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时间:2019-06-28
《乌鞘岭隧道F4断层区段监控量测综合分析解析》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、维普资讯http://www.cqvip.com第25卷第7期岩石力学与工程学报、b1.25No.72O06年7月ChineseJournalofRockMechanicsandEngineeringJu/y,2006乌鞘岭隧道F4断层区段监控量测综合分析刘志春,李文江,孙明磊,朱永全(石家庄铁道学院土木工程分院,河北石家庄050043)摘要:乌鞘岭隧道是兰新线重点控制工程,是国内最长的单线铁路隧道。该隧道穿越4条区域性大断层,地质及地应力条件十分复杂,围岩软弱破碎,变形大。针对复杂应力条件下的软岩大变形隧道特点,在F4断层区段施工过程中,严格进行系统、全面、
2、长期的监控量测指导设计施工,以实测的拱顶下沉、水平收敛、锚杆轴力、初期支护围岩压力、初期支护钢架应力、初期支护混凝土应力、二次衬砌接触压力、二次衬砌混凝土应力数据为依托,进行实测数据与施工工序的关系、围岩压力与位移的关系、量测项目稳定值的预测、多量测项目发展趋势相互关系规律、位移的纵向分布规律、荷载侧压力系数、二次衬砌分担围岩压力比例、二次衬砌施作时机等多项综合分析,及时将处理信息反馈给施工,对开挖后的结构稳定性作出分析判断及采取相应措施。实践证明效果可靠,围岩稳定,结构完好,为保证该区段顺利贯通提供可靠的技术保证。关键词:隧道工程;乌鞘岭隧道;监控量测;围岩
3、压力:位移;结构稳定性;综合分析’中圈分类号:u45文献标识码:A文章缩号i1000—6915(2006)07—1502—10MONITORINGANDCOMPREHENSIVEANALYSISINF4SECTIONOFWUQIAOLINGTUNNEL’LIUZhichun,LIWenjiang,SUNMinglei,ZHUYongquan(SchoolofCivilEngineering,ShijiazhuangRailwayInstitute,Shifiazhuang,Hebei050043,China)Abstract:Wuqiaolingtunnel,
4、thelongestsingle—trackrailwaytunnelinChina,isthekeyprojectofLanzhou—UrumchiRailway.Itgoesthroughfourregionalfaults,anditsgeologicalandgeostressconditionsarecomplicated.Accordingtothecharacteristicsofsoftrockandlargedeformationunderthecomplicatedstresscondition,thecomprehensivemonito
5、ringisexecutedduringtheconstructioninF4section.Basedonthemeasuredresultsofthevaultsettlement,thehorizontalconvergency,theaxialforceofrockbolt,thesurroundingrockpressure,thesteellinerplatestress,theconcretestressofpreliminarysupport,thestressandpressureofthesecondarylining,thesynthet
6、icalfactorsoftherelationbetweenmeasurementandconstructionprocedure,therelationbetweensuroundingrockpressureanddisplacement,theforecastofmeasurement,thedevelopmentalruleofmulti.measurementitems,thelongitudinaldistributionruleofdisplacement,thecoeficientoflateralpressure,thesharedrati
7、oofsecondarylining,thetimeofsecondaryliningconstruction,etc.areanalysed.Andtheinformationisfedbacktotheconstmctionintime.Thestructurestabilityisanalysedandthecorrespondingmeasuresareadopted,whichCanprovidereferencesfordatasimulationandtheoreticalanalysis.Thepracticeprovesthattheefec
8、tisreliable,thesurr
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