摘要
针对软弱破碎Ⅱ类围岩双连拱隧道采用三导洞施工方法的特点,阐述了其安全施工技术要点,实际施工中,就其监测内容及监测结果进行了实时分析,为隧道安全施工提供了依据,长期监控量测结果表明,该隧道结构是安全的,达到了围岩与支护结构体系安全与稳定的要求,所采用的安全施工措施以及信息化施工方法对类似工程具有指导和借鉴意义.
Considering the characteristics of Hujiaba double - arch highway tunnel constructed with three pilot tunnels excavated in advance and its large excavation width and shallow buried depth, safety construction measures were put forward such as the grouting from the ground surface, excavating by manpower in the upper bench and blasting in lower bench, blasting with small detonation dose, timely installation of the inverts, and so on. The field monitoring works focused on the following three items： （ 1 ） the displacement of surrounding rock; such as crown settlement, displacement of the ground, displacement of inner surrounding rock ; （ 2 ） the stress and stain of support structure; （ 3 ） the internal force in the mid -partition wall. During construction, monitoring data was analyzed in time. Structural material parameters were analyzed backward and modified in response to the monitoring data in order to guarantee safety construction. The engineering practice has proved the applicability and feasibility of the safety monitoring and informationization construction methods.
出处
《工程地质学报》
CSCD
2006年第4期513-517,共5页
Journal of Engineering Geology
基金
交通部行业联合科技攻关项目(200235336127)
陕西省交通科技重点项目(01-06K)
关键词
软弱围岩
连拱隧道
安全施工技术
监控量测
Soft and weak surrounding rock, Multi -arch highway tunnel, Safety construction technology, Field monitoring
