水平量测（双语）

土木工程检测技术专业教学资源库水平量测TrackLevelSurveyLearningResourcesforSurveyingTechnologyforCivilEngineeringMajors1.TrackLevelSurvey水平量测2.CaseEvaluation评价TrackLevelSurvey水平测量2002年，郑州开往乌鲁木齐的T197次列车运行至陇海线李家坪站9号道岔处，列车出现脱轨，造成重大事故。问题：请同学们讨论哪些原因可能引起列车脱轨?Lead-in导入：In2002,whenthetrainT197,fromZhengzhoutoUrumqi,rantotheNo.9turnoutofLijiapingStationontheLonghaiLine,thetrainderailed,causingasevereaccident.Q：Whatmaycausethetraintoderail?TrackLevelSurvey水平测量1.TrackLevelSurvey水平量测LevelDeviationTORlevelinglineforleftsiderailTORlevelinglineforrightsiderailRailSleeperRubberpad《铁路线路修理规则》规定：两股钢轨顶面水平的容许偏差，正线及到发线不得大于4mm，其它站线不得大于5mm.The“Railwayrepairrules”stipulatesasfollows:theallowabledeviationofthehorizontallevelofthetopofrail(TOR)onbothsides,forthemainlinetrackandthearrival-departuretrack,shouldnotbegreaterthan4mm,andfortheotherstationlines,shouldnotbegreaterthan5mm.TrackLevelSurvey水平测量结合轨距检查，每6.25m检查1处。日常对三角坑的检查，是在检查水平时按前后两检查点（每6.25m检查1处）的水平相对差来表示三角坑的大小，连续两处水平误差符合相同或有1处为零时不需要计算三角坑，只有在连续两处水平误差为一正一负时才需要计算三角坑。Combinedwiththegaugeinspection,thecheckingforrailtwistsshouldbeconductedevery6.25m.Indailyinspection,thesizeofarailtwistdependsontherelativedifferencebetweentwoconsecutivecheckpoints(i.e.everyother6.25m).Itisunnecessarytoworkonthesizeofrailtwistifthehorizontalleveldifferenceisthesame,orthevalueis0inonepointbetweentwoconsecutivecheckpoints.Thesizeofrailtwistsshouldbecalculatedonlywhenoneofthehorizontalleveldifferenceispositive(+),andanotheroneisnegative(-)intwoconsecutivecheckpoints.TrackLevelSurvey水平测量1.TrackLevelSurvey水平量测工程案例：列车运行至直线有砟轨道路段，速度为150km/h，以6.25m为基长，对该路段进行静态水平量测，连续检查五处水平差值分别为：X1=1mm、X2=3mm、X3=-1mm、X4=-3mm、X5=5mm，结合规范评价水平值是否超限?2.CaseEvaluation评价Whenthetrainrunsonastraightballasttracksectionwithaspeedof150km/h,taking6.25masthebaselengthtocarryoutthestaticgaugemeasurementonthistracksection,fivegroupsofhorizontalleveldifferencevaluewereobtainedin5consecutivechecking,whichareX1=1mm,X2=3mm,X3=-1mm,X4=-3mm,andX5=5mm.Pleasecheckonthecode,andevaluatewhethertheabovevaluesexceedthelimitsornot.TrackLevelSurvey水平测量直线有砟轨道静态平顺度标准（mm）Speed速度Height高低TrackAlignment轨向HorizontalLevel水平TrackGauge轨距160km/h≥v＞120km/h444+4

-2120km/h≥v及到发线(Arrival-DepartureLine)444+6

-22.CaseEvaluation评价Standardforstaticsmoothnessofstraightballasttrack(mm)TrackLevelSurvey水平测量TrackLevelSurvey水平测量1.TrackLevelSurvey水平量测2.Case