复杂隧道围岩安全性及其评价方法

doi:10.13722/j.cnki.jrme.2015.1737

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摘要在对国内外现行隧道围岩分级方法分析的基础上，指出了其在隧道工程设计和安全性控制，尤其是复杂围岩控制设计方面存在的突出问题，认为现行的隧道围岩分级概念模糊，难以适应复杂多变的地层条件和较为严苛的环境控制要求，尤其是对稳定性较差的复杂围岩条件缺乏有效的指导作用。从隧道围岩控制的宗旨出发，提出了隧道围岩及其支护系统安全性的概念，明确了其科学内涵和表征方法；重点对于不具备自稳能力的复杂围岩安全性进行了研究，建立了隧道围岩安全性的分析模型，提出了隧道围岩安全性分析中应考虑围岩预加固效果的必要性及其评价方法；基于隧道围岩尺度效应和地层结构效应(时间效应)的分析，建立了围岩尺度响应的表述方法，同时从细观结构层面分析了不同地层结构形式对安全性的影响关系；结合“支护–围岩”动态作用关系的分析，建立了极不稳定地层条件下复杂隧道围岩安全性的评价指标体系，将围岩超前变形、超前破坏和地层加固有效性作为核心评价指标，形成了包括9项基础指标的评价体系，并提出了安全性的分级方法。最后介绍了隧道围岩安全性的分级方案的工程应用。

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	张顶立
	台启民
	房倩

关键词 ：隧道工程, 隧道围岩, 安全性, 评价方法, 安全性分级, 指标体系

Abstract：The prominent issues in tunnel design and safety control，especially the design of tunnel in complex surrounding rock are highlighted based on the analysis of existing classification methods of rock. The existing methods of rock classification are unsuitable for the complex rock conditions and strict requirements of environmental control. Moreover，they provide little guidance for tunneling in complex conditions. In this paper，the concept of safety of surrounding rock and support system of tunnel is proposed based on the surrounding rock control. The safety of tunnelling in complex surrounding rock with limited self-stability is studied. The safety evaluation model of surrounding rock is proposed. The importance of ground pre-reinforcement in weak ground tunneling is illustrated and the analysis method considering the effects of ground pre-reinforcement is proposed. The relationship between the scale of surrounding rock and its response is established based on the analysis of the scale effect and the structure effect(time effect) of surrounding rock. Meanwhile，the factors that affect the tunnelling stability are analyzed in the mesoscopic level. The safety evaluation system of surrounding rock under complex geological conditions is established based on the analysis of the relationship between surrounding rock and tunnel support. The deformation ahead of tunnel face，the failure zone ahead of tunnel face and the effectiveness of ground reinforcement are taken as the key parameters to classify the tunnel safety in complex conditions. An evaluation system of tunnel safety composed of nine indices is therefore put forward. A project is also given to introduce the use of the proposed classification method of tunnel safety.

Key words： tunnelling engineering')" href="#">

tunnelling engineering tunnel surrounding rock safety evaluation method safety classification index system

引用本文:

张顶立，台启民，房倩. 复杂隧道围岩安全性及其评价方法[J]. 岩石力学与工程学报, 2017, 36(2): 270-296.
ZHANG Dingli，TAI Qimin，FANG Qian. Safety of complex surrounding rock of tunnels and related evaluation method. , 2017, 36(2): 270-296.

链接本文:

http://www.rockmech.org/CN/10.13722/j.cnki.jrme.2015.1737 或 http://www.rockmech.org/CN/Y2017/V36/I2/270

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