大断面黄土隧道进洞浅埋段施工方案比选分析
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- 英文论文题名：Selection of Construction Proposal for Portal Section of Shallow-Buried Large Section Loess Tunnel
- 论文作者：丁春林 ; 赵灵吟 ; 窦世学 ; 吴超
- 英文论文作者：DING Chunlin ; ZHAO Lingyin ; DOU Shixue ; WU Chao ; Education Ministry Key Lab of Road and Traffic Engineering ; Tongji University ; The Fifth Engineering CO. ; Ltd of China Railway Twenty-Five Bureau Group
- 年：2016
- 作者机构：同济大学道路与交通工程教育部重点实验室;中铁二十五局集团第五工程有限公司;
- 论文关键词：大断面黄土隧道 ; 工法比选 ; 双侧壁导坑法 ; CRD工法 ; 短台阶七步开挖法 ; 数值模拟
- 英文论文关键词：Large section loess tunnel ; Comparison of construction method ; Double side-drift method ; CRD method ; Short-bench seven-step excavation method ; Numerical simulation
- 会议召开时间：2016-10-24
- 会议录名称：2016中国隧道与地下工程大会（CTUC）暨中国土木工程学会隧道及地下工程分会第十九届年会论文集
- 语种：中文
- 分类号：U455.4
- 学会代码：OGTY
- 会议名称：2016中国隧道与地下工程大会（CTUC）暨中国土木工程学会隧道及地下工程分会第十九届年会
- 会议地点：中国四川成都
- 主办单位：中国土木工程学会隧道及地下工程分会
- 学会名称：中国土木工程学会
- 页数：7
- 文件大小：2209k
- 原文格式：O
- 会议级别：全国
摘要
大西客专某大断面黄土隧道进洞段埋深浅、围岩稳定性差,开挖施工方法不当易发生洞室塌方、大变形、或地表塌陷等失稳现象,因此选择合理的施工工法很重要。为控制隧道开挖过程中围岩的受力与变形,采用三维弹塑性有限元法,模拟分析了大断面黄土隧道采用双侧壁导坑法、CRD工法和短台阶七步开挖法施工时隧道变形和受力特点,对比分析了不同开挖工法的优缺点,为隧道施工工法比选提供了依据。研究结果表明:大断面黄土隧道进洞浅埋段可选择短台阶七步开挖法施工,该工法施工经济,并可控制隧道受力变形,保证隧道施工安全。
One loess tunnel in Daxi railway is of large section,its portal section is shallow-buried and the stability of the surrounding rock is poor.Cavern collapse,large deformation,surface subsidence and other phenomena of instability are easily to occur if excavation construction methods are inappropriate,therefore,to select appropriate construction methods is important.In order to control the force and deformation of surrounding rock during excavation,3D elastoplastic finite element method was selected,the stress and deformation characteristics of large section loess tunnel excavation when applying double side-drift,CRD and short-bench seven-step excavation were simulated and analyzed,the advantages and disadvantages of each construction method were compared,providing a basis for comparison and selection of construction method.The results show that:it is feasible to choose the short-bench seven-step excavation method for portal section of shallow-buried large section loess tunnel,it is economical and can control the force and deformation of tunnel,ensuring the safety of tunnel construction.
One loess tunnel in Daxi railway is of large section,its portal section is shallow-buried and the stability of the surrounding rock is poor.Cavern collapse,large deformation,surface subsidence and other phenomena of instability are easily to occur if excavation construction methods are inappropriate,therefore,to select appropriate construction methods is important.In order to control the force and deformation of surrounding rock during excavation,3D elastoplastic finite element method was selected,the stress and deformation characteristics of large section loess tunnel excavation when applying double side-drift,CRD and short-bench seven-step excavation were simulated and analyzed,the advantages and disadvantages of each construction method were compared,providing a basis for comparison and selection of construction method.The results show that:it is feasible to choose the short-bench seven-step excavation method for portal section of shallow-buried large section loess tunnel,it is economical and can control the force and deformation of tunnel,ensuring the safety of tunnel construction.
引文
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[6]朱义嘉.黄土隧道洞口浅埋段开挖支护技术探讨[J].西部交通科技,2015,(3):53-56,66.ZHU Yijia.Discussion on Excavation Supporting Technology of shallow tunnel in Loess Tunnel[J].Western Traffic Science and Technology,2015,(3):53-56,66.
[7]丁春林,王君,王高彦,等.浅埋大断面公路隧道开挖施工工法比选[J].现代隧道技术,2014,51(S1):269-274.DING Chunlin,WANG Jun,WANG Gaoyan,et al.Comparison of Excavation Methods for the Shallow-Buried Highway Tunnel with a Large Section[J].Modern Tunnelling Technology,2014,51(S1):269-274.
[8]王武规.客运专线大断面浅埋黄土隧道进洞施工技术[J].铁道标准设计,2007,(8):43-45.WANG Wugui.Railway Tunnel Construction Technology of Shallow-Buried Large section Loess Tunnel[J].Railway Standard Design,2007,(8):43-45.
[2]郭健,王起才,唐述林,等.浅埋暗挖黄土隧道施工过程数值模拟分析[J].铁道建筑,2010,(8):81-83.GUO Jian,WANG Qicai,TANG Shulin,et al.Numerical Simulation Analysis of Construction Process of Shallow-Buried Loess Tunnel[J].Railway Engineering,2010,(8):81-83.
[3]欧阳院平,王明年.某大断面黄土隧道施工方法的三维数值模拟[J].四川建筑,2006,26(6):91-94.OUYANG Yuanping,WANG Mingnian.Three Dimensional Numerical Simulation of the Construction method of a Large section Loess Tunnel[J].Sichuan Architecture,2006,26(6):91-94.
[4]丁春林,王叶松,周顺华.大跨度隧道暗挖施工技术研究及其数值模拟分析[J].现代隧道技术(增刊),2002,39(10):332-337.DING Chunlin,WANG Yesong,ZHOU Shunhua.Study and Numerical Simulation Analysis of Construction Techniques for Bored Large-span Tunnels[J].Modern Tunnelling Technology(Supp.),2002,39(10):332-337.
[5]谭忠盛,孟德鑫,石新栋,等.大跨小间距黄土隧道支护体系及施工方法研究[J].中国公路学报,2015,28(11):82-89,97.TAN Zhongsheng,MENG Dexin,SHI Xindong,et al.Research on Support System and Construction Method for Large-section Small Spacing Tunnel in Loess[J].China Journal of Highway and Transport,2015,28(11):82-89,97.
[6]朱义嘉.黄土隧道洞口浅埋段开挖支护技术探讨[J].西部交通科技,2015,(3):53-56,66.ZHU Yijia.Discussion on Excavation Supporting Technology of shallow tunnel in Loess Tunnel[J].Western Traffic Science and Technology,2015,(3):53-56,66.
[7]丁春林,王君,王高彦,等.浅埋大断面公路隧道开挖施工工法比选[J].现代隧道技术,2014,51(S1):269-274.DING Chunlin,WANG Jun,WANG Gaoyan,et al.Comparison of Excavation Methods for the Shallow-Buried Highway Tunnel with a Large Section[J].Modern Tunnelling Technology,2014,51(S1):269-274.
[8]王武规.客运专线大断面浅埋黄土隧道进洞施工技术[J].铁道标准设计,2007,(8):43-45.WANG Wugui.Railway Tunnel Construction Technology of Shallow-Buried Large section Loess Tunnel[J].Railway Standard Design,2007,(8):43-45.