坝工混凝土耐久寿命的现状和问题

Present situation of dam concrete's lifetime in world and existing problems in China

阐述了坝工混凝土及其建筑物寿命的现状 ,指出国外坝工界认为混凝土坝的耐久寿命至少为 10 0 a,而我国混凝土坝的平均寿命为 3 0～ 5 0 a,2 1世纪我国将要付出高昂代价去加固修复病坝、危坝。美国胡佛大坝是 2 0世纪十大建筑物之一 ,是世界长寿名坝。提出我国的巨型混凝土坝设计 ,应当把胡佛大坝作为“样板坝”。

This article represents the present situation of service life of the dam concrete in the world and in China,and the problems in this respect to which crucial attention must be paid.As one of the criteria in design of a concrete dam,the service life should be considered.The international construction world considered that the durable lift of a concrete dam should be at least 100 years. Through investigation,the authors figure that the average lifetime of the concrete dams in China is about 30-50 years.It is estimated that China will spend much money on the repair and reinforcement of the deteriorated dams in the 21st century. The Hoover Dam of U.S.A,one of the ten greatest buildings in the 20th century,is a famous long life dam in the world.The giant dams in China should take Hoover Dam as an example.