包西铁路洞子崖隧道断层破碎带浅埋偏压段施工数值模拟分析  

Simulation Analysis on the Construction of the Unevenly Pressured Shallow Section in Fault Fracture Zone of Dongziya Tunnel on Baotou-Xi'an Railway

作　　者：林裕 

机构地区：[1]中铁隧道勘测设计院有限公司厦门分公司,福建厦门361003

出　　处：《铁道标准设计》2011年第10期99-102,共4页Railway Standard Design

摘　　要：洞子崖隧道DK683+938～DK684+004段为断层破碎带浅埋偏压大断面隧道。通过Flac5.0数值软件对三台阶预留核心土法、CRD法和双侧壁导坑法等工法进行数值模拟比较,得出双侧壁导坑法先开挖浅埋侧导坑能够有效控制隧道洞内周边位移,保证了工程质量和施工安全。Section DK683＋938 - DK684＋004 of Dongziya tunnel belongs to shallow uneven pressured tunnel with large section and passes through fault fracture zone. The project adopted common excavation methods including triple-bench with reserved core method, CRD method and two side heading method. In this paper, the numerical simulation results of three excavation methods were compared by using Flac 5.0 software, and it has been concluded that two side headings excavation with the shallow side heading excavated first could effectively control tunnel periphery displacements, which ensured engineering quality and construction safety.

关 键 词：铁路隧道 断层破碎带 浅埋偏压隧道 施工 数值模拟 

分 类 号：U452.27[建筑科学—桥梁与隧道工程]