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一、概况近年来,随着土力学理论和试验技术的进步、对筑坝材料要求的放宽和加工处理能力的提高、筑坝技术和施工机械的发展,筑坝速度的加快和造价的降低,以及适于修建混凝土坝的坝址逐步减少等等,国外的土石坝特别是高土石坝迅速发展。据统计,在国外已建的高100m以上的大坝中,土石坝所占的比例,由1968年以前的31—38％,增加到1975年以后的62％以上。如:美国,1984年在建的43座高63m
I. Overview In recent years, with the progress of soil mechanics theory and test technology, the relaxation of dam material requirements and the improvement of processing and handling capacity, the development of dam construction technology and construction machinery, the acceleration of dam construction and the reduction of construction cost, As well as the dam sites suitable for the construction of concrete dams and so on. The overseas earth-rock dams, especially those with high earth-rock dams, have developed rapidly. According to statistics, among dams of over 100m in height built abroad, the proportion of earth-rock dams increased from 31-38% before 1968 to more than 62% after 1975. Such as: the United States, built in 1984, 43 high 63m