摘要
大化水电站二期导流工程截流前，导流明渠基本堵塞，靠人力及机械清淤无法按时实现截流。经过分析研究，采用主河槽预抛方案提高上游水位，使导流明渠水流速由１．０ｍ／ｓ逐渐增大到３．２５ｍ／ｓ，在１７天内冲走２５．２万ｍ３淤积泥砂，实现了按计划截流。
The amount of sediment in the diversion channel of Dahua hydropower station reached 252 000 m3 which almost blocked up the channel before the second stage of river-damming of diversion construction. Clearing away the sediment by manpower and machine could not realize the riverdamming in a planned way. The employ of throw stones in advance to main river led scheme raisedthe water level of upper reaches and increased the waterflow velocity of diversion channel from1. 0 m/s to 3. 25 m/s, which resulted in the sluicing away of 252 000 m3 sediment within 17 days.Thus damming the river was achieved in a planned way.
出处
《广西科学》
CAS
1995年第2期67-73,共7页
Guangxi Sciences
关键词
大化水电站
起动流速
导流明渠
泥沙运动
冲淤
Dahua hydropower station
incipient velocity
diversion channel
sediment motion
sluicing sediment.
