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《高速铁路CPⅢ相邻区段搭接方法研究与应用-论文.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、2014年6月铁道工程学报Jun2014第6期(总189)JOURNALOFRAILWAYENGINEERINGSOCIETYNO.6(Ser.189)文章编号:1006—2106(2014)06—0030—05_.--I同P.-i速铁路cPm相邻区段搭接方法研究与应用任晓春周东卫料(中铁第一勘察设计院集团有限公司,西安710043)摘要:研究目的:cPⅢ轨道控制网相邻区段之间能否实现合理平顺搭接已成为影响控制网能否达到高精度的重要因素之一,进而影响轨道的平顺性。本文针对现行规范中直接坐标严密平差
2、搭接方法在可操作性上存在的问题,结合工程实际对CPⅢ网相邻区段搭接方法进行对比研究,意在发展一种既能满足工程实际需要又能有效提高CPIII网相邻区段之间搭接精度的新方法。研究结论:(1)余弦函数平滑搭接法在cPⅢ平面网相邻区段搭接中应用是可行的,其搭接处理后的长波平顺性和相对精度均高于直接坐标严密平差搭接法;(2)提出的“基于余弦函数平滑坐标的严密平差搭接法”更加有利于提高搭接区段轨道的短波平顺性和整体线路的长波平顺性;(3)本文研究成果满足工程测量实际需要,可应用于无砟轨道铺设阶段和运营维护阶段
3、CPIII平面网相邻区段平顺搭接处理,对相关测量规范的完善有一定参考价值。关键词:高速铁路;CPm网;余弦函数;平顺性中图分类号:U238文献标识码:AResearchandApplicationontheLappingMethodsbetweenAdjacentSectionsforCPmTrackControlNetworkforHigh—speedRailwayRENXiao—chun,ZHOUDong—wei(ChinaRailwayFirstSurveyandDesignInstitut
4、eGroupLtd,Xian,Shanxi710043,China)Abstract:Researchpurposes:Whetherthelappingeffectsbetweenadjacentsectionsalereasonableaswellassmoothornothavebeenapredominantinfluenceinachievinghigh—precisionforCPIIIcontrolnetwork,andwillafectthetrackregularityfurth
5、er.Incurrentcodethereareproblemsoverpracticalmaneuverabilityusewhileusingconstrainedadjustmenttechniqueforoverlappingpoints.ThereforeacomparativeresearchonlappingmethodsisconductedcombiningwithengineeringpracticeSOastodevelopanewlappingmethodbetweenad
6、jacentsectionsforcPmtrackcontrolnetwork.Researchconclusions:(1)ItisfeasibletousecosinefunctionsmoothingmethodforCP111lappingbetweenadjacentsections,andtheperformancesofcosinefunctionsmoothingmethodaresuperiortoconstrainedadjustmentmethodintermsoflongw
7、avesofthetrackregularityandrelativeaccuracy.(2)Theproposedmethod,whichisdesignedtoperformconstrainedadjustmentonthebasisofcosinefunctionsmoothingforthelappingpoints,wouldhelptoimprovetheperformancesofthetrackregularityoftheshortwavesaswellastherailway
8、lineregularityoftheoveralllongwaves.(3)ItisvalidatedthattheresearchresultscanmeetthepracticalrequirementsofengineeringsurveyingandcanbeappliedtoCPIIIlappingbetweenadjacentsectionsovertheballastlesstrackconstructionstageaswellasoperatingandmain
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