Application of Parameteradjustmentbased Selecting Weight Iteration Method in Crosssection Monitoring of Metro Works

doi:10.3973/j.issn.1672-741X.2014.11.004

Tunnel Construction ›› 2014, Vol. 34 ›› Issue (11): 1036-1041.DOI: 10.3973/j.issn.1672-741X.2014.11.004

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Application of Parameteradjustmentbased Selecting Weight Iteration Method in Crosssection Monitoring of Metro Works

HE Lei¹, CHEN Hao², SUI Xiuzhen²

(1. Nanjing Institute of Surveying, Mapping & Geotechnical Investigation, Co., Ltd., Nanjing 210005, Jiangsu, China; 2. Yiwu Surveying & Design Institute, Yiwu 322000, Zhejiang, China)

Received:2014-05-16 Revised:2014-10-06 Online:2014-11-20 Published:2014-11-20

Abstract

Abstract:

Regarding the fitting method in the crosssection monitoring of Metro tunnels, least square method and selecting weight iteration method are presented. The calculation procedures for selecting weight iteration method are realized on basis of MATLAB. The two fitting methods mentioned above are compared on basis of the monitoring data of Line 10 of Nanjing Metro. Conclusions drawn are as follows: Without outliers, Both the least square method and the selecting weight iteration method have high fitting precision; With the increase of the number of outliers, the least squares fitting data become to be distorted and the outliers cannot be found correctly; The outliers can be found correctly by selecting weight iteration method and the monitoring points without outliers have higher fitting precision.

Key words: Metro, crosssection monitoring, crosssection fitting, least square, selecting weight iteration, outliers

CLC Number:

U 455

HE Lei, CHEN Hao, SUI Xiuzhen. Application of Parameteradjustmentbased Selecting Weight Iteration Method in Crosssection Monitoring of Metro Works[J]. Tunnel Construction, 2014, 34(11): 1036-1041.

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Application of Parameteradjustmentbased Selecting Weight Iteration Method in Crosssection Monitoring of Metro Works

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