Analysis of crack characteristics of fiber-reinforced expansive soil under wetting-drying cycle

被引：0

作者：

Han C.-P. ^{[1
]}

Tian J.-Y. ^{[1
]}

Zhang J. ^{[1
]}

Li J.-H. ^{[1
]}

机构：

[1] College of Civil Engineering, Northeast Forestry University, Harbin

来源：

Jilin Daxue Xuebao (Gongxueban)/Journal of Jilin University (Engineering and Technology Edition) | 2019年 / 49卷 / 02期

关键词：

Crack characteristics; Expansive soil; Optimal mixing ratio; Polypropylene fiber; Quantitative analysis; Road engineering; Wetting-drying cycles;

D O I：

10.13229/j.cnki.jdxbgxb20180019

中图分类号：

学科分类号：

摘要：

In order to study the effect and mechanism of fiber reinforced expansive soil and inhibit failure, unconfined compression experiment of the expansive soil was carried out. Image processing technique was used to analyze the cracking characteristics of the soil and the effect of fiber reinforcement on the crack development under wetting-drying cycles. Results show that adding fiber in the expansive soil can significantly improve the soil unconfined compressive strength. When the fiber content is 0.7% the soil reinforcement effect is most significant. Under wetting-drying cycles, the development of soil surface cracks continues to expand along the original channel. With the increase in cycle number, the crack area ratio and total crack length on the soil surface gradually increase, while the average crack width decreases. The addition of fiber in expansive soil can effectively restrain the development of fracture. The results of this research can provide reference for fiber reinforced soil in practical engineering, such as the expansive subgrade, slop protection design and construction. © 2019, Jilin University Press. All right reserved.

引用

页码：392 / 400

页数：8

共 18 条

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