隧道开挖地层反应曲线的外显分析

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摘要收敛–约束法理论是应用于隧道支撑设计的简化分析方法，所使用的约束损失是该分析方法的关键因子。基于隧道开挖前进效应与约束损失的关系，建立隧道掘进效应函数，并采用约束损失的递增方法与简易试算表工具，同时依据应力–位移力学理论模式，推导在静水应力条件下圆形隧道开挖于弹塑性地层的解析解，进而提出模拟地层反应曲线弹塑性非线性行为的外显分析法。其分析结果包含约束损失递增方法的计算内容与步骤说明，以及约束损失弹性极限值、塑性半径、弹塑性区的径向应力与径向位移。此分析法与研发的有限元分析结果比较显示，二者呈现相似且一致的非线性趋势。

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	李煜舲
	李文元

关键词 ：隧道工程；收敛&ndash, 约束法；约束损失；外显分析；有限元分析

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

引用本文:

李煜舲，李文元. 隧道开挖地层反应曲线的外显分析[J]. 岩石力学与工程学报, 2010, 29(S2): 3685-3692.
LEE Yulin，LEE Wenyuan. EXPLICIT ANALYSIS OF GROUND REACTION CURVE IN TUNNEL EXCAVATION. , 2010, 29(S2): 3685-3692.

链接本文:

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

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