土工基础

›› 2019, Vol. 33 ›› Issue (3): 343-346.

• 工程实录 • 上一篇    下一篇

幂指函数在桥梁桩基沉降预测中的应用研究

李洪涛，张拥军，刘思佳，胡同旭，王 文   

  1. （青岛理工大学，山东青岛 266011）
  • 收稿日期:2018-08-24 修回日期:2018-09-14 出版日期:2019-06-20 发布日期:2019-08-16
  • 作者简介:李洪涛（1991-），男，在读研究生，研究方向为岩土工程。

Application of Exponential Function Model in the Settlement Prediction of Pile Supported Bridge Foundations

LI Hongtao, LIU Sijia, HU Tongxu, WANG Wen   

  1. (Qindao University of Technology, Qingdao 266011)
  • Received:2018-08-24 Revised:2018-09-14 Online:2019-06-20 Published:2019-08-16

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。

关键词: 桥梁桩基, 沉降预测, 幂指函数模型, 高速铁路

Abstract: 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.

Key words: Pile Supported Bridge Foundations, Settlement Prediction, Exponential Function Model, High Speed Rail