当前世界的筑坝趋势以土石坝居多,无论是坝高或坝体方量都随着施工机械化水平的提高而获得较大发展。筑坝条件也产生了新的概念,如高山峡谷区,洪水流量大的河流上,修建土石坝,仍然是比较经济的坝型,施工也很方便;而且可以利用开挖岸边溢洪道和导流隧洞所得土石方填筑坝体,一举两得。 In the current world, the tendency of damming is mostly earth and rock dam, and both dam height and dam volume have been greatly improved with the construction mechanization level. Dam conditions have also created new concepts, such as mountain valleys and flood-prone rivers, the construction of earth-rock dams, which are still relatively economical dams and are easy to construct and can be used for excavation of shore spillways and diversions The earth obtained from the tunnel will fill the dam and serve two purposes.