路桥过渡段路基速度动力特性试验研究
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摘要
通过采用动测试试验系统对秦沈客运专线一路桥过渡段路基速度动力特性进行现场试验研究,得到了行车速度对铁道无缝线路路桥过渡段路基动应力的在线路纵向上和深度方向上的影响特征;与此同时,定义了速度动力系数的概念,试验得出过渡段路基中速度动力系数都小于0.3,并预测了影响路基动力特性的临界速度的存在.研究结果对铁路客运专线过渡段结构的设计和施工有重要的指导意义.
Through dynamic testing system,the speed-dynamic characteristic of a bridge-approach roadbed was studied in field test in the Qin-Shen passenger transport special railway line,the dynamic stress influence characteristic of seamless track bridge-approach roadbed in line and depth was obtained under train's running speed;at the same time,the conception of speed power coefficient is presented,and the speed power coefficient of bridge-approach roadbed was lesser than 0.3,and the existence of the critical speed which influence the roadbed dynamic characteristic was forecast.The research results provide some important instruction for the design and construction of bridge-approach structure of passenger transport special railway line.
Through dynamic testing system,the speed-dynamic characteristic of a bridge-approach roadbed was studied in field test in the Qin-Shen passenger transport special railway line,the dynamic stress influence characteristic of seamless track bridge-approach roadbed in line and depth was obtained under train's running speed;at the same time,the conception of speed power coefficient is presented,and the speed power coefficient of bridge-approach roadbed was lesser than 0.3,and the existence of the critical speed which influence the roadbed dynamic characteristic was forecast.The research results provide some important instruction for the design and construction of bridge-approach structure of passenger transport special railway line.
引文
[1]李献民.高速铁路加筋过渡段静动力特性数值分析及试验研究[D].长沙:中南大学,2004.
[2]李献民,王永和,律文田.土工格栅加固路桥过渡段的动测试分析[J].中南大学学报,2004,35(5):860-864.
[3]Sunaga,Makoto.Vibration behavior of roadbed on softgrounds under train load[J].Quartly Report of RTRI,1990(31):29-35.
[4]Leykauf,Gunther,Mattner,et al.Elastisches Verformungsver-Halten des Eisenbahnoberbaus[J].Eisenbahnige-nieur,1990,41(3):111-119.
[5]C H Gobel,V C Weisemann.Effectiveness of a reinforcingGeogrid in a railway subbase under dynamic loads[J].Geotexiles and Geomembranes,1994(13):91-99.
[6]蔡成标,翟婉明,赵铁军,等.列车通过路桥过渡段时的动力作用研究[J].交通运输工程学报,2001,1(1):17-19.
[7]杨灿文,龚亚丽.列车通过时路基的动应力和振动[J].土木工程学报,1963,9(2):49-57.
[8]曹新文,蔡英.铁路路基动态特性的模型试验研究[J].西南交通大学学报,1996,31(1):36-41.
[9]李献民,王永和,倪宏革,等.动力分散型机车在路涵过渡段的动应力应变研究[J].岩土力学,2004,25(7):1167-1170.
[10]李献民,肖宏彬,王永和.行车速度对路桥过渡段基床动力作用研究[J].地震工程与工程振动,2005,25(1):49-53.
[11]李献民,王永和,杨果林,等.高速下过渡段路基动响应特性研究[J].岩土工程学报,2004,26(1):100-104.
[12]郝瀛.铁道工程[M].北京:中国铁道出版社,2000:179-194.
[13]杨广庆,刘树山,刘田明.高速铁路路基设计与施工[M].北京:中国铁道出版社,1999:17-20,95-111.
[14]李献民,宋云祥.秦沈高速铁路路桥涵过渡段路基沉降变形特征研究[J].地质灾害与环境保护,2007(3):95-98.
[15]李献民,宋云祥.秦沈高速铁路路桥涵过渡段结构填筑工艺及质量控制研究[J].地质灾害与环境保护,2007(4):213-217.
[2]李献民,王永和,律文田.土工格栅加固路桥过渡段的动测试分析[J].中南大学学报,2004,35(5):860-864.
[3]Sunaga,Makoto.Vibration behavior of roadbed on softgrounds under train load[J].Quartly Report of RTRI,1990(31):29-35.
[4]Leykauf,Gunther,Mattner,et al.Elastisches Verformungsver-Halten des Eisenbahnoberbaus[J].Eisenbahnige-nieur,1990,41(3):111-119.
[5]C H Gobel,V C Weisemann.Effectiveness of a reinforcingGeogrid in a railway subbase under dynamic loads[J].Geotexiles and Geomembranes,1994(13):91-99.
[6]蔡成标,翟婉明,赵铁军,等.列车通过路桥过渡段时的动力作用研究[J].交通运输工程学报,2001,1(1):17-19.
[7]杨灿文,龚亚丽.列车通过时路基的动应力和振动[J].土木工程学报,1963,9(2):49-57.
[8]曹新文,蔡英.铁路路基动态特性的模型试验研究[J].西南交通大学学报,1996,31(1):36-41.
[9]李献民,王永和,倪宏革,等.动力分散型机车在路涵过渡段的动应力应变研究[J].岩土力学,2004,25(7):1167-1170.
[10]李献民,肖宏彬,王永和.行车速度对路桥过渡段基床动力作用研究[J].地震工程与工程振动,2005,25(1):49-53.
[11]李献民,王永和,杨果林,等.高速下过渡段路基动响应特性研究[J].岩土工程学报,2004,26(1):100-104.
[12]郝瀛.铁道工程[M].北京:中国铁道出版社,2000:179-194.
[13]杨广庆,刘树山,刘田明.高速铁路路基设计与施工[M].北京:中国铁道出版社,1999:17-20,95-111.
[14]李献民,宋云祥.秦沈高速铁路路桥涵过渡段路基沉降变形特征研究[J].地质灾害与环境保护,2007(3):95-98.
[15]李献民,宋云祥.秦沈高速铁路路桥涵过渡段结构填筑工艺及质量控制研究[J].地质灾害与环境保护,2007(4):213-217.
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