摘要
西南艰险山区铁路选线受地形限制,往往以隧道形式通过。山区隧道埋深大、区域构造强烈、地质条件复杂,高地应力、较强残余构造应力、断层破碎带、涌水等问题普遍存在。复杂的地质环境加上施工过程中的诸多干扰因素极易引起围岩大变形,大变形不仅增加施工难度,处置措施不当还将引起的隧底变形和无砟轨道上拱等问题。针对这一问题,本文以现有隧道软岩大变形的机理为讨论依据,着重分析了大变形对隧道和轨道工程的影响,指出了现行设计接口中的局限性,提出了相应的解决措施和建议。
Railway in southwest dangerous mountainous areas is limited by topography for location,and often passes through tunnels.For tunnels in mountainous areas,deep-buried depth,strong regional structures,complex geological conditions,high ground stress,strong residual tectonic stress,fault fracture zones,water gushing and other problems are common.Complicated geological environment and many interference factors during the construction can easily cause large deformation of surrounding rock,which not only increases the difficulty of construction,but also leads to deformation of the tunnel bottom and arch on ballastless track due to improper treatment measures.To solve this problem,based on the mechanism of large deformation of soft rock in existing tunnels,in the paper,the influence of large deformation on tunnel and track construction is emphatically analyzed,the limitations in the current design interface are described,and corresponding solutions and suggestions are proposed.
作者
刘喆丰
田春香
李粮余
黎旭
LIU Zhefeng;TIAN Chunxiang;LI Liangyu;LI Xu(China Railway Eryuan Engineering Group Co.,Ltd.,Chengdu 610031,China)
出处
《高速铁路技术》
2020年第5期82-86,共5页
High Speed Railway Technology
关键词
软岩大变形
接口设计
沉降评估
large deformation of soft rock
interface design
settlement assessment
作者简介
刘喆丰(1986-),男,高级工程师。
