摘要
成都地铁4号线清江路口站北侧附属大部分位于新近建成的成温射线立体交通系统投影下,原设计明挖方案无法实施,采取通道及风道合建暗挖结构方案。暗挖小净距群洞方案存在浅埋、大断面、群洞效应、环境复杂、工期紧张等特点。为了减少群洞效应影响,采取管棚联合导管超前支护、超前加固+径向注浆改良周围地层、分块分部错进、二次衬砌保留部分临时支护钢架等措施,结合相应附属明挖基坑,实现多工序平行交叉作业。通过上述措施,实现了快速安全施工,并且对主道交通无任何影响。
The auxiliary works of Qingjianglukou station on Line 4 of Chengdu Metro are originally designed to be con- structed by cut-and-cover method. However, most of these auxiliary works are located below the newly-built Wenshe via- duet line, therefore mining method is adopted for these auxiliary works. These close-spaced mined tunnels have such features as shallow cover, large cross-section, multiple tunneling effect, complex environment and tight construction schedule. Parallel working is achieved for the construction of the auxiliary works by using the open-cut foundation pits; countermeasures, including pipe roof supporting, forepoling, radial grouting, sequential excavation and incorporating some steel arches into the secondary lining, are adopted to minimize the multiple tunneling effect. In the end, safe and rapid construction of the auxiliary works are achieved, without influence to the operation of the viaduct line.
出处
《隧道建设》
北大核心
2015年第9期907-913,共7页
Tunnel Construction
关键词
砂卵石地层
超浅埋小净距暗挖群洞
地铁附属
sand and gravel strata
super-shallow overburden
close spacing
mined tunnels
auxiliary works
Metro
作者简介
第一作者简介：赵胜（1975-），男，湖北武穴人，1997年毕业于西南交通大学，铁道工程专业，本科，教授级高级工程师，现从事隧道与地下工程施工及技术管理工作。
