Wave Height Transformation and Set-up Between a A Submerged Permeable Breakwater and A Seawall     

蔡清标  余建弘  陈鸿彬  陈信佑 《海洋工程》2012,(1):167-176

In this study, we investigated wave transformation and wave set-up between a submerged permeable breakwater and a seawall. Modified time-dependent mild-slope equations, which involve parameters of the porous medium, were used to calculate the wave height transformation and the mean water level change around a submerged breakwater. The numerical solution is verified with experimental data. The simulated results show that modulations of the wave profile and wave set-up are clearly observed between the submerged breakwater and the seawall. In contrast to cases without a seawall, the node or pseudo-node of wave height evolution can be found between the submerged breakwater and the seawall. Higher wave set-up occurs if the nodal or pseudo-nodal point appears near the submerged breakwater. We also examined the influence of the porosity and friction factor of the submerged permeable breakwater on wave transformation and set-up.  相似文献   

大型堆载条件下桩土性状的试验研究   总被引：3，自引：0，他引：3  

吴文  黄亚凡 《岩土力学》1998,19(3):65-71

叙述了堆载条件下桩的受力特性和沉降特征。根据实测资料,分析了桩侧摩阻力和端承力随上部堆载的变化关系,并由此研究了大型堆载条件下的桩土性状。对堆载试验结果的可靠性进行了论证。  相似文献   

1998年长江流域洪涝灾害分析   总被引：9，自引：3，他引：6  

李吉顺  王昂生 《气候与环境研究》1998,3(4):390-397

在分析１９９８年长江流域特大洪涝灾害基本情况的基础上,探讨了这次灾害的成因,特别是研究了湖南省洪涝灾害加重与区域性强降雨过程时间变化的关系。指出近年来强降雨过程集中的时段有从５～６月份向７～８月份推移的趋势,造成与上游洪水顶托的机会增多,长江中下游洪涝灾害加重,特别是自８０年代中期以来,这种现象的持续出现,应有更深层次气候变化方面的原因。  相似文献   

碳酸盐岩化学溶蚀效应   总被引：8，自引：0，他引：8  

宋焕荣  黄尚瑜 《现代地质》1993,7(3):363-371

本文根据大量模拟试验成果和野外观察资料,重点讨论了碳酸溶蚀效应、硫酸溶蚀效应以及几种混合液包括碳酸或硫酸加NaCl,MgCl₂及CaCl₂等对碳酸盐岩的混合溶蚀作用,并根据硫酸水溶蚀叠加于碳酸水溶蚀作用的研究,首次提出了碳酸盐岩叠加溶蚀效应的概念,指出由于叠加溶蚀效应的存在,使硫酸溶蚀明显较碳酸溶蚀强烈。  相似文献   

大吨位堆载法对单桩承载力试验的影响     

袁从华  章光 《岩土力学》1997,18(1):78-83

大吨位堆载法对单桩承载力试验结果存在四个方面的影响，分别对它们进行了理论分析，并对它们的影响程度进行了评估。  相似文献   

Wave height transformation and set-up between a submerged permeable breakwater and a seawall     

蔡清标  余建弘  陈鸿彬  陈信佑 《中国海洋工程》2012,26(1):167-176

In this study,we investigated wave transformation and wave set-up between a submerged permeable breakwater and a seawall.Modified time-dependent mild-slope equations,which involve parameters of the porous medium,were used to calculate the wave height transformation and the mean water level change around a submerged breakwater.The numerical solution is verified with experimental data.The simulated results show that modulations of the wave profile and wave set-up are clearly observed between the submerged breakwater and the seawall.In contrast to cases without a seawall,the node or pseudo-node of wave height evolution can be found between the submerged breakwater and the seawall.Higher wave set-up occurs if the nodal or pseudo-nodal point appears near the submerged breakwater.We also examined the influence of the porosity and friction factor of the submerged permeable breakwater on wave transformation and set-up.  相似文献