西成铁路某段滑坡群特征分析及选线对策.pdf

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1、2013年8月铁道工程学报Aug2013第8期(总179)JOURNALOFRAILWAYENGINEERINGSOCIETYNO．8(Ser．179)文章编号：1006—2106(2013)08—0027—04西成铁路某段滑坡群特征分析及选线对策白连福料陈建发宋章(中铁二院工程集团有限责任公司，成都610031)摘要：研究目的：滑坡是西南山区一种比较普遍的地质灾害，一旦发生，对人类生命及财产安全将造成严重威胁。西成铁路宝轮至石羊坝段的清江河左岸滑坡极为发育，该区滑坡常以大、巨型为主，且滑坡特征明显，规律性强。本文通过对该区1O个滑坡特征进行比对分析，得出该区滑坡的发育规律，以为该

2、区地质选线提供依据。研究结论：(1)该区滑坡一般规模较大，各滑坡要素明显，滑坡后壁较长，周界多受节理组合切割控制；(2)滑体的外形跟主滑与顺层岩体倾向的夹角有关系；(3)该区铁路地质选线应综合前后工程设置情况考虑，采取“先绕避后治理”的方向原则，优先将线路选到清江河的右岸，避开顺向坡区，若无法避开则应在左岸按投资从小到大顺序选择最佳方案；(4)该研究成果可应用于顺向坡区的方案选择，以避免方案的后期反复带来经济浪费和工程风险。关键词：工程地质；顺层滑坡；平面形态；选线对策中图分类号：P625．1文献标识码：ACharacteristicAnalysisofLandslidesinaS

3、ectionofXi'an——ChengduRailwayandRailwayAlignmentStrategyBAILian—fu，CHENJian—fa，SONGZhang(ChinaRailwayEryuanEngineeringGroupCo．Ltd，Chengdu，Sichuan610031，China)Abstract：Researchpurposes：Landslideisacommongeologicdisaster，butitusuallycausesthethreattopeople~lifeandproperties．IntheBaolun—Shiyangba

4、sectionoftheXihn—ChengduRailway，thelandslidesverydevelopintheleftbankoftheQin~iangRiver．Theyaremainlybigorhuge，withtheobviouslandslidecharacteristicsandregularities．Inordertofindoutthedevelopmentregularitiesofthelandslidesandprovidethebasisforthegeologicalignmentoftherailwayinthissection，thesy

5、stematicanalysisiscarriedoutforthecharacteristicsofthetenlandslidesinthissection．Researchconclusions：(1)Thelandslidesareusuallyoflargescaleswiththeobviouslandslidecharacteristicsandclearlandslideelements．Thelandslidebackwallareusuallylongandthesurroundingboundariesareregulatedbythecombinedcutt

6、ingjoints．(2)Thelandslideshapeisrelatedtotheincludedanglebetweenslidingdirectionandbeddingrocktendency．(3)ThegeologicalalignmentoftherailwayinthissectionshouldcomprehensiVelyconsidertheengineeringsituationsinthesection，andtheprincipleofthe”passingroundfirstandthenengineeringtreatment”shouldbef

7、ollowed．SotherailwayshouldbepreferentiallybuiltintherightbankoftheQingjiangRivertokeeptherailwayawayfromtheconsequentslope．Iftherailwayhastobebuiltintheleftbandoftheriver，thebestschemewiththeleastinvestmentshouldbeadopted．(4)Theresearch