聚丙烯纤维加固膨胀土边坡稳定性分析  

Slope Stability Analysis of Polypropylene Fiber Reinforced Expansive Soil

作　　者：任浩 张紫怡 党芳 郝晨曦 张宇航 南亚林[3,4] 郭鸿 杨奎斌[1,5] Ren Hao;Zhang Ziyi;Dang Fang;Hao Chenxi;Zhang Yuhang;Nan Yalin;Guo Hong;Yang Kuibin(School of Civil Engineering and Architecture,Shaanxi University of Technology,Hanzhong 723001,Shaanxi,China;Student Research Society of Human Settlements,Shaanxi University of Technology,Hanzhong 723001,Shaanxi,China;China Electronic Research Institute of Engineering Investigations and Design,Xi’an 710054,Shaanxi,China;Soil Engineering Technology Research Center of Shaanxi,Xi’an 710054,Shaanxi,China;Research Center of Geotechnical Environment and Geological Hazards Control in Qinling-Daba Mountains,Shaanxi University of Technology,Hanzhong 723001,Shaanxi,China)

机构地区：[1]陕西理工大学土木工程与建筑学院,陕西汉中723001 [2]陕西理工大学人居环境科研学社,陕西汉中723001 [3]信息产业部电子综合勘察研究院,陕西西安710054 [4]陕西省土体工程技术研究中心,陕西西安710054 [5]陕西理工大学秦巴山地岩土环境与灾害防治研究中心,陕西汉中723001

出　　处：《岩土工程技术》2024年第1期90-94,共5页Geotechnical Engineering Technique

基　　金：陕西省重点研发计划项目(2023-YBSF-324);陕西省教育厅服务地方专项计划项目(23JC019);国家级大学生创新创业计划项目(202210720001)。

摘　　要：为提高膨胀土边坡稳定性,改善膨胀土力学性能,使用聚丙烯纤维对膨胀土进行改性。通过直剪试验计算出不同围压、不同聚丙烯纤维掺量改性膨胀土边坡的抗剪强度变化规律,并应用Geostudio软件中的极限平衡法对不同聚丙烯纤维掺量的膨胀土边坡进行分析。研究发现,聚丙烯纤维含量在一定范围内可有效提高膨胀土边坡抗剪强度,掺量0.14%的纤维土在直剪试验中表现出较好的抗剪性能,Geostudio极限平衡法分析结果显示,0.14%纤维土边坡稳定系数为2.431,较素膨胀土边坡稳定性系数提高0.591。建议采用掺量0.14%的纤维土加固膨胀土边坡。To improve the slope stability of the expanding soil and improve the mechanical properties of the expanding soil,the polypropylene fiber was used to modify the expanded soil,and the shear strength change law of the slope of the modified expansion soil with different confining pressure and different polypropylene fiber dosage was calculated through the straight shear test,and then the slope of the expanded soil with different polypropylene fiber content was analyzed based on Geostudio software using the limit equilibrium method.It is found that the polypropylene fiber content can effectively improve the shear strength of the slope of the expanded soil within a certain range,and the 0.14%fiber soil showed good shear resistance in the straight shear test.The analysis results of Geostudio's limit equilibrium method show that the stability coefficient of 0.14%fiber soil slope is 2.431,which is 0.591 higher than that of plain expansive soil slope.It is recommended to use 0.14%fibrous soil to strengthen the slope of expanded soil.

关 键 词：直剪试验 Geostudio软件 极限平衡法 聚丙烯纤维 加固膨胀土边坡 

分 类 号：TU411[建筑科学—岩土工程]