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时间:2020-03-14
《隧道浅埋段施工过程监测技术.pdf》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、第31卷第1期岩土工程技术VoL31No.l2017年2月GeotechnicalEngineeringTechniueFeb,2017q文章编号00-7-00-0:172993(201)01266隧道浅埋段施工过程监测技术张福龙1王丰仓1张小强2(1.陕西铁路工程职业技术学院,陕西渭南714000;2.重庆大学土木工程学院,重庆400044)【摘要】隧道浅埋段施工过程中围岩变形复杂,选取隧道拱顶竖向位移为研究对象,分析隧道浅埋段围岩竖向位移的监测方法,在阿拉坦隧道进行了实地监测,并建立有限元数值计算模型,
2、分析隧道浅埋段围岩变形规律。结果表明0.6:在倍?7洞径范围内开挖对拱顶围岩竖向位移影响较大,61%67%与.达到总位移的;5m范围内竖向位移比较,距离隧道中心12倍洞径处竖向位移几乎为零,道中心线越远扰动强度越弱围岩松动圈已延伸至地表,离隧。数值计算得出岩层及地表变化规律与现场实测基本一致。【关键词】监控量测拟全位移;数值模;;损失位移【中图分类号】U45【文献标识码】Ado0n-0i1.3969/.iss.10072993.2017.1.007:jTheMonitorinTechnoloofShal
3、lowBuriedTunnelConstructionggy12Zh1ZangFulongWangFengcanghangXiaoqiangCl.ShaanxiRailwayInstitute,Weinan714000,Shaanxi,China?2.SchoolofCivilEngineering,ChongqingUniversity,Chongqing400044,China)tthdfrtfsrrrfshanstrun?AbsracTeeomallbrdtunneltc
4、lthevertcaslace【】ionououndingockoowuiecocioisompex,ildipmentofthetunnevauseecedaseresearchecanamrmeercan?lltisltthobttolzetheonitointhodofvtildislacemetofsurroundjygpnkofurtuesecttemonronducedinandmenigrocshallowbiednnlion?hfielditoingisct
5、Alatantunnel,thefiniteeletnumericalmodelisestablishedandthehallowburidtunnelsurundinrdefrmatililzed.Thereslthowthathn,serogockoonawsanausstwiiythescopeof0.6timestheholediameterexcavationhadagreaterinfluenceontheverticaldisplacementofv
6、aultsurrounding-rocktsusacemenomaredwtterment?,iipto61J^67%oftotaldipltCith75mwihinhescopeofthevticaldislace,thti;ppevercaldislacementisalstzeroatthedistancesfrom1.2tithecenterofthetunnelholediameterthesurrpmomes,oundingrockloose
7、circleextendstothesurface,thefartherfromthecenterlineofthetunnel,thelessdisturbanceintensity.Thestrataandsurfacevariationlawofnumericalcalculationarebasiclyconsistentwiththefieldmeasured.【Keywords】monitorinandmeasurementnumericalsimulationfull
8、dislacement;lossofdislacement
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