摘要
为了深入研究大尺度河流涉水桥梁桥墩局部地形演变特征和趋势,基于1992年和2012年武汉长江大桥桥墩区域地形资料,分析了桥墩局部河床年内及年际间的演变规律。结果表明,年内变化规律表现为冲刷坑位置转移,冲坑由汛期的桥墩正后方转向非汛期的桥墩两侧,冲坑面积增大,但深度减小,墩周其他局部位置淤积;年际变化表现为冲刷坑深度增加,且面积有所增大,但增幅有限,整体来看,桥墩周围地形年际间冲淤变化幅度不大,基本维持平衡。
In order to study the evolution characteristics and trend of local topography near the piers of a large scaled river-crossing bridge, the laws of annual and inter-annual local river bed evolution are analyzed on the basis of the topography data observed in 1992 and 2012 of Wuhan Yangtze River Bridge. The results show that for the annual evolution, the position of scour pit changes from right behind a pier in flood season to the sides of the pier in non-flood season, so the pit area increases but the depth decreases, and deposition occurs in other zones around the pier;for the inter-annual evolution, the scour pit is deepened and its area increases to a limited degree. The inter-annual erosion and deposition amplitude in local area near the piers is not large and keeps in balance basically.
出处
《人民长江》
北大核心
2014年第16期91-93,105,共4页
Yangtze River
关键词
桥墩
局部冲刷
河床演变
武汉长江大桥
bridge pier
local erosion
river bed evolution
Wuhan Yangtze River Bridge
