湿陷性黄土地区公路隧道工程的超前支护施工分析  

Analysis of Advance Support Construction of Highway Tunnel Engineering in Collapsible Loess Area

作　　者：丁庆祝 DING Qingzhu(China Railway 18th Bureau Group Construction and Installation Engineering Co.,Ltd.,Tianjin 300000,China)

机构地区：[1]中铁十八局集团建筑安装工程有限公司,天津300000

出　　处：《成都工业学院学报》2023年第4期22-26,共5页Journal of Chengdu Technological University

摘　　要：为探讨湿陷性黄土地区公路隧道工程的超前支护施工要点,结合武家堡隧道实际情况,立足施工方案的选择,分析了超前支护施工的方法及要点。结果表明,在公路隧道工程施工中经常会遇到湿陷性黄土,其含水量大,风险系数高,容易引起安全事故。需要采取有效的超前支护施工技术加固围岩,以保证围堰结构的稳定性,为隧道开挖、渣土运输、衬砌等提供良好条件。绝大数情况下,仅凭一种超前支护技术可能无法满足施工要求,需要结合不同隧道的地质条件,采取对应的支护技术,才能保证隧道工程施工任务顺利完成,从而打造出高品质的公路隧道工程。In order to discuss the key points of advance support construction of highway tunnel engineering in collapsible loess areas,combined with the actual situation of Wujiapu Tunnel,based on the selection of construction plan,the method and key points of advance support construction were analyzed.The results show that collapsible loess is often encountered in the construction of highway tunnels,with large water content and high risk coefficient,which is easy to cause safety accidents.Therefore,it is necessary to adopt effective advance support construction technology to reinforce the surrounding rock to ensure the stability of the cofferdam structure and provide good conditions for tunnel excavation,muck transportation,and lining.In the vast majority of cases,only one advance support technology may not meet the construction requirements,the geological conditions of different tunnels should to be combined and corresponding support technologies are adopted to ensure the smooth completion of the tunnel engineering construction tasks,so as to create high-quality road tunnel engineering.

关 键 词：湿陷性黄土 超前大管棚 超前小导管 药卷锚杆 

分 类 号：U455.4[建筑科学—桥梁与隧道工程]