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ID:36636663
大小:2.05 MB
页数:72页
时间:2019-05-13
《玉蒙铁路曲江大桥地震地质环境评价与桥址比选研究》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、西南交通大学硕士学位论文玉蒙铁路曲江大桥地震地质环境评价与桥址比选研究姓名:李东申请学位级别:硕士专业:地质工程指导教师:谢强;蒋良文20071101西南交通大学硕叁研究生学位论文第1I页·____·-___■o_____________’___________‘________________________________-·___·_____o‘·_____________________’_____________●■_______________■■__■ooo—AbstractBasedonsiteseletionofQujiangbridgeinyu-mengrailwa
2、yundercomplexseismsgeologicalconditions,themethodsofsitugeologicalsurvey,seismicriskanalysis,technicaleconomyanalysisareused.TheregionalengineeringgeologicalconditionandseismsgeologicalenivernmentofQujiangbridgearestudied,whichisthebasisofsiteseletionofQujiangbridge.Themainresearchresultsareasfo
3、llows.(1)Theseproblemsarestudiedindetail,whicharethenear-fieldregionsgeologicalenvironment,thenewtectonicmovementsandearthquakes,activefault,earthquakeriskofgeologicaldisasters,andotherinternalandexternaldynamicroleoftheregionalgeologicalfeaturesandgeologicalengineeringproblems:thebetterbridgesi
4、teisselectedbythegeologicaltechnich:asetofoperationaltechniqueofrailwaylineselectionissummariedincomplexgeologicalconditions.(2)TheregionalseismicengineeringgeologicalcharacteristicsoftheQujiangCanyonregionalaredetailedsummariedfromseismicgeologicalstructure,thenear—fieldzoneofseismicgeologicale
5、nvironment:thebasicreferenceisprovidedforthesiteselectionofQujiangBridge(3)Theseismicriskandseismicgeologicaldisastersconditionsofthe5thbridgesiteareevaluatedbyseismicactivityanalysis,seismicriskanalysisandothertechnicaImeans.(4)Themethodofshearwavevelocitytestandthegroundsoilseismicresponseanal
6、ysisareadoptedtodeterminetheQujiangbridgeseismicdesignparametersandseismiccountermeasures.Keywords:seismicriskanalysis:geologicalalignment;QujiangBridge:YuMengRailway·西南交通大学硕士研究生学位论文第1页第1章绪论1.1问题的提出玉蒙铁路区域上地处川滇菱形断块的东南端,地质构造复杂,新构造运动强烈,是我国大陆现今地壳构造运动最为强烈的地区,以活动断裂规模大,分和密集,地震活动频繁,震级大,地震破裂带长,位错量大为主要特征。
7、曲江峡谷为线路必经之处,线路无法绕避。该区地处Ⅷ度地震区;峡谷I)(j#坡陡峻,地质条件极其复杂,两岸滑坡、岩堆、危岩落石、错落等不良地质极)£发育,桥位选址异常困难。Ub江大桥是玉蒙铁路的一座重点桥渡,该桥跨越曲江峡谷,桥高约lOOm。桥化处r地震活动频繁带,根据2003年7月中幽地震局地壳应力研究所编:驯的《云卣凼际铁路通道昆河线玉溪南至蒙自北段工程场地地震安全性评价报告》及《中国地震动参数区划图》,桥址地震动峰值加速度为O.209,地震动
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