隧道斜交横通道施工对主隧道衬砌结构的影响研究

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Abstract For the influence of skew horizontal adit construction on the main tunnel lining structure，the Tianhengshan highway tunnel engineering of Harbin by-pass city expressway is taken as an example and the actual measurement and 3D finite element simulation are adopted to study the deformation regularity and the stress characteristics of main tunnel lining structure during the horizontal adit construction stage．The research results are shown as follows：(1) the construction of horizontal adit leads the main tunnel lining near intersection to occurre deformation and stress concentration，and the influence range in acute angle side of intersection is 1.82D(D is main tunnel span)，in obtuse angle side of intersection is 1.32D；(2) the lining deformation mainly is arch settlement，and secondly is side wall expansion；(3) the excavation of horizontal adit destroys the original arch effect of main tunnel，so as to create the stress concentration on the lining at the intersection；(4) with the excavation depth increment of horizontal adit，the deformation and stress of the main tunnel lining structure gradually decrease and tend to be stable；(5) The safety factors of main tunnel lining structural strength are greater than design values of 2.0 on both sides of the intersection；(6) the deformation and stress concentration at the intersection acute angle side are greater than that of the obtuse angle side，but the safety factor of the former is less than that of the latter．The research results can be used as reference for the design and construction of other similar engineering.

Key words： tunnelling engineering skew horizontal adit lining structure 3D finite element method safety factor

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	Articles by authors
	LUO Yanbin1
	CHEN Jianxun1
	WANG Mengshu2

Cite this article:

LUO Yanbin1,CHEN Jianxun1,WANG Mengshu2. STUDY OF INFLUENCE OF SKEW HORIZONTAL ADIT TUNNEL CONSTRUCTION ON MAIN TUNNEL LINING STRUCTURE[J]. , 2010, 29(S2): 3792-3798.

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https://rockmech.whrsm.ac.cn/EN/Y2010/V29/IS2/3792

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