Comments on Cover Thickness of Qingdao Metro

doi:10.3973/j.issn.1672-741X.2012.03.014

Tunnel Construction ›› 2012, Vol. 32 ›› Issue (3): 341-345.DOI: 10.3973/j.issn.1672-741X.2012.03.014

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Comments on Cover Thickness of Qingdao Metro

HUA Fucai^1,2

(1. Beijing Jiaotong University, Beijing 100044,China;  2.Beijing Urban Engineering Design & Research Institute Co., Ltd., Beijing 100037, China)

Received:2011-12-01 Revised:2012-05-02 Online:2012-06-20 Published:2012-07-09

Abstract

Abstract: Comments are made on the cover thickness of Metro works, with No. 3 line of Qingdao Metro as an example. The coverspan ratio of Metro tunnels is calculated according to different codes and theories and a rational quantitative theoretical value is obtained by means of comparison and analysis. Qualitative analysis is made on the cover thickness of Metro tunnels located in granite strata in terms of construction technology, environmental influence, engineering economical efficiency, functional requirements and entrance/exit arrangement. Recommendations are made on the subsequent construction of other lines of Qingdao Metro, so as to overcome the construction difficulties, minimize the influence on the surrounding environment and reduce the cost.

Key words: Qingdao Metro, cover, coverspan ratio, granite, mining method

HUA Fucai. Comments on Cover Thickness of Qingdao Metro[J]. Tunnel Construction, 2012, 32(3): 341-345.

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Comments on Cover Thickness of Qingdao Metro

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