HAN Jianqiao,DUAN Wenzhong.Influence of Bridge Building on River Flood Control in Narrow Reaches—A Case Study of Xianyang Reaches in Weihe River[J].Research of Soil and Water Conservation,2017,24(06):388-391.
卡口河段桥梁建设对河道行洪的影响——以渭河咸阳段为例
- Title:
- Influence of Bridge Building on River Flood Control in Narrow Reaches—A Case Study of Xianyang Reaches in Weihe River
- 分类号:
- TV131.4
- 摘要:
- 河流束窄处断面窄深，形成河道水沙输移的卡口，该区域行洪能力相对较弱，桥梁建设更加威胁河道防洪安全。以陇海铁路咸阳渭河桥改扩建工程为例，采用平面二维水流数学模型，研究了不同工程方案在3种洪水频率下对河道行洪的影响特征，结果表明：在桥梁建设期，四桥并存引起桥位处水位壅高值最大；疏浚量大的工程方案建设后过水面积增大更多，桥位水位降低幅度也相对较大，如工况1建设后300年一遇、100年一遇、5年一遇洪水下分别降低0.9 m，0.9 m，0.6 m；卡口河段的桥梁建设宜结合适当的疏浚工程，以增加行洪河宽及过水面积，平顺水流，提升河道行洪能力。
- Abstract:
- The bottle-neck reaches is the narrow part of the river. In the bottle-neck reaches, the flood carrying capacity is relatively weak and the bridges built here threaten to the flood control safety. Taking Weihe Bridge of Longhai railway in Xianyang, the influence of bridge building on the flood control safety is studied. The results show that coexistence of 4 bridges leads to the maximum water level increase during the construction period. The project with maximum dredging volume leads to the increase of flow area and the maximum water level decrease. After Project 1, the water level decreases during the 300 year return period, 100 year return period and 5 year return period are 0.9 m, 0.9 m and 0.6 m, respectively. The bridges built in the bottle-neck reaches should combine the dredging projects to increase the flood carrying width and flow area and increase the flood carrying capacity.
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备注/Memo
收稿日期:2016-10-08;改回日期:2016-11-21。
基金项目:西北农林科技大学博士科研启动基金“黄土丘陵沟壑区治沟造地工程对水系平衡的影响”（2452015337）
作者简介:韩剑桥(1987-),男,河南禹州人,博士,助理研究员,主要从事河流数值模拟等方面研究。E-mail:hjq13@163.com