景洪水电站主厂房右侧紧邻右冲沙底孔，右冲沙底孔作为二期纵向围堰的组成部分，在主厂房开挖前已经形成。
In order to ensure the excavation of sediment discharge bottom outlet at right side and foundation of the power house dam section, the blasting method was used in Jinghong power station.
趾板基础开挖分两期进行，一期为一般开挖，二期为岩石开挖。
The plinth foundation excavation work was divided by two stages the first one was ordinary excavation, the second one was rock excavation.
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