| 波浪溢流作用下海堤内坡高性能加筋草皮护坡防侵蚀特征研究 |
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| 引用本文： | 潘 毅,张同鑫,周子骏,陈永平.波浪溢流作用下海堤内坡高性能加筋草皮护坡防侵蚀特征研究[J].海洋工程,2019,37(1):29-36. |
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| 作者姓名： | 潘 毅 张同鑫 周子骏 陈永平 |
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| 作者单位： | 河海大学水文水资源与水利工程科学国家重点实验室;河海大学港口海岸与近海工程学院 |
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| 基金项目： | 江苏省自然科学基金面上项目(BK20181309);河海大学中央高校基本科研业务费项目(2018B43514) |
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| 摘 要： | 基于1∶1的大型水槽试验结果,分析了波浪溢流过程中位于海堤内坡的高性能加筋草皮护面的侵蚀特征。试验观察表明试验期间有一定土壤的损失,但护坡无明显的破坏;土面高度测量表明,当土壤流失发展到一定深度后,如果水动力强度变化不大,侵蚀趋于逐渐停止,这种现象称为侵蚀上限;结合试验现象对侵蚀上限进行了初步解释,并讨论了侵蚀上限达到前的侵蚀速率特征;植株密度监测表明,试验期间的草茎密度基本不变,草叶密度在开始几次试验期间持续减小,而后达到一个稳定值,这对于海堤的可持续防护有重要意义。研究成果能够为波浪溢流期间海堤内坡防御的相关研究和工程措施提供参考依据。
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| 关 键 词： | 波浪溢流 海堤 内坡 高性能加筋草皮 土壤侵蚀 植被损失 侵蚀速率 |
Erosion feature of vegetated HPTRM system on landside slope of a levee during combined wave and surge overtopping |
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| PAN Yi,ZHANG Tongxin,ZHOU Zijun and CHEN Yongping.Erosion feature of vegetated HPTRM system on landside slope of a levee during combined wave and surge overtopping[J].Ocean Engineering,2019,37(1):29-36. |
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| Authors: | PAN Yi ZHANG Tongxin ZHOU Zijun and CHEN Yongping |
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| Institution: | State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China;
College of Harbor, Coastal and Offshore Engineering, Hohai University, Nanjing 210098, China,State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China;
College of Harbor, Coastal and Offshore Engineering, Hohai University, Nanjing 210098, China,State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China;
College of Harbor, Coastal and Offshore Engineering, Hohai University, Nanjing 210098, China and State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China;
College of Harbor, Coastal and Offshore Engineering, Hohai University, Nanjing 210098, China |
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| Abstract: | Based on the results of full-scale flume tests, the erosion characteristics of vegetation enhanced by high performance turf reinforcement mat ( HPTRM) on the landside slope of a levee under the combined wave and surge overtopping are analyzed. Observation during the tests shows that there is a certain loss of soil, but generally there is no obvious damage or failure. The measurement of the soil erosion indicates that after a certain depth, the erosion tends to gradually stop as if the hydrodynamic intensity does not change much. This phenomenon is called the upper limit of erosion. The mechanism of the upper limit of erosion is explained with the test observation and the erosion rate characteristics before the upper limit is discussed. The plant density monitoring shows that the density of grass stems remained basically unchanged, while the density of grass risers decreased continuously during the first several tests, and then reached a stable value, which is of great significance for the sustainable protection of the levee. The research results can provide a reference for relevant researches and engineering measures of the protection of landside slope of levees during combined wave and surge overtopping. |
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| Keywords: | combined wave and surge overtopping levee landside slope HPTRM soil erosion vegetation loss erosion rate |
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