Risk Analysis on Blasting of Boulder and Bedrock Intrusion in Seacrossing Tunnel Bored by Shield Machine

doi:10.3973/j.issn.1672-741X.2012.z2.006

Tunnel Construction ›› 2012, Vol. 32 ›› Issue (增刊2): 31-36.DOI: 10.3973/j.issn.1672-741X.2012.z2.006

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Risk Analysis on Blasting of Boulder and Bedrock Intrusion in Seacrossing Tunnel Bored by Shield Machine

YOU Yongfeng, LIANG Kuisheng

(China Railway Tunnel Stock Co., Ltd., Zhengzhou 450003, Henan,China)

Received:2012-07-13 Revised:2012-09-13 Online:2012-12-20 Published:2013-02-19

Abstract

Abstract:

The rock breaking efficiency of cutter tools of shield machine is low in complex stratum with local high intension bedrocks and boulders. The controlled drilling and blasting method and controlled broken rocks are synthetically analyzed. The influences induced by blasting are systematically classed. The evaluation system of blasting risks of boulder and bedrock intrusion is established. The factor weight and membership function of each risk grade are determined by means of APH method and fuzzy method, so as to estimate the risk acceptable grade. The practice shows that the mentioned methods are reliable and effective.

Key words: seacrossing tunnel, boulder, bedrock intrusion, controlled blasting, fuzzy analytic hierarchy process, risk analysis

YOU Yongfeng, LIANG Kuisheng. Risk Analysis on Blasting of Boulder and Bedrock Intrusion in Seacrossing Tunnel Bored by Shield Machine[J]. Tunnel Construction, 2012, 32(增刊2): 31-36.

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Risk Analysis on Blasting of Boulder and Bedrock Intrusion in Seacrossing Tunnel Bored by Shield Machine

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