土工基础

›› 2013, Vol. 27 ›› Issue (2): 79-82.

• 工程实录 • 上一篇    下一篇

Asaoka法在高速铁路沉降分析中的应用

罗存喜   

  1. （中铁四院集团房地产开发有限公司，湖北武汉 430063）
  • 收稿日期:2012-11-26 出版日期:2013-04-20 发布日期:2013-04-26
  • 作者简介:罗存喜(1966-)，男，学士学位，高级工程师，研究方向为岩土工程。

Application of Asaoka Method in Predicting the Settlement of High Speed Rail Embankments

LUO Cunxi   

  1. (China Railway SIYUAN Real Estate Development Co., Ltd., Wuhan 430063)
  • Received:2012-11-26 Online:2013-04-20 Published:2013-04-26

摘要： Asaoka法是高速铁路沉降预测中最为常用的回归方法之一，但该法所需数据必须是等时间间隔的，实测数据的时间间距大多不能满足要求，需要通过相应的转换，但目前等时距处理方面的文献相对较少。为此，在某高铁无砟轨道路基实测资料的基础上，分别采用线性插值、样条插值、分段三次埃尔米特插值等方法，对观测数据进行了等时间间距处理，对比分析了不同处理方法对预测精度和预测结果的影响，可供解决类似的高铁无砟轨道沉降预测问题借鉴。

关键词: Asaoka法, 沉降预测, 等时间间隔, 线性插值, 样条插值, 分段三次埃尔米特插值

Abstract: The Asaoka Method is one of most used graphical analysis methods in the settlement prediction of highspeed rail embankments. However, the limitation of this method is that the settlement data interval must be constant. In the construction practice, the monitoring data could not always meet this requirement so that the data conversion is necessary. Currently, little research literatures are available regarding the data conversion into the constant time intervals. This paper introduces three methods of constant time interval data conversion; namely, linear interpolation; spline interpolation and piecewise cubic Hermite interpolation. All methods are used in the ultimate settlement prediction analysis of a highspeed rail embankment. The accuracy of these predictions is also compared in the paper.

Key words: Asaoka Method, Ultimate Settlement Prediction, Constant Time Interval, Linear Interpolation Method, Spline Interpolation Method, Piecewise Cubic Hermite Interpolation Method