tunnel located in the exit section of the Wumeng Mountain second tunnel, the risk of using pre-stressed anchor cables to replace the temporary support was studied.

关 键 词：隧道工程 软岩 铁路 支撑 

分 类 号：U455.49[建筑科学—桥梁与隧道工程]