| 引用本文: | 张维杰,韩仲凯,崔 魁,等.建闸后河道行洪对上游铁路桥安全运行影响研究[J].灌溉排水学报,2023,42(S1):219-222. |
| ZHANG Weijie,HAN Zhongkai,CUI Kui,et al.建闸后河道行洪对上游铁路桥安全运行影响研究[J].灌溉排水学报,2023,42(S1):219-222. |
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| 摘要: |
| 利用HEC-RAS模型，计算分析了下游拦河闸建设后，河道行洪时，闸门在全开、无法开启及溃决3种不同运行工况下，上游铁路桥桥址处河道水位、流量、流速的变化情况，进而计算出各工况下桥址处冲刷深度。结果表明，与建闸前相比，建闸后上游桥址处水位均有一定程度升高，其中闸门无法开启时水位升高最大，较建闸前升高10.7%；闸门溃决时，桥址处最大流量增加11.34%，最大平均流速增加11.11%，河槽和河滩部位最大冲刷深度均有增加，但都在允许冲刷深度范围内，拦河闸不会对上游铁路桥安全运行产生不利影响。研究成果可对河道类似工程安全运行提供借鉴和参考。 |
| 关键词: HEC-RAS模型；拦河闸；铁路桥；冲刷深度 |
| DOI：10.13522/j.cnki.ggps. 2023360 |
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| Study on the Influence of River Sluice on the Safety Operation on Railway Bridge in the Upstream |
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ZHANG Weijie, HAN Zhongkai, CUI Kui, AN Kaijun
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Water Resources Research Institute of Shandong Province, Jinan 250013, China
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| Abstract: |
| Based on the HEC-RAS model, the changes of water level, water flow and flow velocity at the upstream railway bridge site were calculated and analyzed under the conditions of gate fully-open, closed and collapsed. and Then the scour depth at the bridge site under each condition was calculated. The results showed that, compared to before the construction of the gate, the water level at the upstream bridge site increased after the gate was built, with the highest water level increased occurring when the gate cannot be opened, which was 10.7% higher than before the gate was built. When the gate breaking, the maximum water flow at the bridge site increases by 11.34%, the maximum average velocity increased by 11.11%, and the maximum scour depth of the river channel and beach increases, but it is allowable. The river sluice will not adversely affect the safe operation of the upstream railway bridge. The research results have great reference significance for similar engineering analysis. |
| Key words: HEC-RAS model; river sluice; railway bridge; scouring depth |
