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时间:2019-05-22
《浅埋大跨度隧道施工方法的比选与应用》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、第36卷,第5期公路工程Vo1.36,No.52011年10月HighwayEngineeringOct.,2011浅埋大跨度隧道施工方法的比选与应用黄龙湘。,杨元洪,贺威,阳军生(1.中南大学土木建筑学院,湖南长沙410075;2.湖南省长湘高速公路建设开发有限公司,湖南长沙410075)[摘要】结合京珠复线长湘高速公路三车道隧道工程,采用数值模拟对双侧壁导坑法、三台阶法施工隧道围岩和支护系统变形及受力特点进行对比分析,并结合现场施工应用情况,对比分析两种工法的优缺点。研究结果表明,双侧壁导坑法施工在控制围岩变形及地面沉降方面优于三台阶法,且产生的围岩塑性区较小,但两种工法施工
2、均能满足围岩及支护稳定性的要求;三台阶法在施工进度、资源利用、造价、工序转化及施工难度方面具有优势,长沙地区浅埋大跨度隧道采用三台阶法施工,可以保证施工的安全、快速、高效。[关键词]浅埋大跨度隧道;施工方法;双侧壁导坑法;三台阶法[中图分类号】U455.4[文献标识码】A[文章编号】1674—0610(2011)05—0025—08ComparativeAnalysisandApplicationofTheConstructionMethodinShallowLargeSpanTunnelHUANGLongxiang,YANGYuanhong,HEWei,YANGJunsheng
3、(1.CollegeofCivilEngineeringandArchitecture,CentralSouthUniversity,Changsha,Hunan410075,China;2.HunanChangxiangExpresswayConstructionandDevelopmentCo.,Ltd.Changsha,Hunan410075,China)[Abstract]Thethesistakesathree.1anetunnelconstructionofadoubletrackfromBeijing-ZhuhaiExpressway,theChangsha—Xia
4、ngtanhighwayasanexample.Itcarryoutcomparativeanalysisofdeform—ationandstresssituationinthetunnelsurroundingrocksandthesupportsystemthroughnumericalmod-clingofdoublesidedriftmethodandthreebenchmethod,andcomparestheadvantagesanddisadvanta-gesbetweenthetwoconstructionmethodswithaconsiderationoft
5、herealapplicationontheconstructionsite.Thestudyshowsthat,doublesidedriftmethodisbetterthanthreebenchmethodinthewayofcon—trollingsurroundingrocksdeformationandgroundsubsidence,andproduceslesssuroundingrockmassplasticzone,whilebothtwomethodscanmeettherequirementsofstabilityofsurroundingrockands
6、up-portstability.Thethreebenchmethodismoreadvantageousinconstructionschedule,resourceutiliza-tion,cost,processtransformationandtheconstructiondificulty.Therefore,asfarastheprojectiscon-cerned,thethreebenchmethodshouldbeadoptedintheshallowlargespantunnelconstructioninthecityofChangsha,whichcan
7、ensurethesafety,speedandefficiencyoftheconstruction.Theresearchre—suitsprovideafurtherexplorationaboutreasonableconstructionmethodintheshallowlargespantunnelconstructions,andoffersusefulreferencesforthedesignandmonitoringofthetunnelengineerin
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