管棚法应用于软土地层的稳定性分析

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摘要在软土地区采用管棚法施工浅埋隧道，管棚间以及掌子面土体的稳定是影响“棚架体系”能否发挥的决定性因素。首先分析影响管棚间土体形成微拱的因素，根据莫尔–库仑抗剪强度理论，推导管棚间土体形成微拱的判定方法，即拱顶和拱脚同时处于稳定状态。其次将掌子面稳定假定为上覆荷载作用下的三维边坡稳定问题，推导管棚法隧道掌子面稳定的判定方法。最后以杭州市一过街通道为例，应用上述判定方法，对管棚间土体以及掌子面稳定进行计算分析，并提出合理建议，保证隧道的安全。

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	孙玉永1
	周顺华2
	肖红菊1
	王明芳1

关键词 ：隧道工程, 管棚法, 软土地层, 微拱, 掌子面稳定

Abstract：The stability of soft soil between pipe-roofs and tunnel face is the decisive factor which affects the display of pipe-roof and grating system. Firstly，the influencing factors of the formation of arch are studied. According to the Mohr-Coulomb shear strength theory，the determination method for the stability of soil between pipe-roof is derived，that is when the vault and skewback are both in steady state. Secondly，the tunnel face stability is assumed to be the three-dimensional slope stability problem under cover loads；and the determination method for the stability of tunnel face is derived and applied to an underpass in Hangzhou City to calculate the soil stability between pipe-roofs and tunnel face. The reasonable proposals are then put forward to ensure the tunnel safety.

Key words： tunnelling engineering pipe-roof method soft ground arching stability of tunnel face

引用本文:

孙玉永1，周顺华2，肖红菊1，王明芳1. 管棚法应用于软土地层的稳定性分析[J]. 岩石力学与工程学报, 2013, 32(s2): 4199-4206.
SUN Yuyong1，ZHOU Shunhua2，XIAO Hongju1，WANG Mingfang1. APPLICATION OF PIPE-ROOF METHOD TO STABILITY ANALYSIS OF SOFT GROUND. , 2013, 32(s2): 4199-4206.

链接本文:

https://rockmech.whrsm.ac.cn/CN/Y2013/V32/Is2/4199

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