彭丽云, 刘铭杰, 刘德欣,,等.麦秸秆防腐技术和效果评价及其对粉土抗剪强度的影响[J].河南理工大学学报（自然科学版）,2021,40(4):171-177.

PENG L Y, LIU M J, LIU D X, et al.Anti-corrosion effect evaluation of wheat straw and its influence on shearstrength of silt[J].Journal of Henan Polytechnic University(Natural Science) ,2021,40(4):171-177.

麦秸秆防腐技术和效果评价及其对粉土抗剪强度的影响

彭丽云, 刘铭杰, 刘德欣, 朱同宇

北京建筑大学 土木与交通工程学院，北京100044

摘要:为了研究土壤中麦秸秆易被腐蚀的问题和麦秸秆加筋对粉土抗剪强度的影响，以聚乙烯醇溶液为防腐剂对麦秸秆防腐进行试验，并对麦秸秆加筋粉土进行直剪试验。结果表明：聚乙烯醇溶液质量分数为10%时，麦秸秆浸泡时间4 d防腐效果最佳；天然麦秸秆的极限拉力随浸水时间增长而降低，浸水4 d，极限拉力降低了 28.05% ；聚乙烯醇溶液防腐处理对秸秆的极限拉力有很大提升作用，最大增幅在浸泡防腐剂4 d时，达到22.6% ；埋入土中的防腐麦秸秆在自然条件下经过降雨模拟，不同时间测得的极限拉力与防腐处理后的麦秸秆差别不大，聚乙烯醇防腐效果良好；防腐后的麦秸秆加筋可以提高粉土的抗剪强度，对黏聚力的提升作用较内摩擦角显著，黏聚力与内摩擦角最大提升幅度分别为63.6%与6.8% ；麦秸秆加筋粉土最优加筋率为0.6%，此时对强度的提升作用最大。

关键词:麦秸秆防腐;秸秆加筋;抗剪强度;聚乙烯醇;极限拉力

doi:10.16186/j.cnki.1673-9787.2020020050

基金项目:国家自然科学基金资助项目（41772291）

收稿日期:2020/02/22

修回日期:2020/04/17

出版日期:2021/07/15

Anti-corrosion effect evaluation of wheat straw and its influence on shearstrength of silt

PENG Liyun, LIU Mingjie, LIU Dexin, ZHU Tongyu

Department of Civil and Transportation Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044 ,China

Abstract:In order to solve the problem that wheat straw in soil is easy to be corroded,and to explore the effect of straw reinforcement on the shear strength of silt,the antisepsis of wheat straw with polyvinyl alcohol solution as preservative was studied,and direct shear test on wheat straw reinforced silt was conducted. The test results showed that,the best concentration of polyvinyl alcohol solution was 10% ,and the best soaking time of straw was 4 days； the ultimate tensile force of natural wheat straw decreased with the increase of soaking time,and after 4 days of soaking,the ultimate tensile force decreased by 28.05% ； while the ultimate tensile force of straw was greatly increased by polyvinyl alcohol treatment,the largest increase occurred at 4 days of soaking preservatives ，reaching to 22.6% ； under natural conditions and after rainfall simulation,the ultimate tensile force of wheat straw buried in soil after different time was not different from that of wheat straw after anti-corrosion treatment,and the effect of polyvinyl alcohol was good. The wheat straw reinforced soil conld improve the shear strength of the soil,which had a significant effect on the cohesion compared with the internal friction angle,and the maximum lift of cohesion and internal friction angle was 63.6% and 6.8% respectively ； the optimal reinforcement rate of wheat straw reinforced silt was 0. 6% ,which had the greatest effect on the strength.

Key words:anti-corrosion of wheat straw;straw reinforcement;shear strength;polyvinyl alcohol;ultimate tensile force

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