Brief Discussion on Construction Technology of Curtain Grouting in Xiaowan Dam

The curtain grouting is widely used in the seepage control for a dam base and river levee,which is different in construction technology.The design of curtain grouting in Xiaowan Hydropower Station of Yunnan is discussed here in detail,including the working conditions,the distribution of the grout holes,the construction technology and process,the construction process of the single hole,the boring washing,the water pressure test before grouting,the checking for the grouting quality and so on.The analysis results indicate that for this kind of dam base,the construction technology should be evaluated first,and furthmore the special measures should be adopted.It is showed from the sound wave tests that the grouting makes the cracks between the rock masses filled effectively,and makes the compactness of the rock masses strengthened,so as to prove that the effect of curtain grouting in Xiaowan dam could meet the requirements of the design.