Abstract
Based on the consolidated undrained test under cyclic loading, the mechanical response of fiber-reinforced sand under cyclic loading was studied by varying fiber content (0.2% and 0.4%), fiber length (7 mm and 13 mm), and cyclic stress ratio (0.22, 0.24 and 0.26), and the effects of fiber content and fiber length on the excess pore water pressure, dynamic strength and dynamic shear modulus were discussed. The results showed that with the increasing of fiber content, the dynamic strength and liquefaction resistance increased, whereas the accumulation rate of excess pore water pressure decreased. The reduction rate of dynamic shear modulus decreased with the increasing of fiber length, and the dynamic strength decreased with the increasing of cyclic stress ratio, which indicated that the dynamic characteristics of fiber-reinforced sand were better than that of unreinforced sand.
Highlights
In recent years, the scale of traffic infrastructure continues to expand, and the requirements for subgrade fillers are higher and higher
Because the fiber is evenly distributed in the soil, it can play the role of reinforcement in all directions, so it can significantly improve the strength and deformation capacity of the soil, without causing environmental pollution, which has been widely concerned in engineering applications
The results showed that the fiber can inhibit the expansion of the initial crack to a certain extent
Summary
The scale of traffic infrastructure continues to expand, and the requirements for subgrade fillers are higher and higher. Welker and Josten [2] carried out direct shear test on fiber-reinforced soil under the condition of optimal moisture content. Consoli et al [4] conducted triaxial compression test and field plate test on fiber-reinforced soil, and the test results showed that the addition of fiber could improve the soil. Mesbah et al [5] carried out direct tensile test on fiber-reinforced soil to evaluate the tensile performance of the soil. Based on the compressive strength test, Consoli et al [7] found that the compressive strength of cement soil can be significantly improved by adding appropriate amount of fiber. Akbulut et al [8] studied the shear strength characteristics of fiber-reinforced clay, and found that adding fiber can increase the cohesion and internal friction angle of clay. Tang et al [10] pointed out that the reinforcement mechanism of fiber mainly depends on the interaction between fiber and clay
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
