高铁波浪状地形路基间过渡段沉降特性与控制效果
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摘要
针对深厚软土地区连续路堤路堑过渡段沉降控制,结合模糊层次分析法,采用沉降板、分层沉降管和单点沉降计3种监测技术,开展变形特性与工后沉降控制研究,并对工后沉降影响因素进行探讨。研究结果表明:根据地层特性选择地基处理方式,过渡段纵向差异沉降量较小,保证了线路平顺。各断面横向沉降路肩大于路基中心,铺轨前的横向差异沉降为4~9 mm。沉降增长速率在加载期明显变大,间歇期变小,进入恒载期后,沉降曲线逐渐变缓,虽略有回弹,但沉降逐渐趋于稳定。揭示了高速铁路软土路基沉降变形规律,并提出波浪状地形路基间过渡段工后沉降控制措施。研究结果为进一步理论研究和工程设计提供了有益的依据。
In order to control the settlement of continuous embankment and cutting transition section in deep soft soil area,the deformation characteristics and settlement analysis were performed after construction combined with fuzzy analytic hierarchy process and three kinds of monitoring techniques,including single-point settlement instrument,layered settlement instrument and settlement plate supervision. Meanwhile,the influencing factors were estimated after construction. The results show that ground treatment methods should be selected based on formation characteristics,and there exists small difference for high-speed railway transition section longitudinal deformation,which ensures the smoothness of the roadbed surface. According to the results of settlement testing in three sections,the values in shoulder are greater than that in embankment center,and the difference of lateral settlement is 4 ~ 9 mm before track construction. The increase rate of sedimentation under loading period is significantly larger and smaller during intermittent period. When being constant loading period,the settlement curve gradually slows although a slight rebound,but the settlement gradually tends to be stable. The solutions reveal the settlement characteristics of high-speed railway in soft subgrade. Based on this,the control measures of settlement after construction were proposed in transition section of wavy terrain subgrade. The results provide a useful reference for further theoretical studies and future similar projects.
In order to control the settlement of continuous embankment and cutting transition section in deep soft soil area,the deformation characteristics and settlement analysis were performed after construction combined with fuzzy analytic hierarchy process and three kinds of monitoring techniques,including single-point settlement instrument,layered settlement instrument and settlement plate supervision. Meanwhile,the influencing factors were estimated after construction. The results show that ground treatment methods should be selected based on formation characteristics,and there exists small difference for high-speed railway transition section longitudinal deformation,which ensures the smoothness of the roadbed surface. According to the results of settlement testing in three sections,the values in shoulder are greater than that in embankment center,and the difference of lateral settlement is 4 ~ 9 mm before track construction. The increase rate of sedimentation under loading period is significantly larger and smaller during intermittent period. When being constant loading period,the settlement curve gradually slows although a slight rebound,but the settlement gradually tends to be stable. The solutions reveal the settlement characteristics of high-speed railway in soft subgrade. Based on this,the control measures of settlement after construction were proposed in transition section of wavy terrain subgrade. The results provide a useful reference for further theoretical studies and future similar projects.
引文
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[12]李献民,梁艳慧,王梦恕.高速铁路无砟轨道隧-隧过渡段路基的动力不平顺及动力响应分析[J].土木工程学报,2013,46(12):90-96.LI Xianmin,LIANG Yanhui,WANG Mengshu.Analysis on dynamic irregularity and dynamic response of tunneltunnel subgrade transition zone of high-speed railway ballastless track[J].China Civil Engineering Journal,2013,46(12):90-96.
[13]蒋关鲁,王力伟,杭红星.路桥交界处地基附加应力修正计算方法[J].岩土工程学报,2013,35(2):208-218.JIANG Guanlu,WANG Liwei,HANG Hongxing.Modified method for additional stress of bridge-approach foundation under subgrade load[J].Chinese Journal of Geotechnical Engineering,2013,35(2):208-218.
[14]黄贯虹,方刚.系统工程方法与应用[M].广州:暨南大学出版社,2005.HUANG Guanhong,FANG Gang.System engineering method and application[M].Guangzhou:Jinan University Press,2005.
[15]TB 10020-2009,高速铁路设计规范(试行)[S].TB 10020-2009,Code for design of high speed railway[S].
[2]赵坪锐.客运专线无砟轨道设计理论与方法[D].成都:西南交通大学,2008:8-19.ZHAO Pingrui.Research on the design theory and method for ballastless track on passenger dedicated line[D].Chengdu:Southwest Jiaotong University,2008:8-19.
[3]蔡成标,徐鹏.高速铁路无砟轨道关键设计参数动力学研究[J].西南交通大学学报,2010,45(4):493-497.CAI Chengbiao,XU Peng.Dynamic analysis of key design parameters for ballastless track of high-speed railway[J].Journal of Southwest Jiaotong University,2010,45(4):493-497.
[4]SATO Y.Study on high-frequency vibrations in track operation with high-speed trains[J].Quarterly Report of Rtri,1977,18(3):109-114.
[5]陈果元,魏丽敏,杨果林.胡家屯中桥路桥过渡段动力特性试验研究[J].振动与冲击,2010,29(6):184-188.CHEN Guoyuan,WEI Limin,YANG Guolin.Experimental research on dynamic properties of road-bridge transition section of hujiatun medium bridge[J].Journal of Vibration and Shock,2010,29(6):184-188.
[6]MA Weibin,SHI Cunlin,DU Xiaoyan.Dynamic experimental study on the effects of trackstructure by mechanical property of railway subgrade[C]//Proceedings of the Second Chian-Japan Geotechnical Symposium,2005.
[7]Coelho B,H Lscher P,Priest J,et al.An assessment of transition zone performance[C]//55 City Road,London EC1Y ISP,United Kingdom:SAGE Publications Ltd,2011.
[8]盛岱超,张升,李希.高速列车与路基冻胀相互作用机理[J].岩土工程学报,2013,35(12):2186-2191.SHENG Daichao,ZHANG Sheng,Li Xi.Effects of train loads on frost heave of embankments[J].Chinese Journal of Geotechnical Engineering,2013,35(12):2186-2191.
[9]黄晚清,陆阳,罗书学.秦沈客运专线路涵过渡段动力测试与分析[J].西南交通大学学报,2005,40(2):220-223.HUANG Wanqing,LU Yang,LUO Shuxue.Dynamic stress measurement and analysis of subgrade-culvert transition section on Qinhuangdao-Shenyang passenger special line[J].Journal of Southwest Jiaotong University,2005,40(2):220-223.
[10]陈湘亮,王永和,王灿辉.高速铁路过渡段路基自振频率的模态分析与试验[J].中南大学学报(自然科学版),2012,43(1):322-327.CHEN Xiangliang,WANG Yonghe,WANG Canhui.Modal analysis and experiment research on natural frequencies of transition section subgrade of high-speed railway[J].Journal of Central South University(Science and Technology),2012,43(1):322-327.
[11]Ahlbeck O R.Effects of track dynamics impedance on vehicle-track interactions[J].Vehicle System Dynamics Supplement,1995(24):58-71.
[12]李献民,梁艳慧,王梦恕.高速铁路无砟轨道隧-隧过渡段路基的动力不平顺及动力响应分析[J].土木工程学报,2013,46(12):90-96.LI Xianmin,LIANG Yanhui,WANG Mengshu.Analysis on dynamic irregularity and dynamic response of tunneltunnel subgrade transition zone of high-speed railway ballastless track[J].China Civil Engineering Journal,2013,46(12):90-96.
[13]蒋关鲁,王力伟,杭红星.路桥交界处地基附加应力修正计算方法[J].岩土工程学报,2013,35(2):208-218.JIANG Guanlu,WANG Liwei,HANG Hongxing.Modified method for additional stress of bridge-approach foundation under subgrade load[J].Chinese Journal of Geotechnical Engineering,2013,35(2):208-218.
[14]黄贯虹,方刚.系统工程方法与应用[M].广州:暨南大学出版社,2005.HUANG Guanhong,FANG Gang.System engineering method and application[M].Guangzhou:Jinan University Press,2005.
[15]TB 10020-2009,高速铁路设计规范(试行)[S].TB 10020-2009,Code for design of high speed railway[S].