超大断面暗挖车站拱盖法稳定性影响因素的敏感性分析
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- 英文论文题名：Sensitivity Analysis of Influencing Factors on Stability of Arch Cover Method for Ultra-large Section Metro Station
- 论文作者：宁锐 ; 宋上明 ; 邓昆 ; 王明年 ; 童建军
- 英文论文作者：NING Rui ; SONG Shangming ; DENG Kun ; WANG Mingnian ; TONG Jianjun ; Chongqing Metro Construction Headquarters ; China Railway Group Limited ; School of Civil Engineering ; Southwest Jiaotong University ; Key Laboratory of Transportation Tunnel Engineering ; Ministry of Education ; Southwest Jiaotong University
- 年：2016
- 作者机构：中铁重庆地铁建设指挥部;西南交通大学土木工程学院;西南交通大学交通隧道工程教育部重点实验室;
- 论文关键词：隧道工程 ; 敏感性分析 ; 拱盖法 ; 超大断面 ; 影响因素
- 英文论文关键词：Tunnel engineering ; Sensitivity analysis ; Arch-cover method ; Ultra-large section ; Influencing factor
- 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：U231.3
- 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：3325k
- 原文格式：O
- 会议级别：全国
摘要
针对超大断面车站拱盖法破坏特征和力学机理,基于地层—结构模型及有限元分析手段,以重庆地铁5号线凤西路站层状岩地层超大断面暗挖地铁车站为研究对象,主要考虑围岩级别、隧道埋深、隧道跨度及初期支护厚度4个影响因素,并根据实际工程进行参数取值,考查其初期支护拱顶沉降及拱顶截面内力指标,并进行影响因素的敏感性分析。结果表明,4个影响因素中,隧道跨度对拱盖法的稳定性影响较低,4个考查指标中,拱顶轴力及拱顶沉降受各因素的影响较小;对拱顶弯矩而言,埋深的敏感度最大,影响最显著,其次为初支厚度、隧道跨度及围岩级别;对拱顶轴力而言,围岩级别的敏感度最大,其次为隧道跨度、隧道埋深和初支厚度;拱顶沉降各影响因素的敏感度相差不大,最大敏感度为5.3;安全系数方面,各因素的敏感性随围岩级别、隧道埋深、初期支护及隧道跨度而依次减小。
For failure characteristics and mechanical mechanism of large section station by arch cover method,based on the stratum-structure model and finite element analysis method,and taking the Feng Xilu super large section station of Chongqing Metro Line No.5 in layered rock stratum as the research object,four influencing factors as the classification of surrounding rock,tunnel depth,tunnel span and initial support thickness are mainly considered,and according to the actual engineering of parameters,the vault settlement and crown section internal force index are examined,the sensitivity analysis of the influencing factors are conducted.The results show that among the four factors,the influence of the tunnel span is low,among the 4 test indexes,the vault axial force and arch crown settlement are subjected to little influence induced by influencing factors;as for the crown bending moment,the influence sensitivity of buried depth is the largest,most significantly,followed by support thickness,the tunnel span and surrounding rock classification;as for the vault axial force,influence sensitivity of the rock classification is the largest,followed by the span of tunnel,tunnel buried depth and support thickness;as for the vault settlement,the sensitivity difference of various influencing factors is little,the maximum sensitivity is 5.3;as for the safety coefficient,the order of the sensitivity level of the influence factors is surrounding rock,tunnel buried depth,initial support and tunnel span.
For failure characteristics and mechanical mechanism of large section station by arch cover method,based on the stratum-structure model and finite element analysis method,and taking the Feng Xilu super large section station of Chongqing Metro Line No.5 in layered rock stratum as the research object,four influencing factors as the classification of surrounding rock,tunnel depth,tunnel span and initial support thickness are mainly considered,and according to the actual engineering of parameters,the vault settlement and crown section internal force index are examined,the sensitivity analysis of the influencing factors are conducted.The results show that among the four factors,the influence of the tunnel span is low,among the 4 test indexes,the vault axial force and arch crown settlement are subjected to little influence induced by influencing factors;as for the crown bending moment,the influence sensitivity of buried depth is the largest,most significantly,followed by support thickness,the tunnel span and surrounding rock classification;as for the vault axial force,influence sensitivity of the rock classification is the largest,followed by the span of tunnel,tunnel buried depth and support thickness;as for the vault settlement,the sensitivity difference of various influencing factors is little,the maximum sensitivity is 5.3;as for the safety coefficient,the order of the sensitivity level of the influence factors is surrounding rock,tunnel buried depth,initial support and tunnel span.
引文
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[8]宋克志,李福献,朱雷敏,王梦恕.隧道二衬结构受力影响因素的敏感性分析[J].公路交通科技,2014,(2):86-91.SONG Kezhi,LI Fuxian,ZHU Leimin,WANG Mengshu.Analysis on Sensitivity of Influencing Factors of Tunnel Secondary Lining Structure Stress[J].Highway Traffic Science and Technology,2014,(2):86-91.
[2]吴学锋.土岩复合地层拱盖法施工三维有限元数值模拟[J].城市轨道交通研究,2012,15(8):135-138.WU Xuefeng.Three dimensional finite element numerical simulation of the construction of the soil and rock strata arch cover method[f].urban rail transit research,2012,15(8):135-138.
[3]李磊.深埋大断面隧道有限元二维应力分析[J].科技信息,2012,33:357-358.LI Lei.Two dimensional stress analysis of deep buried large section tunnel[f].Science and Technology Information,2012,33:357-358.
[4]华福才,雷刚,郑广亮.硬岩地区大跨度矿山法地铁隧道的沉降分析研究[A].中国土木工程学会、中国土木工程学会隧道及地下工程分会.中国土木工程学会第十五届年会暨隧道及地下工程分会第十七届年会论文集[C].中国土木工程学会、中国土木工程学会隧道及地下工程分会,2012.7.HUA Fucai,LEI Ggang,ZHENG Guangliang.Hard rock area of large span metro tunnels constructed by mining method of settlement analysis[J].China Civil Engineering Society,China Civil Engineering Society of tunnel and underground engineering branch.China civil engineering society the 15th Annual Conference of tunnel and underground engineering branch of the seventh year will proceedings[C].China Civil Engineering Society,China Civil Engineering Society of tunnel and underground engineering branch,2012.7.
[5]侯哲生,李晓,王思敬,等.金川二矿某巷道围岩力学参数对变形的敏感性分析[J].岩石力学与工程学报,2005,24(3):406-410.HOU Zhesheng,LI Xiao,WANG Sijing,et al.Sensitivity analysis of mechanical parameters todeformation of surrounding rocks for a tunnel in Jinchuandeposit II[J].Chinese Journal of Rock Mechanics andEngineering,2005,24(3):406-410.
[6]李鹏飞,张顶立,赵勇,等.大断面黄土隧道二次衬砌受力特性研究[J].岩石力学与工程学报,2010,29(8):1690-1696.LI Pengfei,ZHANG Dingli,ZHAO Yong,et al.Study of Mechanical Characteristics of Secondary Lining of Large-section Loess Tunnel[J].Chinese Journal of Rock Mechanics and Engineering,2010,29(8):1690-1696.
[7]宋克志,王梦恕.围岩弹性抗力对隧道结构受力的影响分析[J].水文地质工程地质,2013,40(1):79-82.SONG Kezhi,WANG Mengshu.Influence of Elastic Resistance of Wall Rock on Tunnel Lining Internal Forces[J].Hydrageology and Engineering Geology,2013,40(1):79-82.
[8]宋克志,李福献,朱雷敏,王梦恕.隧道二衬结构受力影响因素的敏感性分析[J].公路交通科技,2014,(2):86-91.SONG Kezhi,LI Fuxian,ZHU Leimin,WANG Mengshu.Analysis on Sensitivity of Influencing Factors of Tunnel Secondary Lining Structure Stress[J].Highway Traffic Science and Technology,2014,(2):86-91.