南水北调中线工程河北省磁县段强膨胀岩（土）地质结构研究

Middle Route of South-to-North Water Transfer Project in Ci County, Hebei Province, Strong Expansive Rock （Soil） Study on Geological Structure

河北省磁县段广泛分布的上第三系中新统（N1）地层，其中强膨胀岩（土）对南水北调中线工程造成了很大影响。详细介绍了强膨胀岩（土）的宏观及微观地质结构，分析了其基本地质结构成因，以及裂隙面强度特征，并由此引起的滑坡现象，对其形成机理做了深入的分析阐述。

In Ci County, Hebei province wide distribution Miocene of Neogene （N1） formation, Which strong expansive rock （soil） had a great impact on Middle Route of South-to-North Water Transfer Project. This article details the strong expansion of rock （soil） of macro-and microgeological structures,Basic geological structure analysis of its causes and strength characteristics of fractured surface, And resulting landslide phenomena, In-depth analysis on the formation mechanism of its elaboration.