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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

第14卷    第1期    总第82期    2017年1月

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文章编号:1672-7029(2017)01-0110-07
层状炭质页岩隧道底鼓机理分析
腾俊洋1,2,唐建新1, 2

(1.重庆大学 煤矿灾害动力学与控制国家重点实验室,重庆 400044;2.重庆大学 资源及环境科学学院,重庆 400044)

摘 要: 为分析重庆某高速公路隧道穿越层状炭质页岩段底鼓机理,采用现场调查、室内实验的方法调查分析仰拱质量,隧道底板赋水情况,炭质页岩隧道围岩强度,遇水软化性、膨胀性及地下水对仰拱混凝土的腐蚀性。建立了Flac3d数值模型进一步分析围岩压力和地下水压力作用下隧道围岩位移场、应力场和渗流场分布情况。研究结果表明,该炭质页岩隧道底鼓是隧道围岩强度低、地下水对围岩的软化和水压力作用以及炭质页岩的流变等综合因素所产生的。

 

关键字: 炭质页岩;隧道;底鼓;数值分析

Mechanism analysis of floor heave in layered carbonaceous shale tunnel
TENG Junyang1,2, TANG Jianxin1,2

1. State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China; 2. College of Resources and Environmental Sciences, Chongqing University, Chongqing 400044,China

Abstract:The invert quality, tunnel floor water bearing condition, the rock strength of carbonaceous shale tunnel, water softening and expansion and the corrosive groundwater of the inverted arch concrete have been investigated and tested through field investigation and laboratory experiment method to analysis the mechanism of floor heave in a layered carbonaceous shale highway tunnel in Chongqing. A Flac3d numerical model has been built for the further analysis of the distribution of tunnel surrounding rock displacement, stress and seepage under the action of surrounding rock pressure and water pressure. The results show that the carbon shale tunnel floor heave is the result of the comprehensive effect of low strength of tunnel surrounding rock , rock softening , water pressure and the carbonaceous shale rheological.

 

Key words: carbonaceous shale; tunnel;floor heave;numerical analysis

ISSN 1672-7029
CN 43-1423/U

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