Experimental study on one dimensional creep behavior of loess reinforced with fiber yarn

被引：0
|
作者：
Chu F. [1 ]
Shao S. [2 ]
Deng G. [3 ]
Chen C. [2 ]
机构：
[1] School of Urban Planning and Municipal Engineering, Xi'an Polytechnic University, Xi'an
[2] Institute of Geotechnical Engineering, Xi'an University of Technology, Xi'an
[3] Xi'an Loess Underground Engineering Technology Consulting Co., Ltd., Xi'an
来源：
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | 2022年 / 41卷 / 05期
基金：
上海市自然科学基金;
关键词：
Creep model; Creep test; Fiber yarn; Loess; Reinforced; Soil mechanics;
D O I：
10.13722/j.cnki.jrme.2021.0644
中图分类号：
学科分类号：
摘要：
The Loess reinforced with fiber yarn was prepared by adding a certain proportion and length of fiber yarn, originating from waste textile fabric through opening, combing and cutting, into loess, and one dimensional creep deformation characteristics of fiber reinforced loess under different vertical loads were studied by using one-dimensional creep apparatus. The test results show that, under different vertical loads, the creep strain of the fiber reinforced loess is smaller than that of the plain loess, indicating that fiber yarn reinforcement has a positive effect on restraining the creep deformation of loess. When the vertical load is greater than 400kPa, the time for the fiber reinforced loess to reach stable creep is longer than that of the plain loess. With increasing the proportion and the length of fiber yarn, the creep strain of the loess reinforced by fiber yarn first decreases and then increases. The optimum blending ratio and the optimum blending length of fiber yarn are0.3% and 30mm respectively. The creep index expression was constructed to reflect the long-term strength stability of soil after entering the creep stage. When the vertical load is between 400 and 800kPa, the creep index increases significantly. When the vertical load is greater than 800 kPa, the creep index tends to be stable. Based on the data of one-dimensional creep test, an empirical model of one-dimensional creep of loess reinforced with fiber yarn is established considering the influence of fiber yarn proportion and fiber yarn length. © 2022, Science Press. All right reserved.
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页码：1054 / 1066
页数：12
相关论文
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