交叉隧道稳定性监测与分析  

Monitoring and analysis of stability on intersection tunnel

作　　者：罗从双[1] 许昌[1] 胡延宇[2] 刘永兴[1] 杨磊[1] 肖建遥 栾海敏 

机构地区：[1]河南城建学院交通运输工程学院,河南平顶山467036 [2]机械工业勘察设计研究院有限公司勘察一公司,陕西西安710043

出　　处：《河南城建学院学报》2016年第2期53-57,共5页Journal of Henan University of Urban Construction

基　　金：河南省高等学校重点科研项目(15A410003);河南城建学院2014青年骨干教师培育项目;河南城建学院2015大学生科技创新项目

摘　　要：为研究纵横垂直交叉隧道的稳定性问题,采用现场监测的方法研究新旧隧道之间的沉降变形情况。通过现场监测,新建隧道的施工使既有隧道在交叉点区域产生了沉降,最大沉降量达6 mm。新建隧道内部的围岩、钢筋和混凝土也表现出了轻微的变形,应力变化主要集中在拱腰,变形主要集中在拱顶。隧道交叉区域的围岩条件、爆破施工方法、下穿小间距的施工方案是导致沉降变形的主要因素。通过对围岩的超前加固、支护结构的加强等措施可以有效地控制了隧道和围岩的变形沉降。In order to study on the stability problem of the intersection tunnel,this project adopts the experiment method to monitor the settlement deformation situation between the old and new tunnel. Through the field monitoring,the settlement is generated in the tunnel intersection by the new tunnel construction process,the maximum settlement amount is 6mm. In the new tunnel,the surrounding rock,steel and concrete also shows a slight deformation,stress changes are mainly concentrated in the arch,deformation mainly concentrated in the vault. Surrounding rock condition,blasting construction method,and the construction with small spacing under old the crossing tunnel in the crossing area are the main factors leading to the settlement. The construction of the tunnel crossing area should be combined with the surrounding rock and tunnel requirements,the reasonable construction scheme is chosen,the mutual influence between the old and new line construction and the occurrence of the accident disaster are avoided.

关 键 词：交叉隧道 地下工程 稳定性 监测分析 

分 类 号：U456.3[建筑科学—桥梁与隧道工程]