喜马拉雅山区域深埋软硬互层地质条件下敞开式TBM施工方法研究

发布时间：2018-03-08 09:31

本文选题：深埋水工隧洞　切入点：TBM　出处：《隧道建设》2017年03期 　论文类型：期刊论文

【摘要】：针对敞开式TBM在深埋软硬互层围岩地质条件下遇到的技术难题,以喜马拉雅山区域某深埋水工隧洞为背景,分析了深埋软硬互层围岩地质条件下软岩对TBM掘进的影响及表现特征,提出了针对性的解决措施并成功实践。研究发现:由于岩层软硬相间变化频繁,造成软岩灾害在空间上随机分布;在大埋深高地应力洞段,软岩地层一般具有遇水崩解软化效应显著、变形快、"泥裹刀"现象严重、向外鼓胀崩解、难以出渣及塌方频发的特点,严重制约TBM快速掘进。通过实例分析总结了软硬互层围岩地质条件下顺利通过软岩的施工方法,采取分区段动态调整施工对策以适应深埋软硬互层复杂地质条件,可为国内外类似工程提供借鉴。
[Abstract]:In view of the technical difficulties encountered by open TBM under the geological conditions of deep buried soft and hard interbedded surrounding rocks, a deep buried hydraulic tunnel in the Himalayan region is taken as the background. This paper analyzes the influence and characteristics of soft rock on TBM tunneling under the geological condition of deep buried soft and hard interbedded rock mass, and puts forward some corresponding solutions and successful practice. The study finds that the change of soft and hard phases is frequent because of the frequent change of soft and hard phases in rock strata. The soft rock is distributed randomly in space, and in the section of deep and high ground stress, the soft rock stratum generally has the obvious effect of water collapse and softening, the deformation is fast, the phenomenon of "mud wrapped knife" is serious, and the swelling and collapsing outward, It is difficult to produce slag and collapse frequently, which seriously restricts the rapid excavation of TBM. The construction method of soft rock under the geological condition of soft and hard interbedded rock is analyzed and summarized by examples. The dynamic adjustment of construction measures is adopted to adapt to the complicated geological conditions of deep buried soft and hard interbeds, which can be used for reference for similar projects at home and abroad.
【作者单位】：北京振冲工程股份有限公司;中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室;
【基金】：中国科协青年人才托举工程(2015QNRC001) 国家自然科学基金资助项目(41272347)
【分类号】：U455.43

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