黄河公伯峡水电站右岸坝基古风化岩的工程地质特性初探

Preliminary Study on Engineering Geology Characteristics of Paleo-weathered Rock in the Right Bank Dam Foundation of Gongboxia Hydropower Station on the Yellow River

公伯峡水电站是黄河上游拟建的一座大型电站。其右岸坝基附近第三系湖相地层下普遍掩埋有厚簿不一的古风化层。本文对这一岩层的特性作了研究。指出:在封闭的天然状态下能满足次要的和附属建筑基础(不包括全风化层)承载能力的要求。但有可能产生不均匀沉陷,应作适当处理。

Gongboxia hydropower station is one of the largest power stations planned for construction in upper reaches of the Yellow River. Paleo-weathered rock was widely discovered under the rock bed of lake facies in the area of the right bank dam foundation. Study on the characteristics of the said rock has been made and concluded that the paleo-weathered rock (completely weathered rock is not included can be used according to its carrying capacity as foundation for the secondary and auxilliary structures under the conditions when the rock is confined in the natural conditions, but measures must be taken towards uneven foundation settlement.