襄武段联拱隧道动态施工力学技术实现  

Realization about Dynamic Construction Mechanics in Xiang-Wu Section Twin-arch Tunnel Engineering

作　　者：张显书[1] 刘新喜[2] 刘贵应[1] 杨昌斌[1] 

机构地区：[1]中国地质大学工程学院 [2]武汉理工大学土木工程与建筑学院,湖北武汉430070

出　　处：《湖南科技大学学报（自然科学版）》2004年第4期33-36,共4页Journal of Hunan University of Science And Technology：Natural Science Edition

摘　　要：联拱隧道施工工序繁复,少则十多步,多则二十多步,且联拱隧道不同的施工工序将对隧道围岩体应力场的时空产生不同程度的影响.如何优化施工工艺,减少施工工序,缩短工期,降低工程造价就显得尤为重要.提出根据联拱隧道不同部位重要性及破坏的容易程度赋予相应的权重,再结合不同施工工序形成的隧道围岩体塑性区大小作为收益函数进行"动态施工力学"的研究,具有较高的可靠性和借鉴意义.由此提出了双联拱隧道合理的优化施工工序,用以指导高速公路襄武段双联拱隧道的施工,取得了较好的社会经济效益.图4,表2,参8.Different construction working procedure will bring different degree effect to tunnel surrounding rock mass in twin-arch tunnel engineering due to it's complicated construction technics. So it is important to optimize construction technics and reduce working procedure and cut time limit for the project and reduce engineering cost. The study on dynamic construction mechanics was carried out based on the objective function by plastic zone endued with coefficient at different position of the tunnel in this paper; the rational construction working procedure was advanced. The results are adopted to the design and construction of the twin-arch tunnel in Xiang-wu section expressway, great social and economic benefit are attained as well.4figs.,2tabs.,8refs.

关 键 词：襄武段 联拱隧道 动态施工力学 围岩体 塑性区 

分 类 号：U455[建筑科学—桥梁与隧道工程]