Experimental Study on Fatigue Performance of Foamed Lightweight Soil

1st International Conference on Frontiers of Materials Synthesis and Processing

材料科学;化学

Qiu, Youqiang^1,4 ; Yang, Ping^2 ; Li, Yongliang^3 ; Zhang, Liujun^1,4

School of Highway, Chang'An University, Xian

710064, China^1

China Railway Pearl River Delta Investment Development Co. Ltd., Foshan

528300, China^2

Shanghai Civil Engineering Co. Ltd., Hefei

200436, China^3

CCCC First Highway Consultants Co. Ltd., Xian

710075, China^4

关键词: Fatigue equations;    Fatigue performance;    Guarantee ratio;    Lightweight soils;    Linear relationships;    Log-normal distribution;    Mathematical statistics methods;    Research domains;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/274/1/012068/pdf
DOI  :  10.1088/1757-899X/274/1/012068

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

In order to study fatigue performance of foamed lightweight soil and forecast its fatigue life in the supporting project, on the base of preliminary tests, beam fatigue tests on foamed lightweight soil is conducted by using UTM-100 test system. Based on Weibull distribution and lognormal distribution, using the mathematical statistics method, fatigue equations of foamed lightweight soil are obtained. At the same time, according to the traffic load on real road surface of the supporting project, fatigue life of formed lightweight soil is analyzed and compared with the cumulative equivalent axle loads during the design period of the pavement. The results show that even the fatigue life of foamed lightweight soil has discrete property, the linear relationship between logarithmic fatigue life and stress ratio still performs well. Especially, the fatigue life of Weibull distribution is more close to that derived from the lognormal distribution, in the instance of 50% guarantee ratio. In addition, the results demonstrated that foamed lightweight soil as subgrade filler has good anti-fatigue performance, which can be further adopted by other projects in the similar research domain.