长输管道黄土暗穴影响分析

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1、万方数据万方数据万方数据万方数据withaborderofbackfillsoil,contactgapisthemainchannelleadstotheformationofawaterinfiltrationsinkhole.Thispaperexpoundstheformationmechanismofthedarkholesaroundthepipe.(3)Theoverburdenload,internalpressureandtemperaturedifferencestressofthepipeareanalyzed.Basedont

2、hemechanismofpipesoil,themodelofnon-fixedendsingle-spanpipelinewasestablished.AssumingpipegradeX80(type),tube2mdepth,getthelimitspanofsecurityfor37mwillbegottenthroughtheoreticalcalculation,thiscanprovidereferenceforthelatermaintenanceofthewest-eastgaspipeline.Keywords:loessdar

3、kholesaroundthepipe;causes;mechanism;forceanalysis;limitspanThesis：ApplicationResearch万方数据目录目录1绪论........................................................................................................................................11.1选题依据及研究意义................................

4、....................................................................11.2西气东输二线DL069段工程概况...............................................................................21.2.1地质概况.....................................................................................................

5、..........21.2.2处置方案概况.......................................................................................................31.3国内外研究现状............................................................................................................61.3.1黄土暗穴研究现状....................

6、...........................................................................61.3.2管道与管周黄土暗穴关系研究现状...................................................................71.4研究内容、方法与技术路线........................................................................................81.4.1研究内容.

7、..............................................................................................................81.4.2研究方法与技术路线...........................................................................................82研究区环境条件与地质条件分析..............................................

8、........................................112.1环境条件.....