近距多座并行桥梁墩前壅水研究

发布时间：2019-07-08 14:29

【摘要】：为了研究近距多座并行桥梁的壅水规律,在分析了单座桥梁的壅水规律后,类比应用到2座并行桥梁壅水的研究中且得到相应的规律,然后基于这些成果可达到研究目的。研究结果表明,如果被动影响桥梁位于主动影响桥梁的下游,则主动影响桥梁的壅水除了受自身阻水影响外,还要附加上被动影响桥梁的壅水对其带来的正影响作用;反之,则会受到被动影响桥梁的壅水对其带来的负影响,且影响系数都会随着两桥的桥间距增大而减小。假设并行桥梁的壅水仅仅两两影响时会形成修正壅水,且该修正壅水对其它桥梁产生重复的2次影响后会无限接近真实壅水。在这个前提下,总结出多桥并行时各桥壅水的经验公式。
文内图片：

图片说明：渠道及拟建桥梁布置图
[Abstract]:In order to study the backwater law of several parallel bridges at close distance, after analyzing the backwater law of a single bridge, the analogy is applied to the study of backwater of two parallel bridges and the corresponding law is obtained, and then the research purpose can be achieved based on these results. The results show that if the passive influence bridge is located in the downstream of the active influence bridge, the backwater of the active influence bridge is not only affected by its own water resistance, but also has a positive effect on it by the backwater of the passive influence bridge, on the contrary, it will be negatively affected by the backwater of the passive influence bridge, and the influence coefficient will decrease with the increase of the bridge distance between the two bridges. It is assumed that the backwater of the parallel bridge will form modified backwater when the backwater of the parallel bridge is only pairwise, and the modified backwater will be infinitely close to the real backwater after the repeated two effects of the modified backwater on other bridges. On this premise, the empirical formula of backwater of each bridge is summarized when the multi-bridge is parallel.
【作者单位】：武汉大学水资源与水电工程科学国家重点实验室;武汉大学污淤泥研究中心;湖北水利水电科学研究院;
【基金】：国家自然科学基金资助项目(51109167) 国家科技重大专项课题资助(2014ZX07104005)
【分类号】：U442.33

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