软岩大变形隧道施工技术对比分析

Contrastive analysis of soft rock large deformation tunnel construction technology

随着交建行业逐步向西部山区发展,软岩隧道变得越来越常见。软岩由于自身强度低,岩体结构较破碎,岩质较软,很容易发生大变形,给现场工程施工带来巨大挑战。本文通过对软岩大变形机理研究分析给出了软岩大变形的概念,对出现的常见工程施工问题和处理措施进行了总结归纳,进一步结合工程实例从超前支护、开挖方式、支护形式三方面对比Ⅰ、Ⅱ、Ⅲ级软岩大变形隧道的施工技术,对其他相似的工程施工有一定的参考价值。

With the gradual development of the construction industry to the western mountainous areas,soft rock tunnels become more and more common.Due to its low strength,fractured rock structure and soft rock quality,soft rock is prone to large deformation,which brings great challenges to field engineering construction.In this paper,the concept of large deformation of soft rock is given by studying and analyzing the large deformation mechanism of soft rock,and the common construction problems and treatment measures are summarized,further combining with engineering examples from forepole,excavation way and support form three aspects contrastⅠ,Ⅱ,Ⅲgrade soft rock large deformation tunnel construction technology,have the certain reference value for other engineering construction.