Direct Shear Creep Characteristics and Microstructure of Fiber-Reinforced Soil

Fiber-reinforced soil is an excellent engineering material that has become a focus of research. Most studies on the conventional mechanical properties reinforced soil, such as its tensile, compressive, and shear strength, rarely study creep-related properties. However, when used backfill, creep effect should not be ignored. This explored characteristics mechanics in fiber-reinforcement mechanism, dynamics microstructures before after tests. Direct tests were carried out using direct tester with natural palm fibers equal length (1.5 cm) different amounts (0%, 0.2%, 0.6%, 1.0%). Microscale samples by polarized light scanning electron microscopy. The results show fiber reinforcement can restrain deformation enhance long-term strength soil. nonlinear relationship between content was found, 0.6% being optimal content. Palm have rough surfaces, grooves, independent pore chambers, which increase effective contact area interaction With increases content, interweave to form nestled network structure, integrity Fiber addition changes microstructure pores; proportion large pores decreases small increases. Under creep, follow principle homogenization; are destroyed transformed into pores, causing porosity decrease faster less porous than unreinforced research provide technical reference for application fiber-reinforced