纤维含量对加筋土宏观和微观特性的影响

打开文本图片集

中图分类号：TU411 文献标志码：A 文章编号：2096-6717（2025）04-0001-09

Influence of fiber content on macro and micro characteristics of reinforced soil

CHEN Zhibo，GUO Xuewen，DAI Menglan，LAI Hanjiang，XIE Yongning （Zijin Schoolof Geology and Mining; Fujian-Taiwan Science and Technology Cooperation BaseofFujian Province on Intelligent Geo-environmental Engineering，Fuzhou University，Fuzhou 35Oll6，P.R.China）

Abstract：Fiber content is an important parameter affecting reinforced soil.In existing research，the range of fiber content values is generally small，and the physical and mechanical properties of reinforced soil with higher fiber content are not well understood.In order to study the impact of higher fiber content on rice straw fiberreinforced soil，this study sets up 1O fiber mass fractions and uses direct shear tests for research，exploring the effect of fiber content on the strength characteristics of reinforced soil.Additionally，scanning electron microscopy （SEM） and nuclear magnetic resonance （NMR）tests are used to analyze the microstructure features of fiber-reinforced soil.Theresults show that adding fibers can efectively improvethe shear strength ofthe soil. The reinforcement mechanism offiber-reinforced soil is related to fiber content.A smallfiber content has litle effcton the porosityof the soil，and the reinforced soil is based on the soil skeleton.When the fiber content is high，the porosity increases significantly，and the main structure of the reinforced soil would be composed of boththesoil skeleton and thefiber skeleton.

Keywords：reinforced soil； fiber content;shear strength;micro characteristics

土体力学强度是影响工程安全的关键因素。（剩余14291字）