成绵乐高速铁路成都黏土地基蠕变参数反演及沉降预测
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摘要
在对成都粘土流变本构模型进行研究的基础上,应用Burgers体模型对成—绵—乐高速铁路成都牛龙路一带地基土建立目标函数。运用分层迭代反演土层的粘-弹性参数,以实测地基沉降为基础,对观测后期沉降进行预测,并与后续观测记录对比,从而验证了Burgers模型可在一定精度下满足沉降预测的要求,为本工程安全运营提供指导,并为同类研究提供了依据。
Based on Chengdu clay rheological constitutive model,this article applied the Burgers model to establish the objective function for foundation soil in the area of Chengdu Niulong Road in Cheng-Mian-Le high-speed railway. By the method of iterative back analysis by layer of visco-elastic parameters,based on measured result,predicting the late settlement,and comparing with the follow-up observations records to verify the Burgers model can meet the accuracy requirements of settlement prediction,so as to provide guidance for the safe operation of the project,and also provide a basis for similar studies.
Based on Chengdu clay rheological constitutive model,this article applied the Burgers model to establish the objective function for foundation soil in the area of Chengdu Niulong Road in Cheng-Mian-Le high-speed railway. By the method of iterative back analysis by layer of visco-elastic parameters,based on measured result,predicting the late settlement,and comparing with the follow-up observations records to verify the Burgers model can meet the accuracy requirements of settlement prediction,so as to provide guidance for the safe operation of the project,and also provide a basis for similar studies.
引文
[1]张晓超,郑海军.成都黏土蠕变试验及其蠕变模型研究[J].实验技术与管理,2010,10(10):52-55.
[2]史旦达,周健,贾敏才,等.考虑蠕变性状的港区软土地基参数反演和长期沉降预测[J].岩土力学,2009,3(3):746-750.
[3]杨文东,张强勇,陈芳,等.基于承压板试验的岩体蠕变参数反演统一解析公式法[J].岩土力学,2012,2(2):367-374.
[4]蒙上阳,唐国金,雷勇军,等.Burgers模型的参数获取方法[J].固体火箭技术,2003,2(26):27-29.
[5]吕庆,尚岳全,陈允法,等.高填方路堤黏弹性参数反演与工后沉降预测分析[J].岩石力学与工程学报,2005,24(7):1231-1235.
[6]谭昌明,周建,黄广龙.多层软土地基沉降的分层迭代反演综合预测法[J].中国公路学报,2001,14(4):28-32.
[7]陶波,伍法权,郭改梅,等.西原模型对岩石流变特性的适应性及其参数确定[J].岩石力学与工程学报,2005,24(17):3165-3171.
[8]Mesri G,Febres-Cordero E,Shield D R,et al.Shear tress-straintime behavior of clays[J].Geo-technique,1981,31(4):537-552.
[2]史旦达,周健,贾敏才,等.考虑蠕变性状的港区软土地基参数反演和长期沉降预测[J].岩土力学,2009,3(3):746-750.
[3]杨文东,张强勇,陈芳,等.基于承压板试验的岩体蠕变参数反演统一解析公式法[J].岩土力学,2012,2(2):367-374.
[4]蒙上阳,唐国金,雷勇军,等.Burgers模型的参数获取方法[J].固体火箭技术,2003,2(26):27-29.
[5]吕庆,尚岳全,陈允法,等.高填方路堤黏弹性参数反演与工后沉降预测分析[J].岩石力学与工程学报,2005,24(7):1231-1235.
[6]谭昌明,周建,黄广龙.多层软土地基沉降的分层迭代反演综合预测法[J].中国公路学报,2001,14(4):28-32.
[7]陶波,伍法权,郭改梅,等.西原模型对岩石流变特性的适应性及其参数确定[J].岩石力学与工程学报,2005,24(17):3165-3171.
[8]Mesri G,Febres-Cordero E,Shield D R,et al.Shear tress-straintime behavior of clays[J].Geo-technique,1981,31(4):537-552.