摘要
麦秆纤维作为一种天然的加筋材料,可以显著提高土体的力学性能,且具有造价低廉、可降解等特性。为了研究麦秆纤维加筋土的坡面防护效果及其适应性,文章根据黄土公路边坡降雨侵蚀特征,进行了人工模拟降雨冲刷试验。结果表明:麦秆纤维加筋土的防护效果显著,最大冲蚀降低率达到了40%以上;麦秆纤维加筋土防护的边坡在第1次降雨时的平均冲蚀降低率为23.72%,第2次降雨时达到了30.45%,提高了约1.5倍,说明麦秆纤维加筋土防护对连续性强降雨有较好的适应性;麦秆纤维加筋土主要通过提高坡面土体的抗剪强度、降低坡面土体的渗透性能来提高坡面的抗冲刷性能。
Wheat straw is a natural reinforced material, which can significantly improve the mechanical properties of soil, and has characteristics of low cost, biodegradability, etc. For studying the protec- tive effect and the adaptability of reinforced soil with wheat straw, based on the erosion characteristics of rainfall in loess highway slope, the artificial simulated rainfall comparison tests were conducted. The results show that the protective effect of reinforced soil with wheat straw is significant, the maxi- mum of erosion decreasing ratio reaches more than 40 %; the average erosion decreasing ratio of the slope with the protection of reinforced soil with wheat straw is 23.72% during the first rainfall, and it reaches 30.45% during the second rainfall which is about 1.5 times to that during the first rainfall, indicating that the protection of reinforced soil with wheat straw has better adaptability against the continuous heavy rainfall; the reinforced soil with wheat straw primarily increases the anti-eroding a- bility of slope by increasing the shear strength and reducing the permeability of surface soil.
出处
《合肥工业大学学报（自然科学版）》
CAS
CSCD
北大核心
2016年第12期1671-1675,共5页
Journal of Hefei University of Technology：Natural Science
基金
国家自然科学基金面上资助项目(41272285)
中央高校基本科研业务费专项资金资助项目(2013G2211003
2014G2260009)
黄土地区公路建设与养护技术交通行业重点实验室开发课题基金资助项目(KLTCR-Y12-5)
关键词
黄土公路边坡
降雨
冲刷
麦秆纤维
对比试验
loess highway slope
rainfall
erosion
wheat Straw
comparison test
