摘要
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2.4 m3/h和3.2 m3/h的60 min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。
For the steep cutting slope in loess region, based on the principles of anchor slope protection and water retention and soil-fixation by vegetation roots, combining with ecological diversity principle, the plant species and vegetation communities package for road ecological protection in the loess region are statistical analysd. A new flexible geotechnical box ecological protective measures （FGB） is designed for the steep cutting slope in the loess region. Relying on the project of Dingxi-Pingliang expressway, the rainfall erosion processes of the unprotected slope, plant fiber protective slope and FGB slop in the loess region are simulated. It is shown that （ 1 ） under the conditions of the rainfall of 2. 4 m3/h and 3.2 m3/h and each experiment last 60 min, the change of water sediment rate and accumulative erosion of FGB with the rainfalls time is above 30% smaller than that of the former two. After the end of the trial, the surfaces of the former two slopes have different degrees of damage, but the surface of FGB slope is more stable.
出处
《公路交通科技》
CAS
CSCD
北大核心
2013年第6期153-158,共6页
Journal of Highway and Transportation Research and Development
基金
交通部西部交通建设科技项目(200631881291)
交通部科技项目(200731878582)
关键词
环境工程
边坡防护
植物护坡
现场试验
植物多样性
environmental engineering
slope protection
biotechnical slope protection
field test
vegetation diversity
