發(fā)布時(shí)間：2018-04-18 13:52

  本文選題：橋墩 + 冰塞��； 參考：《水利學(xué)報(bào)》2017年05期

【摘要】：天然河道中,橋墩的存在改變了局部水流特性,對冰塞形成及演變產(chǎn)生影響。通過模型試驗(yàn),研究了橋墩存在及橋墩位置不同時(shí)對冰塞演變過程的影響,試驗(yàn)結(jié)果表明:橋墩的存在改變了橋墩附近的水流結(jié)構(gòu),使得橋墩附近水流輸冰能力相對增大,冰塞厚度減小;相比于將橋墩安置在兩彎連接直道段,將橋墩安置于彎道頂點(diǎn)處時(shí),橋墩附近水流輸冰能力增大;在兩彎連接的直道段和彎道頂點(diǎn)處同時(shí)放置橋墩時(shí),彎道平衡冰塞厚度介于單墩放置于兩彎連接的直道段與單墩放置于彎道頂點(diǎn)處時(shí)的彎道平衡冰塞厚度之間。
[Abstract]:In natural river, the existence of piers changes the local flow characteristics and influences the formation and evolution of ice jams.The influence of the existence of piers and the location of piers on the evolution of ice slugs is studied through model tests. The experimental results show that the existence of piers changes the flow structure near the piers and makes the ice transport capacity near the piers relatively larger.The thickness of ice plug decreases; compared with placing the piers in the straight section of the two bends, the capacity of ice transportation near the pier increases when the piers are placed at the top of the bend, and when the piers are placed at both the straight section of the bridge and the top of the bend at the same time,The thickness of the equilibrium ice plug is between the thickness of the single pier placed in the straight section of the connection between the two bends and the thickness of the equilibrium ice plug of the bend when the single pier is placed at the top of the bend.
【作者單位】： 合肥工業(yè)大學(xué)土木與水利工程學(xué)院;
【基金】：國家自然科學(xué)基金資助項(xiàng)目(51379054)
【分類號(hào)】：U446.1

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