哈大客运专线桥梁墩台沉降观测与预测.pdf
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哈大客运专线桥梁墩台沉降观测与预测
杨吉新 朱伟伟 丁 兰
(武汉理工大学, 武汉 430063)
摘要:研究目的:以哈大客运专线运粮河特大桥墩台沉降观测为背景,介绍运粮河特大桥沉降观测的技术要求
与观测方法;采用曲线拟合法综合分析了桥梁墩台的沉降变形趋势,运用灰色系统的新陈代谢 GM(1,1)模型
建立累积沉降的预测模型,来分析桥梁墩、台的沉降量,掌握其变形规律。
研究结论:通过对哈大客运专线运量河特大桥墩台沉降观测数据进行的分析与评估,采用曲线拟合法分
析其沉降变形趋势,运用灰色系统模型对桥梁墩台进行预测,得出以下结论:桥梁墩台的沉降已经渐渐趋于稳
定,运用灰色系统的新陈代谢GM(1,1)模型建立累积沉降的预测模型,预测结果表明该模型精度较高,可以
用于累积沉降的预测。
关键词:桥梁;墩台;客运专线;沉降观测;曲线拟合;灰色系统理论;预测模型
中图分类号:U443 文献标识码:A
ObservationandPredictionofSettleofBridgePierandAbutmentofHarbin—
DalianPassengerDedicatedLine
YANG Ji—xin,ZHU Wei—wei,DING Lan
(WuhanUniversityofTechnology,Hubei,Wuhan430063,China)
Abstract:Research purpoess:Takingthe settlementobservation ofYunliangheBridgeofHarbin—dalian Passenger
DedicatedLineasthebackground,theintroductionisgiventotheobservationmethodandrequirementforsettlement
observationofYunliangheBridge.Thegeneralanalysisofthefuturesettlementvolumeofthepierandabutmentismade
withcurvefittingmethodandthepredictionmodelofrtheaccumulatedsettlementestablishedbythemetabolicGM(1,1)
modelofrgaysystem SOastoknow thesettlementlaw.
Researchconclusions:ThesettlementofthepierandabutmentofYunliangheBridgeofHarbin —Dalian Passenger
dedicatedLinebecomesstable.WiththemetabolicGM (1,1)modelofgraysystem,thepredictionmodelofr
accumulatedsettlementcanbeestablishedeasilybecauseofneedingalittlemeasureddata.Althoughthereisacertain
gapbetweenthepredicteddataandthemeasureddata,butthepredictionmodelcan reflectthechangetrendofthe
settlementattheobservationpointandtheapproximatesettlementvolumeattheobservationpointcanbeknownbefore
thenextobservation,SOthepredictionmodelissignificantinpredictionofthesettlement.Inaddition,theprediction
modelhasahighaccuracyanditcanbeusedofrpredictionoftheaccumulatedsettlement.
Keywords:bridge;pierandabutment;passengerdedicated line;settlementobservation;curvefitting;graysystem
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