钻爆法和TBM两种不同施工方法下深埋高外水压力隧洞的破坏特点及其力学机制分析

发布时间：2018-08-30 15:52

【摘要】：钻爆法和TBM法是地下工程掘进的两种主要方法,其对围岩扰动程度、加固措施有显著影响。文章以四条平行分布且分别采用TBM法和钻爆法掘进的大型隧洞为研究对象,进行同一地质条件下不同开挖方法对围岩破坏的影响研究。通过大量地质资料的统计处理、力学分析,总结了围岩的破坏方式,并归纳对比两种不同施工方法对围岩影响的共性特征,包括破坏部位相同、破坏面积相近、破坏坑深相近。另外,对比了两种方法对围岩影响的差异性,包括TBM施工时二次破坏范围比钻爆法的二次破坏范围大,并且易于产生岩爆和应力型破坏,但钻爆法施工时岩体易发生结构面型破坏。在此基础上,分析了各种破坏现象的力学机制,研究成果可为同类工程的施工和加固提供参考。
[Abstract]:Drilling and blasting method and TBM method are two main methods of underground engineering excavation, which have significant influence on the disturbance degree of surrounding rock and reinforcement measures. In this paper, the influence of different excavation methods on surrounding rock failure under the same geological conditions is studied by taking four large tunnels with parallel distribution and driven by TBM method and drilling blasting method as research objects. Through the statistical treatment and mechanical analysis of a large number of geological data, the failure mode of surrounding rock is summarized, and the common characteristics of the influence of two different construction methods on surrounding rock are summarized and compared, including the same damage site, similar damage area and close damage pit depth. In addition, the difference of the influence of the two methods on the surrounding rock is compared. The second failure range of TBM construction is larger than that of drilling blasting method, and it is easy to produce rockburst and stress type failure. However, the rock mass is prone to structural failure during drilling and blasting construction. On this basis, the mechanical mechanism of various failure phenomena is analyzed, and the research results can provide a reference for the construction and reinforcement of similar projects.
【作者单位】：成都理工大学地质灾害防治与地质环境保护国家重点实验室;中国电建集团华东勘测设计研究院有限公司;
【基金】：国家自然科学基金(51308082,51208069) 四川省教育厅基金(15ZA0075)
【分类号】：U451;U455.4

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