双丰隧道第三系砂泥岩地层涌水涌泥原因分析及处理措施

发布时间：2018-05-08 18:15

本文选题：铁路隧道 + 处理措施　；参考：《铁道建筑》2017年03期

【摘要】：针对牡绥线双丰隧道穿越第三系砂泥岩的涌水涌泥问题,通过专项勘察、超前地质预报及室内试验、原位试验等方法,研究了涌水涌泥段的地质构造、水文地质情况及第三系砂泥岩的工程特性,并分析了第三系砂泥岩地层的失稳模式和涌水涌泥机理。结果表明:受开挖扰动地下水大量渗入,致使砂泥岩结构破坏并失稳;拱顶支护不足以支撑砂泥混合物与抗拒动、静水压力而产生变形,最终在薄弱处发生涌水涌泥。采用超前注浆加固及锚杆支护、泄水减压、三台阶临时仰拱+中立柱支护等措施治理后效果良好,双丰隧道得以在涌水涌泥段安全贯通。
[Abstract]:Aiming at the problem of water gushing through Tertiary sandstone and mudstone in Shuangfeng Tunnel of Musui Line, the geological structure of gushing mud section is studied by means of special investigation, advanced geological forecast, laboratory test and in-situ test, etc. The hydrogeological conditions and the engineering characteristics of the third system sand and mudstone are analyzed, and the instability model of the Tertiary sandstone and mudstone formation and the mechanism of water gushing are analyzed. The results show that a large amount of disturbed groundwater infiltration results in the destruction and instability of sand and mudstone structure, and the arch support is not enough to support the mixture of sand and mud and resist movement, and the hydrostatic pressure causes deformation, and finally water gushing occurs in the weak place. Measures such as advance grouting reinforcement and bolt support, water discharge and decompression, and three steps temporary inverted arch column support have good effect after treatment, and Shuangfeng tunnel can be safely penetrated in the water gushing and mud gushing section.
【作者单位】：兰州交通大学土木工程学院;哈牡铁路客运专线有限责任公司;铁道第三勘察设计院集团有限公司;中铁十九局集团有限公司;甘肃省轨道交通力学应用工程实验室;
【基金】：中国铁路总公司科技研究开发计划(2013G011-B) 铁道部科技研究开发计划(2009G009-B-02) 长江学者和创新团队发展计划(IRT1139)
【分类号】：U453.61

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