羊老蹄水库库坝区软弱夹层的工程地质特征

Characteristics of Engineering Geology of Soft Interbedded Layer In Dam and Reservoir Area of Yanglaoti Reservior

本文论述了西龙池抽水蓄能电站（１２０ 万 Ｋ Ｗ） 羊老蹄上水库泥灰岩软弱夹层的产状及矿物组成和化学成分，通过平硐揭露及野外原位变形试验和室内中型剪试验，论证了泥灰岩软弱夹层抗风化能力低及物理力学性质差，具有崩解、软化和泥化等工程地质特征，对水库库坝区岸坡稳定有一定影响。

The formation and composition of mineral material and chemistry for the soft interbedded layer of marl in dam area of Yanglaoti Upper Reservoir are introduced. Its characteristics on engineering geology such as low resistance to weathering, poor physical and mechanical feature,crumbling, softening, and mudding are illustrated.The conchusion is that the soft interbedded layer has influence on bank stability of dam and reservoir area of Yanglaoti Upper Reservoir.