摘要
三峡工程明渠截流拟提前至 2 0 0 2年 11月下半月进行 ,截流设计流量 10 30 0m3 /s,截流落差 4.0m ,合龙能量指标高达 40 4MW ,为葛洲坝截流的 2 .6倍 ,是巴西伊泰普工程截流的 1.4倍 ,居当今世界截流工程之最。明渠截流上、下游龙口宽为 15 0m和 14 0m ,抛投量分别为 2 0 .4万m3 和 2 0 .5万m3 。明渠截流及三期碾压混凝土围堰施工强度高、难度大、且为背水一战 ,为三峡工程建设中的重大难题之一。主要阐述明渠截流及三期碾压混凝土围堰设计关键技术问题研究成果 。
The open diversion channel closure of TGP is to be conducted ahead of schedule in latter half of November,2002.The design discharge for the closure is 10 300 m\+3/s,with closure drop of 4.0 m.The energy index for the closure is of 404 MW and respectively 2.6 and 1.4 times of those of Gezhouba and Itaipu projects,being the highest among river closures ever conducted in the world.The upstream and downstream closure gaps of the open channel are 150 m and 140 m wide respectively,and the rockfills to be dumped are 204 and 205 thousand m\+3.The high intensity and difficulties in the construction of the open channel closure and Stage Ⅲ roller compacted concrete cofferdam are major problems in the construction of TGP.This paper presents the major research achievements on key technical issues in the design of open channel closure and Stage Ⅲ roller compacted concrete cofferdam and puts forward countermeasures.
出处
《人民长江》
北大核心
2002年第1期7-9,33,共4页
Yangtze River
关键词
明渠
截流
土石围堰
三峡水利枢纽
设计
design
open channel closure
earth-rock cofferdam
key technology
TGP
