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汕头港外拦门沙是制约该港进一步发展的主要障碍,在对工程海域环境泥沙论证基础上,进一步对工程泥沙问题进行论证和预报,如拦门沙整治后的演变趋,开挖航道的回淤和导流 沙功效等。工程实施期间及完工后进行多年的现场跟踪观测表明,各项工程泥沙问题的预报均获得良好的印证,本文还介绍了外拉门沙整治技术方面的经验,包括运用单导堤改变工程海域水沙营运动力局和泥沙输移方向,导堤的长度和高度,沿堤流和顶冲流的整治,航道工 相似文献
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粘性泥沙运动规律在淤泥质海岸工程中的应用 总被引：3，自引：0，他引：3
根据近年来我国淤泥质海岸粘性泥沙运动规律在海岸工程中的应用:包括对于适航水深的应用,在疏浚技术上的应用,关于航道泥沙回淤模式和计算方法的应用,关于在泥沙物理模型和数学模型上的应用以及在泥沙回淤整治技术上的应用.阐述和论证了学术成果与工程应用的有效结合,同时也突显了学术和基础研究在工程建设中的作用和价值. 相似文献
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Silting in the Lower Courses of Tidal Sluices in China 总被引：2，自引：0，他引：2
Serious sediment deposition often occurs after the construction of tidal sluices in snrall or medium-sized tidal muddy estuaries, so desilting or dredging is needed to meet the demands of flood diseharge, saltwater retaining, and navigation in those areas. In this paper, the problem of sediment deposition induced by construction of tidal sluices is analyzed.Different problems of silting near tidal sluices for different types of estuaries are summed up. at the same time, corresponding methods are given to solve these probleras, and a few successful examples are also given. The idea of comprehensive regulation and utilization of estuaries is put forward, and some proposals for solution of sediment deposition in this kind of estuaries are made. 相似文献
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Effect of Development of Caofeidian Harbor Area in Bohai Bay on Hydrodynamic Sediment Environment 总被引：4，自引：1，他引：3
Based on the characteristics of waves, tidal currents, sediment and seabed evolution in the Caofeidian sea area in the Bohai Bay, a 2D sediment mathematical model of waves and tidal currents is employed to study the development schemes of the harbor. Verification of spring and neap tidal currents and sediment in the winter and summer of 2006 shows that the calculated values of tidal stages as well as flow velocities, flow directions and sediment concentration of 15 synchronous vertical lines are in good agreement with the measured data. Also, deposition and erosion of the sea area in front of Caofeidian ore terminal induced by suspended load under tidal currents and waves are verified; it shows that the calculated values of depth of deposition and erosion as well as their distribution are close to the measured data. Furthermore, effects of reclamation scheme of island in front of the land behind Caofeidian harbor on the hydrodynamic environment are studied, including changes of flow velocities in the deep channels at the south side of Caofeidian foreland and Laolonggou and in various harbor basins, as well as changes of deposition and erosion of seabed induced by the project. 相似文献
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通过对现场测量资料和淤泥流变特性试验结果的分析,研究了可航容重的特性并探讨了粘性颗粒粒度含量对可航容重的影响,提出了汕头港外航道适航水深的应用技术指标。应用情况表明适航水深的研究取得所期望的功效。 相似文献
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波浪作用下海上墩式建筑物周围局部冲刷的试验研究 总被引：3，自引：1，他引：3
本文主要是通过试验研究和分析手段，对波动场的海上墩式建筑物周围的冲刷机理、冲刷形态进行探讨，对最大冲刷深度及其发生位置提出满足近海工程需要的预报公式，最后对动床模型律进行探讨。 相似文献
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粘性泥沙在盐水中冲刷和沉降特性的试验研究 总被引：2，自引：1，他引：2
本文根据絮凝电化学理论,探讨了淤积物浓度对粘性泥沙起动切应力的影响,获得起动切应力τc与淤积物浓度S的相关式τ_o=KS~(2·33) 该公式得到众多试验资料的证实。冲刷试验表明,具有均匀容重的底床在不同水流切力下,冲刷率随时间基本成直线变化,自养密实底床的冲刷率随时间呈指数曲线变化。试验结果还表明均匀容重底床的冲刷率与水流流速近似成四次方关系,论文运用了窦国仁博士从能量原理获得的床面泥沙动密实系数概念,获得冲刷率的表达式为 E=(K_0)/(C_0~2)-(γsγ)/(γs-γ)(V-V_c)V~3/gdω 相似文献
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