铁道标准设计Issue(2)：28-32,33,6.DOI:10.13238/j.issn.1004-2954.2016.02.006
支沟堰塞湖溃决引发主河洪水计算方法研究
Research on Calculation of Main River Flood Triggered by Tributary Dammed Lake Outburst
摘要
Abstract
Outburst flood of tributary moraine dammed lakes is a new risk and the railway and highway construction have never dealt with it. In addition, Tibetan river channels have complex shapes with different widths and the error is too big when peak flattening method is used directly to calculate outburst flood. Based on the flume experiment, we find that when the tributary flood flows into the main river it is shunted and diffused, and the local resistance loss increases because of the flow disturbance when the flood arrives at the sudden contraction section in the channel;and the flow and peak water level attenuate significantly in that two sections. The Lee Stevan formula and Xie Renzhi formula are modified for the attenuation, and attenuation coefficients are added to original formulas to apply to complex situations of flood calculation. Midui moraine lake outburst illustrates that the modified formulas have higher accuracy and can be used for rapid assessment of outburst flood risk, which matches the accuracy requirements of the principle scheme of the railway line selection.关键词
支沟溃决洪水/水槽实验/修正公式/折减系数Key words
Outburst flood in tributary/Flume experiment/Modified formula/Attenuation coefficient分类
建筑与水利引用本文复制引用
张云成,姚令侃,李致勇..支沟堰塞湖溃决引发主河洪水计算方法研究[J].铁道标准设计,2016,(2):28-32,33,6.基金项目
中国铁路总公司科技研究开发计划课题(2013G014-A-3、2014G004-A-6) （2013G014-A-3、2014G004-A-6）
国家自然科学基金重点项目(41030742) （41030742）
