吉林台电站混凝土面板坝周边缝自愈型止水结构

Research on self-healing waterstop of perimeter joint of Jilintai-I CFRD

吉林台面板坝坝高157m,采用9度地震烈度设计,止水结构的自愈性是止水设计中重点考虑的问题。该坝为国际上首次在表层止水结构中采用膨胀型柔性填料的工程。根据研究论证,GBW膨胀型柔性填料具备较强的自愈能力熏且自愈后可抵抗2MPa以上的水压力作用不漏水,可以满足吉林台接缝自愈止水的需要。根据该坝自愈性止水的主要研究结果,提出了其周边缝止水结构形式。

Jilintai-I CFRD is 157 m high and designed under 6 degrees of earthquake intensity. The self-healing property was of major concern in its waterstop design. The water expanding plastic filler was adopted firstly in the world for the top waterstop defense. According to experiment result, the self-healing property of GBW plastic filler is obvious and the structure after self-healing can bear the water pressure of more than 2 MPa,which can meet the requirement of Jilintai-I CFRD. The main results of the experiment are given along with the self-healing waterstop of the perimeter joint.