一种稻秸杆泥皮护坡材料及抗冲刷试验研究

发布时间：2018-02-28 18:45

本文关键词： 道路工程稻秸秆泥皮降雨冲刷试验研究生态防护　出处：《公路交通科技》2017年01期 　论文类型：期刊论文

【摘要】：基于土质边坡的雨水冲刷及生态防护的根系护坡原理,提出了一种基于稻秸秆泥皮护坡新方法。采用物理力学试验方法,研究了稻秸加筋对泥皮性质的影响,分析了稻秸杆添加前后泥皮的干密度、渗透性、崩解性、干缩抗裂性等参数变化。在此基础上,对采用稻秸杆泥皮护坡材料的边坡进行了室内强降雨冲刷模拟试验,通过对比分析裸坡、纯泥皮护坡、稻秸杆泥皮护坡冲刷试验的结果,研究了稻秸秆泥皮护坡的抗冲刷效果;通过对不同稻秸杆含量配比、不同稻秸杆长度、不同含水量稻秸杆泥皮护坡材料的试验,研究了该材料抗冲刷性能影响因素。结果表明:稻秸杆泥皮材料具有干密度大、抗渗能力强、抗崩解和抗干缩开裂效果明显等特性;稻秸杆泥皮护坡能显著提高路基边坡的抗强降雨冲刷能力,最经济合理的配比指标为稻秸秆含量20 kg/m3左右,长度7.5~10 cm,泥皮含水量18%左右抗冲刷能力最强。
[Abstract]:Based on the principle of Rain Water erosion and ecological protection of soil slope, a new method of slope protection based on rice straw mud skin was put forward. The effect of reinforced rice straw on the properties of soil was studied by using physical and mechanical test method. The changes of dry density, permeability, disintegration, dry shrinkage and crack resistance of mud skin before and after adding rice straw were analyzed. By comparing and analyzing the results of scour test of bare slope, pure mud cover slope, and rice straw mud skin slope protection, the scour resistance effect of rice straw mud skin slope protection was studied, and the different ratio of rice straw content, the different rice straw length, the different rice straw content ratio, the different rice straw length, the different rice straw content ratio, the different rice straw straw length, The factors affecting the scour resistance of different moisture content rice straw mud cover materials were studied. The results showed that the rice straw mud skin materials had the characteristics of high dry density, strong impermeability, obvious anti-disintegration and anti-dry shrinkage cracking effects. The slope protection of rice straw can significantly improve the ability of strong rainfall erosion resistance of roadbed slope. The most economical and reasonable ratio index is about 20 kg/m3 of rice straw content, 7.5 ~ 10 cm in length and 18% cm in water content.
【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;
【基金】：国家自然科学基金项目(51178063,51578082) 广西交通科学研究院科技项目(KJ2014-014)
【分类号】：TU43

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