| 宝兰客运专线麦积山隧道2号斜井突涌水特征与防治措施研究 |
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| 作者单位： | ;1.中铁第一勘察设计院集团有限公司 |
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| 摘 要： | 铁路隧道大突涌水灾害一般认为发生于岩溶发育及断层构造带等易形成大型含水构造的地段,通过对宝兰客运专线麦积山隧道2号斜井的研究分析,普遍认为是工程地质及水文地质条件相对较好、富水性相对较弱的花岗岩隧道中的突涌水现象。并在勘察施工过程中运用地质调查法、物探法、超前水平钻法等多种勘察手段,结合区域背景资料综合分析,总结出花岗岩的构造节理定向等距、空间分布非均匀性、涌水量非线性变化、流态相对单一等特点及发育规律,并以此结论为基础论述突涌水防治措施方案的比选研究。最后施工验证了治理方案"顶水作业,辅助注浆封堵"的安全合理性。
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| 关 键 词： | 铁路隧道 隧道突涌水 花岗岩 构造裂隙水 含导水构造设计 |
Study on Characteristics and Control Measures of Water Burst of No.2 Deviated Well in Maijishan Tunnel on Bao- Lan Passenger Dedicated Line |
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| Institution: | ,The First Railway Survey and Design Institute Group Co.,Ltd. |
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| Abstract: | Railway tunnel water burst often occurs in karst development section and fault tectonic belt.With reference to Maijishan Tunnel on Baoji- Lanzhou High-speed Railway,this paper discusses the water burst in granite tunnel with good engineering geological and hydrogeological conditions and weak water yield property. Geological investigation method, geophysical inspection method, advanced horizontal directional drilling method are employed during the survey and construction processes,and the characteristics and development rules of granite, such as directional isometry of tectonic joint,heterogeneity of spatial distribution,non-linear variation of water inflow are summarized in combination with regional background information. Based on this,the author conducts detailed comparison and analysis of water burst treatment schemes and the safety and rationality of the selected treatment scheme of operating under water and auxiliary blockage by grouting are verified by engineering practices |
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| Keywords: | Railway tunnel Water burst of tunnel Granite Tectonic fissure water Water-bearing structure |
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