纤维对桥墩砂土地基的力学性能改善试验研究  

Experimental Study on the Improvement of Mechanical Properties of Fibers in Bridge Pier Sandy Soil Foundation

作　　者：李振成[1] LI Zhen-cheng(Guangxi Transport Vocational and Technical College,Nanning 530023,Guangxi,China)

机构地区：[1]广西交通职业技术学院,广西南宁530023

出　　处：《合成纤维》2024年第11期88-91,共4页Synthetic Fiber in China

摘　　要：研究了聚酯纤维、玄武岩纤维和甘蔗渣纤维对桥墩砂土地基的力学性能影响。通过对不同纤维质量分数(0.5%、1%和2%)以及不同纤维长度(2.5、5.0、7.5 mm)下砂土试样的加州承载比(CBR)和间接抗拉强度进行测试。结果表明:长度为7.5 mm的聚酯纤维可获得最高的CBR值,其数值比未添加纤维的砂土试样增加了约3.3倍;三种纤维中,甘蔗渣纤维具有最佳的间接抗拉强度。该研究结果为遭遇不良地质条件的桥墩砂土地基改良和设计提供了有益的指导。The influence of polyester fibers,basalt fibers,and sugarcane bagasse fibers on the mechanical properties of bridge pier sandy soil foundation was investigated.The California bearing ratio and indirect tensile strength of sandy soil samples with different fiber mass percent(0.5%,1%,and 2%)and fiber lengths(2.5,5.0,7.5 mm)were tested.The results show that the highest CBR value can be obtained for poly-ester fiber with length of 7.5 mm,which is about 3.3 times higher than that for sand sample without fiber.Among the three fibers,sugarcane bagasse fiber has the best indirect tensile strength.The study provides useful guidance for the improvement and design of sandy soil foundations for bridge piers that encounter ad-verse geological conditions.

关 键 词：桥墩地基 砂土 聚酯纤维 玄武岩纤维 甘蔗渣纤维 加州承载比 间接抗拉强度 

分 类 号：TQ342.21[化学工程—化纤工业] U444[建筑科学—桥梁与隧道工程]