光照水电站大坝基础处理设计探讨

摘要

The carrying capacity of foundation and the seepage control of curtains in left and right banks are important part of the design of dam foundation treatment of the RCC gravity dam in Guangzhao Hydropower Station. Combined with the actual situation, the innovative design ideas are proposed to accelerate the construction of dam, including carried out consolidation grouting of dam foundation between two compacted layer construction, determining foundation rock conditions by using two criteria of the permeability ratio of grouting hole not more than 1 Lu achieved by simple water pressure test before grouting and the grout consumption of grouted hole not more than 40 kg/m, and increasing the depth of grouting holes in some area. These innovative design ideas have accelerated the speed and improved the quality of dam construction.%光照日水电站碾压混凝土重力坝坝基的承载能力及两岸帷幕的防渗能力是大坝基础处理设计的重要环节。结合现场实际情况，提出利用碾压升层间隙进行施工，采用灌前简易压水试验透水率小于1 Lu孔段和已灌孔吸浆量单耗不大于40 kg/m这2个标准对坝基岩石条件进行判定，适当增加灌浆段段长等创新设计思路，提高了工程的施工速度，保证了施工质量。