强震区桥梁墩台减载支撑加固技术研究
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摘要
强震区桥梁墩台岸坡往往在地震作用下产生坍塌滑坡,造成墩台后倾滑移以及台后路面坍塌,其导致交通线通道中断。文章介绍一种桥台墩台减载支撑加固技术,用于解决桥梁岸坡滑移问题,从理论上研究了墩台震动破坏机制,得出桥台岸坡滑动面应变速度以及与滑动线夹角,以及作用于岸坡外力做功和塑性流动消耗能量,依据能量准则推导出岸坡最大地震主动土压力及所对应滑动面倾角,最后建立了此技术相应计算方法、设计方法。
Bridge abutment slope often collapsed landslide in the earthquake zone,caused abutment backward slip and road collapsed,interrupt the lead lines of communication channel.This paper describes a support abutment pier load shedding reinforcement techniques,for solving abutment slope slip,study on the failure mechanism for theory,derived slope sliding abutment strain rate and the sliding surface line angle,and the role of external forces acting on the slope and plastic flow of the consumption of energy,based on the energy criterion derived the maximum slope seismic active earth pressure and the corresponding angle of sliding surface,and finally establish the appropriate method,the design method for this technology.
Bridge abutment slope often collapsed landslide in the earthquake zone,caused abutment backward slip and road collapsed,interrupt the lead lines of communication channel.This paper describes a support abutment pier load shedding reinforcement techniques,for solving abutment slope slip,study on the failure mechanism for theory,derived slope sliding abutment strain rate and the sliding surface line angle,and the role of external forces acting on the slope and plastic flow of the consumption of energy,based on the energy criterion derived the maximum slope seismic active earth pressure and the corresponding angle of sliding surface,and finally establish the appropriate method,the design method for this technology.
引文
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[2]宋胜武.汶川大地震工程震害调查分析与研究[M].北京:科学出版社,2009.
[3]张鹏,陈新民,王旭东.近断层地震动与汶川地震灾区滑坡破坏特征分析[J].南京工业大学学报:自然科学版,2009,31(1):55-59.
[4]刘承刚.拱桥阻滑板的原理及应用[J].交通标准化,2010(7):201-203.
[5]T.Leslie Youd,Ben L.Carter.Influence of soil softening andliquefaction on special acceleration[J].Journal of Geotechnicaland Geoenvironmental Engineering,ASCE,2005,131(7):811-825.
[6]S.P.GOPAL MADABHUSHI.Ground improveme-nt methods forliquefaction remediation[J].Ground Improvement,2007,11(4):141-147.
[7]M.R.Honarvar,M.R.Bahaari,B.Asgarian.Effect of Grouting inJacket Type Offshore Platforms PileLeg Interaction in NonlinearRange of Deformation[J].Journal of Offshore Mechanics andArctic Engineerin,2008,130(4):264-269.
[8]Scholl R E,King J L.Strong Ground Motion Simulation andEarthquake Engineering Applicati-ons[M].CA,USA:EarthquakeEngineering Research Institute,1985.
[9]刘瑞,张志铁.水工钢筋混凝土结构学[M].北京:中国水利水电出版社,1996.
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