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时间:2020-06-19
《新建红柳至一里坪铁路工程地质特征及选线研究.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2081期4年(总81月91)铁道工程学报Aug2014JOURNALOFRAILWAYENGINEERINGSOCIETYNO.8(Ser.191)文章编号:1006—2106(2014)08—0006—05新建红柳至一里坪铁路工程地质特征及选线研究岳志勤钟良丁浩江王哲威(中铁二院工程集团有限责任公司,成都610031)摘要:研究目的:新建红柳至一里坪铁路位于敦煌至格尔木铁路红柳站与柴达木盆地腹地一里坪之间,沿途经过盐沼盆地、早期湖积盆地、雅丹地貌三个地质地貌单元,交错分布有风沙、岩溶、地震、崩塌、软土、盐渍土、盐岩及盐渍岩、季节性冻土等地质现象,生态环境脆弱,水文环境、地质环
2、境复杂多变。地质工作需查明控制线路方案的地质因素,综合分析其危害,预测其对工程可能产生的不利影响,为线路选择及工程设置提供依据。研究结论:(1)柴达木湖积盆地以盐为本,以水、风为介质,盐的搬运、沉积在相对封闭的盆地内循环不止;(2)祁连山、昆仑山坡麓一带的盐沼湖,水补给充足,湖内软土、季节性冻土、岩溶发育,难以治理,线路采用了绕避方案;(3)雅丹地区,地表多被“盐被”覆盖,部分沙漠化,采用桥方案短距离通过风沙地带;(4)早期干湖积盆地内地质条件相对较好,线路长段通过;(5)工程建设应以盐治沙,保护“盐被”,保持水环境的稳定;(6)本研究可为相似地质特征的选线及工程设计提供一定的参考
3、价值。关键词:柴达木盆地;沙漠;软土;盐湖;盐岩;盐渍土中图分类号:u212.22文献标识码:AStudyontheLineSelectionandRailwayEngineeringGeologyCharacteristicsofHongliu——YilipingRailwayYUEZhi—qin,ZHONGLiang,DINGHao—Jiang,WANGZhe—Wei(ChinaRailwayEryuanEngineeringGroupCo.Ltd,Chengdu,Sichuan610031,China)Abstract:Researchpurposes:Thenewrailw
4、ayofHongliu—YilipingisinbetweentheHongliustationofDunhuang—GolmudRailwayandYilipingintheQaidamBasin,passingcrossthreegeologicallandformunits:saltmarshbasin,earlylakesedimentarybasinandYadanglandform,distributedwiththegeologicalphenomenonsuchassandstorm,karst,earthquake,collapse,softclay,saline
5、soil,saltrock,seasonallyfrozensoil,etc.Theecologicalenvironmentisweak,thehydrologicalenvironmentandgeologicalenvironmentarecomplicated.Thegeologicalfactorswhichcontroltherouteplanshouldbeclearlyinvestigated,thehazardshouldbecomprehensivelyanalyzed,theadverseeffectstotherailwayshouldbepredicted
6、,thebasisfortheroutechoiceandprojectsettingsshouldbeprovided.Researchconclusions:(1)IntheQaidamlakedepositedbasin,thesaltiscontinuouslycarriedanddepositedinthisrelativelyclosedbasin,windandwaterasthemedium.(2)ThesaltlakelocatedinthefootslopeoftheQilianMountainsandtheKunlunMountainsisamplysuppl
7、iedwithwater,thesoftclay,seasonallyfrozensoilandkarstarewidelydistributedanddificulttobedisposed,therouteischosetopassaround.(3)IntheregionofYadanglandform,thelandiscoveredbythe’’saltbed”,somepartisdesertificated,thebridge—planischosent
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