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一、Ⅲ号钢管安装过程中受洪水破坏情况 1978年6月,正值乌江汛期,安装至641.6米高程的Ⅲ号钢管,由于大坝溢流,被洪水冲坏六节,如图1所示。乌江渡水电站为坝内式钢管,施工方案确定,钢管随坝体上升而安装,不予留混凝土槽。Ⅲ号钢管位于大坝第8坝段中心线,78年6月安装至第33节即锥形收缩管段以上五节,钢管所在仓面8坝四仓混凝土已浇至641.6米高程,8坝段挡水面混凝土已浇至660.2米高程,汛前6、7坝段迎水面已浇至657米高程。施工导流布置确定6、7坝段为78年汛期泄洪口。六月十九日四时,洪水开始过坝。过坝最
First, the No. Ⅲ steel pipe installation by the flood damage June 1978, coincided with the Wujiang flood season, installed to 641.6 meters elevation of No. Ⅲ steel pipe, due to the overflow of the dam, was destroyed by the flood of six, as shown in Figure 1 . Wujiangdu Hydropower Station is a type of steel pipe inside the dam, the construction program is confirmed, and the steel pipe is to be installed as the dam rises. Concrete tanks will not be allowed to stay. Ⅲ pipe is located in the center of the eighth dam dam center, in June 78 installed in section 33 of the cone contraction section of the above five sections, the steel pipe where the dam 8 four concrete positions have been poured to 641.6 m elevation 8 dam Water retaining surface concrete has been poured to 660.2 meters elevation, before the flood season 6,7 dam facing water has been poured to 657 meters elevation. Construction diversion arrangement to determine 6,7 dam section for 78 flood season spillway. At four o’clock on June 19, the flood started to pass the dam. Dam the most