摘要
以重庆地铁某暗挖地铁车站为研究对象,通过陡倾岩层地质条件的定性与定量分析,从施工工法、支护参数以及工艺控制等方面采取综合控制措施,并将理论分析与监测数据相结合,全面论证了各阶段车站的安全性,其方法可行、结论可靠,对类似工程的设计、施工具有一定的参考意义。研究结论表明:变大跨为小跨的思路,有效缩小楔形岩体体量;适当加大初期支护厚度,局部增设长系统锚杆,形成组合梁结构,提高了支护体系的前期刚度;通过工艺控制,减少层面摩擦力、黏聚力损失,充分发挥了围岩自身承载力。
This paper took Chongqing subway as the research subject.During its construction,it employed the method of qualitative and qualitative analysis to know the geological conditions of the steeply inclined area,and made integrated measures in the aspects of construction method,support parameter and construction technique,and combined theoretical analysis and monitoring data to have a overall analysis of the safety of each station.The results show the methods are feasible,and the conclusions are reliable,and it can provide reference for similar projects.The research conclusions are as follows:firstly,the idea of changing long span into small span can effectively reduce wedge rock mass;secondly,appropriate increase in initial liner thickness and partial addition in long system rock bolt can improve the early stage stiffness of the supporting system;finally,bearing capacity of surrounding rock can have a full play by reducing the friction between layers and reducing cohesion loss through technical control.
作者
曹伟
李慧
Cao Wei;Li Hui(China Railway First Survey and Design Institute Group Ltd.,Xi’an 710043,P.R.China;Shanxi Railway and Underground Traffic Engineering Key Laboratory(FSDI),Xi’an 710043,P.R.China)
出处
《地下空间与工程学报》
CSCD
北大核心
2020年第S01期115-120,146,共7页
Chinese Journal of Underground Space and Engineering
关键词
陡倾岩层
暗挖车站
楔形岩体
稳定性
长系统锚杆
steeply inclined strata
underground excavation station
wedge rock
stability
long system rock bolt
