遂渝线无碴轨道路基施工及沉降观测技术研究.docVIP

遂渝线无碴轨道路基施工及沉降观测技术研究 2007年5月 第5期(总104) 铁道工程 JOURNALOFRAILWAYENGINEERINGSOCIETY Mav2007 NO.5(Ser.104) 文章编号:1006—2106(2007)05—0016—06 遂渝线无碴轨道路基施工及沉降观测技术研究 秦瑞谦” (中铁八局集团有限公司,成都610081) 摘要:研究目的:总结无碴轨道路基施工及其沉降观测的工艺方法和技术参数,验证软土路基桩网加固结构和 红层泥岩改良的合理性,为今后制定类似工程施工的技研究结论:经高填方桩网路基施工技术和红层泥岩配制石灰拌和料回填碾压路基施工技术做的路基,通 过了路基评估验收,满足时速200km无碴轨道的要求. 关键词:无碴轨道;路基施工;沉降观测 中图分类号:U213文献标识码:A ResearchontheTechnologiesforConstructionofBallastlessTrackSubgrade ofSuining—-ChongqingRailwayLineandItsSettlementObservation QINRui—qian (TheEighthEngineeringBureauGroupCo.Ltd.ofChinaRailway,Chengdu,Sichuan610081,China) Abstract:Researchpurposes:Thepurposesaretostimmarizethetechnicalmethodsandparametersofconstructionof ballastlesstracksubgradeanditssettlementobservationandverifythereasonabilityofpile——netreinforcementofsoft subgradeandimprovementofredrockmudstoneSOastoprovidereferencetothetechnicalstandardforsimilarworkin future.Researchmethods:Themethodofimpactrollingcompactiontoacceleratesettlementwiththefoursectorsand eightflowswasadoptedtonllthesubgrade,thewaysofK30,Ev2andEdwereadoptedtoexaminethesubgrade compactness,themethodsoflayingsettlementplateandsectionplanetubewereadoptedtotraceandobservethechange ofsubgradesettlementforlongtermandrecordthedataonsettlementvolume,andthesoftwarewascompiledtopredict theregularityofsettlementchange.Researchresults:Thedesignrequirementsofcompactnessweremetforthe subgradesinpile—netreinforcementsectionandredrockmudstoneimprovedsection.Theobservationresultsfrom settlementplateshowedthetotalpredictedsettlementvolumewaslessthan15mmandthesettlementvolumeinsix monthswaslessthan8mm,whichmettherequirementforpost—constructionsettlementvolumeof15mm.Theuneven settlementvolumeof20mwas7.89mm,whichmettherequirementof20mm/20m. Researchconclusions:Thesubgradeconstructionwasdonebytechnologiesmentionedabovepassedtheevaluationof subgradeandmettherequirementofballastlesstrackof200km/hrailway. Keywords:balastlessrailway;subgradeconstruction;settlementobservation 收稿日期:2066—09—23 作者简介:秦瑞谦,19