摘要
试验研究了透水丁坝附近河床的冲淤特性,绘制了这一区域的等高线图,分别对不同透水率的透水丁坝附近河床冲淤后的纵向断面、横向断面以及坝轴断面各点高程变化进行了比较.结果表明,透水丁坝的最大冲刷深度小于不透水丁坝,但其下游侧有冲刷槽,其深度从坝根到坝头差距不大,且该冲槽宽度随透水率的增大而增大;透水丁坝对河床的有效影响长度比同样坝长的不透水丁坝略长,最大淤积高程则更高,透水率为30%时的影响长度最大.说明透水丁坝在自身防护和保护范围两方面均优于不透水丁坝.
Based on an experiment, the local scour and silting characteristics near the permeable spur are studied preliminarily, an actual measured geographical map of this district is drawn, and the maps of the permeable spur with different pervious rates are compared in this thesis, especially in cross-section, lengthwise direction section and the section of permeable spur axial line. By this way, the experiment＇s result is analyzed. It is shown that the scour depth of the permeable spur is less than that of the solid spur. But there is a scour ditch in the downstream side. Its depth is approximately equal from the permeable spur＇s root to the head, and its width increases with the increase of the pervious rate. The influence district of the permeable spur is little longer than that of the solid spur, and the silting altitude of the permeable spur is higher, and when the pervious rate is 30% , the length of the influence district is the longest. The result of this experiment study can be summarized： both the self-prevention and conservation extents of the permeable spur are better than those of the solid spur, and the local scour and silting characteristics in this study can offer reference to further researches on permeable spurs.
出处
《水利水运工程学报》
CSCD
北大核心
2008年第1期57-60,共4页
Hydro-Science and Engineering
基金
石河子大学科学技术研究发展计划资助项目(ZRKX200719)
关键词
透水丁坝
透水率
冲刷
淤积
permeable spur
pervious rate
scour
silting
