稻秸秆泥皮护坡材料对路基水分迁移影响的初步研究

发布时间：2018-06-08 19:45

本文选题：公路路基 + 稻秸秆泥皮　；参考：《中国水土保持科学》2017年02期

【摘要】：为研究晴雨天气下,稻秸秆泥皮护坡材料对路基水分迁移的影响,在测定该材料渗透系数和干湿循环抗渗性能基础上,进行室内路堤边坡模拟试验,分别在连续的自然照射和坡面冲刷条件下,测定路基内部含水量变化,以此分析稻秸秆泥皮护坡材料在极端干旱和连续降雨条件下,对路基内部水分迁移特征的影响。结果表明:稻秸秆泥皮材料渗透系数较小,干湿循环不会导致其抗渗性能明显降低;该材料能有效避免坡面泥皮结构失水干裂,减少干旱天气下,路基内部水分向外过度蒸发迁移,保证路基含水量稳定,坡面植被发育后,保水防裂作用更加明显;该材料具备较强的水分隔阻能力,有效减少强降雨期间的坡面雨水入渗及水分进一步向路基内部扩散迁移,同时有效促进植被生长,泥皮+稻秸秆+草根复合泥皮结构,能进一步提高坡面抗雨水冲蚀性能,形成可靠的边坡生态防护系统。该研究对公路路基设计与施工具有重要的指导意义。
[Abstract]:In order to study the effect of rice straw mud skin slope protection material on the water migration of Subgrade under the clear rain weather. On the basis of measuring the permeability coefficient of the material and the anti seepage performance of dry and wet cycle, the indoor embankment slope simulation test was carried out. Under the condition of continuous natural irradiation and slope erosion, the change of water content in the subgrade was determined, and the rice straw was analyzed. The results show that the permeability coefficient of the rice straw mashed material is small and the dry and wet cycle will not lead to the decrease of its permeability. The material can effectively avoid the water loss and dry cracking of the mud crust in the slope, and reduce the internal water in the subgrade under the dry weather. The water content of the subgrade is stable and the water content of the subgrade is stable. After the vegetation is developed, the water preservation and anti cracking effect of the slope is more obvious. The material has strong water barrier ability, effectively reduces the infiltration of the slope surface and the diffusion of water to the subgrade, and effectively promotes the growth of the vegetation, and the mud skin + rice straw + grass. The composite mud skin structure can further improve the erosion resistance of the slope, and form a reliable ecological protection system for slope. This study has important guiding significance for the design and construction of highway subgrade.
【作者单位】：长沙理工大学土木与建筑学院;广西交通科学研究院有限公司;
【基金】：国家自然科学基金“路基土的水分扩散和冷凝迁移及路基软化机理研究”(51178063),“生态防护边坡的雨水入渗及其对植被根系固土防滑作用的影响机理研究”(51578082) 广西交通科学研究院科技项目“类植物根系有机坡面防护技术研究”(KJ2014-014)
【分类号】：U416.1

【参考文献】