聚丙烯纤维水泥加固土质边坡的抗冲刷有效性分析  

Analysis of the anti-erosion effectiveness of polypropylene fiber(PPF)cement-reinforced soil for slope protection

作　　者：亓星 杨浪 刘焕 曹汝亮 QI Xing;YANG Lang;LIU Huan;CAO Ruliang(School of Civil Engineering,Sichuan University of Science and Engineering,Zigong,Sichuan 643000,China)

机构地区：[1]四川轻化工大学土木工程学院,四川自贡643000

出　　处：《中国地质灾害与防治学报》2025年第1期84-91,共8页The Chinese Journal of Geological Hazard and Control

基　　金：地质灾害防治与地质环境保护国家重点实验室开放基金(SKLGP2022K008);四川矿产资源研究中心资助项目(SCKCZY2022-YB017)。

摘　　要：以水泥和聚丙烯纤维在粉质黏土边坡坡面抗冲刷防护应用为背景,探讨了聚丙烯纤维水泥加固粉质黏土边坡的抗冲刷有效性。基于室内试验,开展水泥和纤维的掺量对粉质黏土抗剪强度影响试验,并基于试验配比进行边坡冲刷模拟。结果表明:水泥掺量与粉质黏土的抗剪强度呈正相关,聚丙烯纤维可进一步提高加固土的黏聚力;边坡坡比对土体的抗冲刷效果呈先增大后减小的影响;与未加固的素土坡面相比,加固后的边坡坡面抗冲刷能力得到显著提高,从SEM试验中发现,加固土抗冲刷能力提高是由于水泥水化作用和聚丙烯纤维的分散排列使加固后的土壤颗粒相互吸引,形成了坚固的结构,从而提高了土壤抗渗透性。研究结果为边坡抗冲刷防护提供了新的工程应用思路。Taking the application of cement and polypropylene fiber in the protection of silty clay slope as the research background,this paper explores the validity analysis of polypropylene fiber cement reinforcement material on the anti-erosion ability of silty clay slope.Based on indoor experiments,the research investigated the effects of varying cement and fiber content on the shear strength of silty clay.A slope erosion model experiment was conducted based on predetermined experimental ratios.The results indicate a positive correlation between cement content and the shear strength of silty clay.Additionally,polypropylene fiber was found to further improve the cohesion of the reinforced soil.The slope ratio initially enhances and then diminishes the anti-erosion effect on the soil.Compared to unreinforced slopes,the erosion resistance of the strengthened side slope is significantly improved.Scanning electron microscopy(SEM)analyses revealed that the improved erosion resistance of the reinforced soil results from the hydration of cement and the dispersed arrangement of polypropylene fibers,which promote interparticle cohesion and form a robust structure,thereby enhancing the soil’s impermeability.The research results offer novel engineering application insights for protecting slopes against erosion.

关 键 词：聚丙烯纤维 加固土 抗剪强度 冲刷试验 边坡稳定性 

分 类 号：P642.22[天文地球—工程地质学]