摘要
隧道竣工后通常要进行中心线形测定,一般的做法是测量隧道断面上一系列点进行拟合。拟合所得的椭圆中心即为隧道断面中心,并与设计线形进行比较。本文介绍并比较了最小二乘直接拟合椭圆法、最小平方中值法拟合椭圆法,在此基础上提出了一种改进的方法,即结合两种椭圆拟合方法的优缺点进行组合,并通过样本分位值法先剔除数据中的粗差再进行拟合,增强了拟合结果的稳健性,通过上海长兴岛至崇明岛越江隧道实测数据进行了验证。
It always needs to work out the line type of completed tunnel in the real projecting. Usually, the direct least-square ellipse fitting method is used a lot. This paper introduces some other ways to solve this problem, presenting an advanced arithmetic to reach the same goal. Furthermore, the paper compares different results by different methods and makes use of a set of real surveying data of Shanghai Yangtze River Tunnel to explain the availability of the mentioned methods.
出处
《工程勘察》
CSCD
北大核心
2009年第9期77-80,共4页
Geotechnical Investigation & Surveying
关键词
隧道
椭圆
拟合
最小二乘
稳健
tunnel
ellipse
fitting
least-square
robust
