隧道开挖地层反应曲线的外显分析

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Abstract For design of support system of tunnel，the convergence-confinement method is a simplified analysis theory. Obviously，the confinement loss used by the theory is an important influential factor. According to the relationship between the confinement loss and tunnel advancing effect，the advancing effect function is proposed. The analytical solution for the elastoplastic response of circular tunnel excavation in rock mass is considered. The explicit analysis method taken into account the increment method of confinement loss is particularly proposed by using the spreadsheet for the computation of stress and displacement distribution around circular tunnel. The analysis contains the calculation steps of increment of confinement loss，elastic limit of confinement loss，plastic radius，radial stress and displacement in plastic zone. The results obtained by the finite element analysis and the explicit analysis are approximately consistent in the ground reaction curve.

Key words： tunnelling engineering convergence-confinement method confinement loss explicit analysis finite element analysis

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	LEE Yulin
	LEE Wenyuan

Cite this article:

LEE Yulin,LEE Wenyuan. EXPLICIT ANALYSIS OF GROUND REACTION CURVE IN TUNNEL EXCAVATION[J]. , 2010, 29(S2): 3685-3692.

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https://rockmech.whrsm.ac.cn/EN/Y2010/V29/IS2/3685

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