混凝土面板堆石坝接缝止水技术的新进展

New advance on the joint watertight techniques of CFRD

经过近20年的发展,我国混凝土面板堆石坝面板接缝止水从结构、材料到施工技术都有了长足的发展。其中,已被国内大多数高坝采用的新型止水结构,针对吉林台工程提出的膨胀填料自愈性止水结构,为确保嵌填密实研制的柔性填料挤出机等技术,在洪家渡、吉林台、公伯峡等工程中的应用均取得了令人满意的效果。新近发布的电力标准DL/T5215—2005和DL/T949—2005部分反映了这些新进展情况。

The technical state of CFRD in China has being greatly improved over the last two decades, which are introduced in this paper. The improvement lies in the new perimetric waterstop structure （including the self-healing structure of Jilintai CFRD）, waterstop materials and construction techniques （including the screw extruder for the joint sealant filler paving work in Gongboxia CFRD）, adopted in most of the high CFRI） in China and enjoys satisfactory result. The Chinese Electric Power Standard of waterstop （DIJF 5215-2005） and joint plastic sealant （DL/T 949-2005） of hydraulic structure summarize these new developments to some extent.