Triaxial Axis Shear Mechanical Properties of Fiber-Reinforced Foamed Lightweight Soil

doi:10.1061/(ASCE)MT.1943-5533.0003632

	Triaxial Axis Shear Mechanical Properties of Fiber-Reinforced Foamed Lightweight Soil
	Jiangbo, Xu 1; Yongzhen, Luo 1; Yuanzhi, Wang 1; Changgen, Yan 1; Liujun, Zhang 2; Lihua, Yin 2; Xiaohua, Yang 1; Youqiang, Qiu 2; Hengxing, Lan 3
刊名	JOURNAL OF MATERIALS IN CIVIL ENGINEERING
	2021-04-01
卷号	33 期号:4 页码:15
关键词	Fiber-reinforced foamed lightweight soil Triaxial shear test Stress– strain relation Crack closure model Polyethylene fiber
ISSN号	0899-1561
DOI	10.1061/(ASCE)MT.1943-5533.0003632
通讯作者	Jiangbo, Xu(xujiangbo@yeah.net)
英文摘要	Fiber-reinforced foamed lightweight soil is a new type of material that is mixed with cement, foam, polypropylene fiber, and water, and has been applied in the reinforcement of soft soil subgrade. However, it has not yet formed a complete theoretical system. Currently, it is imperative to explore the fiber-reinforced foamed lightweight soil. In this paper, the shear strength characteristics of polypropylene fiber-reinforced foamed lightweight soil with different reinforcement ratios and confining pressures are compared using the global digital systems (GDS) triaxial shear test. It is found that the triaxial shear strength and cohesion first increases, then decreases with the increase of reinforcement ratio, the maximum of which occurs at 0.75% reinforcement rate. The internal friction angle of fiber-reinforced foamed lightweight soil is less affected by the reinforcement ratio. This indicates that the cohesive force of the material is the main factor that affects the strength of the polypropylene fiber-reinforced foamed lightweight soil. The strength reduction rate presents an obvious downward trend with the increase of the reinforcement rate. It reaches from about 40% to 10%, and keeps stable at 10%. From investigating the influence of reinforcement ratio and confining pressure on strength parameters, the research obtains the law of crack propagation of fiber-reinforced foamed lightweight soil and establishes the stress-strain relationship equation. The constitutive equations for the strength parameters of foamed lightweight soil in terms of reinforcement ratio and confining pressure are proposed. After normalizing the experimental data of different reinforcement ratios, the study obtains the stress-strain equation of fiber-reinforced foamed lightweight soil and variation of equation parameters with the influence of stiffening rate and confining pressure.
资助项目	National Natural Science Foundation of China[41790443] ; National Natural Science Foundation of China[41927806] ; National Key R&D Program of China[2016YFC0802203-8] ; Fund of National-Local Joint Engineering Laboratory for Road Engineering and Disaster Prevention and Mitigation Technology in Mountainous Areas ; Natural Science Foundation of Shaanxi Province[2019JQ-218] ; Fundamental Research Funds for the Central Universities, CHD[300102219213] ; Key Research and Development Program of Shaanxi[2018ZDXM-SF-024] ; Key Research and Development Program of Shaanxi[2019ZDLSF05-07] ; Key Research and Development Program of Shaanxi[2017ZDCXL-SF-03-01-01] ; Natural Science Foundation of Qinghai Province[2019-ZJ-7050]
WOS研究方向	Construction & Building Technology ; Engineering ; Materials Science
语种	英语
出版者	ASCE-AMER SOC CIVIL ENGINEERS
WOS记录号	WOS:000634780800032
资助机构	National Natural Science Foundation of China ; National Key R&D Program of China ; Fund of National-Local Joint Engineering Laboratory for Road Engineering and Disaster Prevention and Mitigation Technology in Mountainous Areas ; Natural Science Foundation of Shaanxi Province ; Fundamental Research Funds for the Central Universities, CHD ; Key Research and Development Program of Shaanxi ; Natural Science Foundation of Qinghai Province
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/161958]
专题	中国科学院地理科学与资源研究所
通讯作者	Jiangbo, Xu
作者单位	1.Changan Univ, Highway Sch, 126 Middle Sect South Erhuan Rd, Xian 710064, Shaanxi, Peoples R China 2.CCCC First Highway Consultants Co Ltd, 4,South Univ Rd, Xian 710075, Shaanxi, Peoples R China 3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, 11 Datun Rd, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Jiangbo, Xu,Yongzhen, Luo,Yuanzhi, Wang,et al. Triaxial Axis Shear Mechanical Properties of Fiber-Reinforced Foamed Lightweight Soil[J]. JOURNAL OF MATERIALS IN CIVIL ENGINEERING,2021,33(4):15.
APA	Jiangbo, Xu.,Yongzhen, Luo.,Yuanzhi, Wang.,Changgen, Yan.,Liujun, Zhang.,...&Hengxing, Lan.(2021).Triaxial Axis Shear Mechanical Properties of Fiber-Reinforced Foamed Lightweight Soil.JOURNAL OF MATERIALS IN CIVIL ENGINEERING,33(4),15.
MLA	Jiangbo, Xu,et al."Triaxial Axis Shear Mechanical Properties of Fiber-Reinforced Foamed Lightweight Soil".JOURNAL OF MATERIALS IN CIVIL ENGINEERING 33.4(2021):15.