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第三系泥质弱胶结富水粉细砂岩隧道主要技术措施研究

DOI: 10.3969/j.issn.1674-0696.2015.04.07, PP. 39-44

Keywords: 隧道工程,第三系,泥质弱胶结,富水,粉细砂岩,围岩特性,水平旋喷,tunnelengineering,thethirdseries,argillaceousweakcementation,richwater,finesandstone,surroundingrockfeatures,horizontaljet

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Abstract:

:？为解决兰渝铁路、宁夏王洼铁路在建设过程中所遇到的第三系泥质弱胶结富水粉细砂岩所带来的系列工程问题，结合桃树坪、胡麻岭、程儿山等隧道建设中的工程难点和科研攻关，系统阐述了第三系泥质弱胶结富水粉细砂岩的围岩特性，介绍了适应该围岩的主要辅助技术措施和工程方案，提出了针对该地层的设计措施和施工关键技术。确定采用以“重降水、密导管、强支护、辅注浆、快挖快支快封闭”为主的工程原则，必要时洞内水平旋喷加固，摸索出一整套此类地层条件下隧道的施工方法，并成功的应用于工程实践中，解决了一个世界罕遇的工程难题。

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