距离判别法在公路隧道围岩分类中的应用

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Application of Distance Discriminant Analysis Method in Classification of Surrounding Rock Mass in Highway Tunnel

WANG Ji-liang , CHEN Jian-ping, YANG Jing

College of Construction Engineering，Jilin University，Changchun 130026，China

Received:2008-01-16 Revised:1900-01-01 Online:2008-11-26 Published:2008-11-26
Contact: WANG Ji-liang

Abstract

Abstract: A method of distance discriminant analysis is used to classify the surrounding rock of highway tunnel. Based on experiences, several key factors, such as the uniaxial compressive strength σ_c , average spacing of joints d, values of rock quality RQD and groundwater condition, are selected to be parameters of discriminant analysis model. So a model of distance discriminant analysis is established though training a large set of surrounding rockmass samples which come from a series of tunnel projects. The discriminant results are validated and have a low misjudgment ratio. The results are also the same as the results from ANN method. Furthermore, the analysis result of the class Ⅳ for surrounding rock in selected parts of Fengshuling tunnel of Zhuyong highway in Zhejiang Province, which is calculated by the method of distance discriminant analysis, is in good agreement with standard method.

Key words: surrounding rock classification, distance discriminant analysis, misjudgment ratio, highway tunnel

CLC Number:

P642

WANG Ji-liang , CHEN Jian-ping, YANG Jing. Application of Distance Discriminant Analysis Method in Classification of Surrounding Rock Mass in Highway Tunnel[J].J4, 2008, 38(6): 999-1004.

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Application of Distance Discriminant Analysis Method in Classification of Surrounding Rock Mass in Highway Tunnel

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