摘要
首次提出了上、下水垫深度的概念.以射流理论为基础推导了上、下水垫深度与双股入水水舌的水力要素之间的关系,指出了这两个水垫深度可用来划分拱坝水垫塘底板上最大动水压力区(“1+1=1”、“1+1>1”和“1+1<1”区).结合小湾电站水垫塘的实验成果,给出了可用来迅速求解上、下水垫深度的图表.分析结果表明,当小湾电站水垫塘内水深为37.87m时,中孔水舌入水的较优间距为13.3~40.5m,与实验所得的13~17.
The concepts of upper depth and lower depth of water cushion are proposed for the first time. The relations between these two depths and the hydraulic factors of the two jets are derived from jet theory. It is pointed out that these two depths could be used to divide different areas of maximum water pressure on the pool bottom (that is :“1+1=1”, “1+1>1”, and “1+1<1” area). By used of the experimental data of Xiaowan project, a set of diagrams are given from which the two depths can be obtained easily. As for Xiaowan project, the reasonable distance of two water jets from the middle outlets in “1+1<1” area is from 13 3m to 40 5m for the depth of water cushion of 37 87m, which agrees with the data 13~17 5m to 40~49m obtained in the experiment.
出处
《河海大学学报(自然科学版)》
CAS
CSCD
1997年第1期30-36,共7页
Journal of Hohai University(Natural Sciences)
基金
国家"八五"科技攻关项目
关键词
拱坝
水垫塘
水舌间距
射流理论
消能池
arch dam
water cushion pool
water jet distance
jet theory
upper depth of water cushion
lower depth of water cushion