从当前世界的筑坝趋势来看,最近修建的大坝以土石坝居多。这是因为许多国家计划建坝的坝址,很难得到坚硬的基岩。修建土石坝,便于就地取材,可使用自行式机械施工,往往能节约投资并提高质量。坝型的选定,在枢纽工程中起着决定性的作用。它不仅决定大坝本身的投资问题,而且对坝区布置也有影响,故应从各个角度判断决定。此外,当然应该特别重视大坝的安全。即使有一种关于筑坝的新概念在理论上证实是可行的,仍应分期实践逐步验证,以期安全。对过去轻信不成熟的技术,引起事故的实例我们 Judging from the trend of damming in the world at present, the dam built recently is dominated by earth-rock dams. This is because many countries plan to build dam sites, it is difficult to get hard bedrock. Construction of earth-rock dams for easy access to materials on site and the use of self-propelled mechanical construction often result in savings and increased quality. Dam-type selection, plays a decisive role in the hub project. It not only determines the investment of the dam itself, but also affects the layout of the dam. Therefore, the decision should be judged from all angles. In addition, of course, special attention should be paid to dam safety. Even though there is a new concept of dam construction that is theoretically proven to be viable, phased validation of step-by-step practices should be undertaken for safety reasons. We are an example of the technology that caused immature immature trust in the past