幂指函数在桥梁桩基沉降预测中的应用研究
|
摘要
鉴于高速铁路桥梁在前期施工时,随着荷载的增加桩基沉降较大的基本特征,引入一种新的数学模型——幂指函数模型,用来预测桩基在桥墩施工后的沉降。分析了函数的基本特征,介绍了模型参数的确定方法。结合新建崇礼铁路桥项目工程实例,比较了指数函数模型、Logistic函数模型和幂指函数模型对桩基沉降的预测情况,对三种模型的预测效果进行了评价。结果表明,利用幂指函数模型对桩基沉降进行预测可以得到较好的预测效果。
An exponential function is induced to predict the piled supported bridge pier settlement during the construction of high-speed rail lines. This paper briefly introduces the characteristics of this exponential function and method to determine its parameters. This paper also presents a case history of the new construction of Congli railway bridge. Different models were used to predict the piled foundation settlement: index function model, Logistic function model as well as exponential function model. The results indicate that the exponential function have a better prediction of the foundation settlement.
An exponential function is induced to predict the piled supported bridge pier settlement during the construction of high-speed rail lines. This paper briefly introduces the characteristics of this exponential function and method to determine its parameters. This paper also presents a case history of the new construction of Congli railway bridge. Different models were used to predict the piled foundation settlement: index function model, Logistic function model as well as exponential function model. The results indicate that the exponential function have a better prediction of the foundation settlement.
引文
[1] 刘射洪,袁聚云,赵昕.地基沉降预测模型研究现状综述[J].工业建筑,2014,44(增刊):738-741.
[2] 宰金珉,梅国雄.全过程的沉降量预测方法研究[J].岩土力学,2000,21(4):322-325.
[3] 凌胜任.Logistic模型在地面沉降预测中的应用[J].测绘工程.2016,25(4):78-80.
[4] 郑鹏武,谭忠盛,朱元生,等.地铁施工引起地表沉降的Logistic模型预测及应用[J].中国安全科学学报,2006,16(3):23-26.
[5] 张丽萍.两种指数曲线法在公路地基沉降计算中的对比[J].西部探矿工程,2007(5):26-28.
[6] 赵春风,李尚飞,鲁嘉,等.完整指数函数拟合单桩荷载-沉降曲线的分析[J].同济大学学报(自然科学版),2010,38(4):486-492.
[7] 罗浩,马建林,周洪燕,等.沉降曲线预测方法-变形过程指数法[J].岩土力学,2009,30(增刊2):374-376.
[8] 牛文杰,刘莽.一种利用数值模拟和完整指数函数模型求解单桩基础极限承载力的算法[J].建筑结构,2016,46(增刊):799-802.
[9] 涂许杭,王志亮,梁振淼,等.修正的威布尔模型在沉降预测中的应用研究[J].岩土力学,2005,26(4):621-628.
[10] 苗胜军,李军才,王克忠.高层建筑地基沉降量推算方法的探讨[J].建筑结构,2005,35(5):50-52.
[11] 明祖涛,莫懦,游振兴,等.高速铁路路基沉降预测模型的研究[J].测绘通报,2012(9):61-64.
[2] 宰金珉,梅国雄.全过程的沉降量预测方法研究[J].岩土力学,2000,21(4):322-325.
[3] 凌胜任.Logistic模型在地面沉降预测中的应用[J].测绘工程.2016,25(4):78-80.
[4] 郑鹏武,谭忠盛,朱元生,等.地铁施工引起地表沉降的Logistic模型预测及应用[J].中国安全科学学报,2006,16(3):23-26.
[5] 张丽萍.两种指数曲线法在公路地基沉降计算中的对比[J].西部探矿工程,2007(5):26-28.
[6] 赵春风,李尚飞,鲁嘉,等.完整指数函数拟合单桩荷载-沉降曲线的分析[J].同济大学学报(自然科学版),2010,38(4):486-492.
[7] 罗浩,马建林,周洪燕,等.沉降曲线预测方法-变形过程指数法[J].岩土力学,2009,30(增刊2):374-376.
[8] 牛文杰,刘莽.一种利用数值模拟和完整指数函数模型求解单桩基础极限承载力的算法[J].建筑结构,2016,46(增刊):799-802.
[9] 涂许杭,王志亮,梁振淼,等.修正的威布尔模型在沉降预测中的应用研究[J].岩土力学,2005,26(4):621-628.
[10] 苗胜军,李军才,王克忠.高层建筑地基沉降量推算方法的探讨[J].建筑结构,2005,35(5):50-52.
[11] 明祖涛,莫懦,游振兴,等.高速铁路路基沉降预测模型的研究[J].测绘通报,2012(9):61-64.