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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

ISSN号：1003-1995
期刊名称：《铁道建筑》
时间：0
分类：U457.2[建筑科学—桥梁与隧道工程;交通运输工程—道路与铁道工程]
作者机构：[1]兰州交通大学土木工程学院,甘肃兰州730070, [2]哈牡铁路客运专线有限责任公司,黑龙江哈尔滨150050, [3]铁道第三勘察设计院集团有限公司,天津300252, [4]中铁十九局集团有限公司,北京100176, [5]甘肃省轨道交通力学应用工程实验室,甘肃兰州730070
相关基金：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）

作者：朱尚明[1], 徐大臻[2], 马志富[3], 杨宝旭[4], 李德武[1,5]

关键词：铁路隧道, 处理措施, 试验研究, 第三系砂泥岩, 涌水涌泥, 成因分析, 施工技术, Railway tunnel, Treatment measure, Experimental study, Tertiary sand-mudstone, Gushing watermud , Cause analysis , Construction technique

中文摘要：

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。

英文摘要：

Gushing water mud in the tertiary sand-mudstone stratum around the Shuangfeng tunnel on MUSUl hne is an engineering problem. The geological structure and hydrogeology condition at the gushing water mud section, and engineering characteristic of the tertiary sand-mudstone stratum were studied through specific survey, advanced geological prediction,lab test and in-situ test. The instability mode and the mechanism of the gushing water mud of the tertiary sand-mudstone stratum were studied. The results show that the significant penetration of underground water due to excavation disturbance may result in the damage of sand-mudstone stratum structure and the lack of stability. The vault supporting is not appropriate for the mixture of sand and mud, and the static and dynamic water stress, and it deforms accordingly. Eventually, gushing water mud occurs at the weakest point. There are some effective measures including pre-grouting and rock bolting, discharge decompression, three steps of temporary inverted arch plus center pillar. In this way, the gushing water mud problem around Shuangfeng tunnel was solved.

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