草皮护坡水力糙率实验研究
首发时间:2006-05-16
摘要:生态护岸工程可以在保护河岸的同时对河道生态系统起到良好的维护作用,其中草本植物又是生态护岸的重要工程材料。但是目前对于草本植物与水流之间相互作用的认识还很模糊,尤其是采用草皮护岸后对于原有河岸的糙率改变情况缺乏系统的研究。为此,本次草皮护坡糙率实验对36组草皮试件的糙率进行了系统的实验研究。研究表明,草皮糙率的大致范围为0.020~0.090,主要与土壤类型、肥沃程度等有关。草皮糙率随生长期的增加而增大,基土中设置了加筋材料的草皮糙率较天然草皮的糙率更大。
关键词: 草皮护坡 糙率 土壤类型 生长期 三维加筋网 实验研究
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Experimental Research on Hydraulic roughness of Revetment with Grass Cover
Abstract: Ecological revetment engineering can protect river ecosystem health well. So it has been used widely in the channel revetment. The flexible vegetation is a main kind of engineering materials in the ecological revetment engineering, because it grows quickly and is easy to be planted and constructed. However, the interrelation between the flexible vegetation and the flow is undetermined, and the systemic study is laggard. In this case, 36 samples of turf and reinforced turf were measured carefully in the experiment about vegetation’s hydraulic roughness. The experiment proves that the range of the hydraulic roughness of turf used in revetment is from 0.020 to 0.090; the hydraulic roughness of turf is related to the different categories of soil; with the period of growth increasing, the hydraulic roughness of flexible vegetation will increase and the reinforcement materials can improve the hydraulic roughness of turf remarkably.
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No.6630581651147749****
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