| 金塘大桥桥轴线优化及建桥对水流和航道的影响 |
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| 引用本文： | 熊绍隆,韩海骞,黄世昌,娄海峰,张舒羽,耿兆铨.金塘大桥桥轴线优化及建桥对水流和航道的影响[J].海洋学研究,2009,27(2):58-63. |
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| 作者姓名： | 熊绍隆 韩海骞 黄世昌 娄海峰 张舒羽 耿兆铨 |
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| 作者单位： | 浙江省水利河口研究院,浙江,杭州,310020 |
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| 摘 要： | 金塘大桥跨越灰鳖洋,连接金塘岛沥港镇与宁波镇海新泓口,全长18.5 km,为舟山连岛工程的主体.该大桥工程所在海域潮汐为非正规浅海半日潮,历年最大潮差为3.67 m,多年平均潮差为1.91 m;潮流呈往复流特征,且基本平行于峡道走向.金塘大桥水域东侧微冲,西侧微淤,深泓摆幅较小,深槽稳定.在海床演变分析的基础上,运用数学模型进行了桥轴线的优化,由实体定床与动床模型探讨了建桥对水动力的影响.数学模型选用2002年3月和11月实测水文测验资料对模型进行率定和验证.物理模型选取中值粒径为0.2 mm的塑料沙作为动床试验的模型沙,选用2002年11月实测水文测验资料对定床模型进行验证,选用2002年11月和2003年4月两次水下地形资料对动床模型进行河床冲淤验证,验证精度均满足相关规范要求.研究结果表明,以推荐的方案建桥对桥位近区的潮位、流速与潮量的影响均较小.建桥后,下游高潮位有所抬高,上游高潮位有所降低;上游低潮位有所抬高,下游低潮位略有降低.由于桥墩的阻水作用,使该桥所在海域海流流速整体上略有减小,减小量一般在5%以内;桥墩间因海流集中使流速有所增加.建桥使主航道航深有所增加,桥位近区与远区分别冲刷0.6～0.8 m和0.1～0.2 m;西航道桥轴线近区冲刷0.4～0.5 m,远区淤积0.1～0.2 m.建桥对甬江口、金塘锚地、七里屿锚地均无明显的不良影响,对北仑港区基本没有影响.
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| 关 键 词： | 金塘大桥 水动力 宁波港 |
Optimization of the Jintang Bridge's axis and the influence of the bridge on the water flow and navigation channel |
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| XIONG Shao-long,HAN Hai-qian,HUANG Shi-chang,LOU Hai-feng,ZHANG Shu-yu,GENG Zhao-quan.Optimization of the Jintang Bridge''s axis and the influence of the bridge on the water flow and navigation channel[J].Journal of Marine Sciences,2009,27(2):58-63. |
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| Authors: | XIONG Shao-long HAN Hai-qian HUANG Shi-chang LOU Hai-feng ZHANG Shu-yu GENG Zhao-quan |
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| Institution: | XIONG Shao-long,HAN Hai-qian,HUANG Shi-chang,LOU Hai-feng,ZHANG Shu-yu,GENG Zhao-quan(Zhejiang Institute of Hydraulics , Estuary,Hangzhou 310020,China) |
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| Abstract: | The Jintang Major Bridge from Ligang,Jintang Island to Xinhongkou,Zhenhai is 18.5 km in length and it is the main body to link islands of Zhoushan Archipelago.The tide in the project area is shallow sea irregular semidiurnal tide with annual-mean and maximum tidal range of 1.91m and 3.67 m respectively.The tidal current is of reversing characteristics running parallel to the flume.There are micro-deposition on the west and micro-erosion on the east of the bridge and the deep channel is stable with small osc... |
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| Keywords: | Jintang Major Bridge hydrodynamics Ningbogang Bay |
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