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黄土地区道路陡边坡植被多样性生态防护措施

, PP. 153-158

Keywords: 环境工程,边坡防护,植物护坡,现场试验,植物多样性

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Abstract:

针对黄土地区路堑陡边坡的坡体形式,以锚杆护坡和植被根系保水固土机理为基础,结合植被多样性原理,统计分析黄土地区道路生态防护的植物种类及其植被群落组合,研究设计了适用于黄土地区陡边坡的新型土工柔性格框生态防护措施。以定西至平凉高速公路为试验依托项目,模拟分析黄土地区降雨对无防护边坡、普通植物纤维防护边坡和新型土工柔性格框植被防护边坡的冲刷,结果表明在降雨量分别为2.4m3/h和3.2m3/h的60min冲刷条件下,随着试验历时的增加,新型生态防护技术的边坡水流含沙率与累计边坡冲蚀量较其他2种边坡形式小30%以上;降雨冲刷试验结束后,前2种边坡的坡面均有不同程度的破坏,而新型生态防护技术防护的坡面比较稳定。

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