岩溶围岩分级初步探讨  

PRELIMINARY CLASSIFICATION METHOD FOR ROCK MASS SURROUNDING KARSTS

作　　者：李苍松[1] 高波[1] 王石春[2] 

机构地区：[1]西南交通大学土木学院,成都610031 [2]中铁西南科学研究院,成都610031

出　　处：《工程地质学报》2006年第6期808-814,共7页Journal of Engineering Geology

摘　　要：岩溶隧道施工中多处遇各种形态岩溶,通常应根据开挖情况对原设计围岩级别作调整,从而提出岩溶围岩级别划分问题。对岩溶围岩级别的几个基本概念进行解释,提出以“岩溶发育程度修正系数”为核心的岩溶围岩分级模型和建议标准,以武隆隧道横洞段为例进行应用探讨。实践证明,本方法分级结果与隧道施工实际基本相符。本方法因考虑了岩溶发育的可能性及岩溶形态等综合因素,是原分级方法基础上针对岩溶围岩的修正,其分级结果比较接近施工实际,但尚需大量工程实践验证。Many types of Karsts can be encountered when a tunnel in Karst ground was constructed. Generally the primary design classification of the surrounding rock mass should be revised according to the excavation condition. A classification methd for rock mass surrounding Karsts is put out in this paper. Several general conceptions about the rock classification are described. The classification standards are based on the correction coefficient of Karst de- velopment degree . The Wulong tunnel at Hengdong section is used as an example. The application shows that the classification with this method agrees well with the findings during the tunnel construction. In the method, the synthesis factors such as possibility of Karst development and Karst forms are considered. The method is the correction of the origin classification methodsthe rock surrounding Karsts. The method still needs to be verified in the future practice, examined.

关 键 词：岩溶 隧道 围岩分级 修正系数 岩溶发育程度 

分 类 号：P642.25[天文地球—工程地质学]