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水利水电工程建设的地质条件中,要涉及到工程地区的区域稳定以及地基稳定、边坡稳定、地下硐室围岩稳定等有关问题,其中区域稳定是其它各项的先决条件。而地震是引起区域稳定突然变化的因素。以我国一些地区的土坝为例,1970年1月云南通海地震,在烈度为七至十度区内,73座土坝中发
Among the geological conditions of water conservancy and hydropower project construction, it involves the regional stability of the project area, the stability of the foundation, the stability of the slope and the stability of the surrounding rock of the underground chamber. Among them, the regional stability is the precondition of other items. However, the earthquake is the cause of the sudden and steady change in the region. Taking the earth dam in some areas of our country as an example, in January 1970, the Tonghai earthquake in Yunnan Province, in a zone of intensity of seven to ten degrees, with 73 earth dam