Risk assessment of water inrush in karst shallow tunnel with stable surface water supply: Case study

IF 2.5 3区 工程技术 Q2 ENGINEERING, CIVIL
Zengguang Xu, Meiting Xian, Xiaofeng Li, Wei Zhou, Jiaming Wang, Yaping Wang, J. Chai
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引用次数: 5

Abstract

Water inrush generally has a serious impact on karst shallow tunnel construction. Because of in situ fault fracture zone, high degree of weathering and poor quality of rock mass,. karst shallow tunnel would therefore face high risk of water inrush from surface during the disturbance of construction. In addition, the greater the surface water flow would contribute higher probability of water inrush under the same disaster-causing environment. However, existing research has paid less attention to the influence of surface water flow on faults or fissures water inrush. In this study, a risk assessment system of water inrush in karst shallow tunnel with stable surface water supply was firstly proposed on basis of Qinling Water Conveyance Tunnel and the Yuelongmen Tunnel in China. Each indicator was quantified and classified into four risk levels by the attribute mathematics theory and analytic hierarchy process, the degree of confidence criterion was then applied to identify the risk level of the water inrush. The evaluation results were finally verified by actual scenario on site to confirm the validity of this risk assessment system in karst shallow tunnel with stable surface water supply. Accordingly, the proposed method could be popularized and applied in future tunnel projects, because it could provide safe construction reference for karst shallow overburden tunnel with stable surface water supply.
地表供水稳定的岩溶浅埋隧道突水风险评价——以实例为例
突水一般对岩溶浅埋隧道施工造成严重影响。由于原地断裂破碎带,风化程度高,岩体质量差。因此,在施工扰动过程中,岩溶浅埋隧道将面临地表突水的高风险。此外,在相同的致灾环境下,地表水流越大,突水概率越大。然而,现有研究较少关注地表水流对断层或裂隙突水的影响。本文以秦岭输水隧道和岳龙门隧道为例,首次提出了地表水供应稳定的岩溶浅埋隧道突水风险评价体系。利用属性数学理论和层次分析法对各指标进行量化,划分为4个风险等级,并应用置信度准则对突水风险等级进行识别。最后通过现场实际场景对评价结果进行验证,验证了该风险评价体系在地表水稳定的岩溶浅埋隧道中的有效性。因此,该方法可在今后的隧道工程中推广应用,为地表供水稳定的岩溶浅覆盖隧道的安全施工提供参考。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Geomechanics and Engineering
Geomechanics and Engineering ENGINEERING, CIVIL-ENGINEERING, GEOLOGICAL
CiteScore
5.20
自引率
25.00%
发文量
0
审稿时长
>12 weeks
期刊介绍: The Geomechanics and Engineering aims at opening an easy access to the valuable source of information and providing an excellent publication channel for the global community of researchers in the geomechanics and its applications. Typical subjects covered by the journal include: - Analytical, computational, and experimental multiscale and interaction mechanics- Computational and Theoretical Geomechnics- Foundations- Tunneling- Earth Structures- Site Characterization- Soil-Structure Interactions
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