彭水隧道出口不良地质大跨段的施工技术

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Abstract According to the geological features of the exit portal of Pengshui tunnel with shallow depth，rich ground water and bedding strata，numerical analysis of the construction technique for the large span tunnel is carried out by means of elasto-plastic finite clement method in this paper. Meanwhile，the pipe-roof grouting and pile anchoring method have been adopted also to strengthen the bedding strata of the large span tunnel. It has been verified that the method and measures presented in this paper can not only safeguard the driving of the tunnel with adverse geological strata，but also enhance the construction progress as well ,and has gained desired effect.

Key words： large span tunnel adverse geology numerical analysis pipe-roof protection pile-anchoring method

Received: 10 June 2002

PACS:

U462

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	LEI Sheng-xiang 1
	ZHOD Xiao-jun2

Cite this article:

LEI Sheng-xiang 1,ZHOD Xiao-jun2. CONSTRUCTION TECHNIQUE FOR LARGE SPAN EXIT PORTAL OF PENGSHUI TUNNEL WITH ADVERSE GEOLOGICAL STRATA[J]. Journal of Railway Engineering Society, 2002, 19(3): 70-74.

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http://tdgcxb.crec.cn/EN/ OR http://tdgcxb.crec.cn/EN/Y2002/V19/I3/70