PSI - Issue 70

Md Azhar et al. / Procedia Structural Integrity 70 (2025) 199–206

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Fig 7. Failure envelopes for unreinforced and reinforced sand. From Fig. 7, it can be opined that the axial stress of soil improves due to increase in confining pressure. The orientation of failure envelop was almost parallel to each other for reinforced soil. Therefore, the variation in friction angle was negligible for reinforced soil as compared with unreinforced soil. The pattern of increase in shear strength of soil was similar for reinforced and unreinforced soil specimen. The improvement in shear strength was only observed due to increase in apparent cohesion of soil, which developed due to inclusion of geotextile layer. Similar study has been performed by Gray & Al-Refeai (1986) and Haeri et al. (2000). The increase in shear strength of reinforced sand enhanced due to increase in interaction of particles, which developed the shear strength of soil through adding cohesion. 4. Conclusions Approaches to reinforce soft soils have become important, because there is a scarcity of suitable lands and high quality construction soil that need to be exploited. Among numerous methods of reinforcement, utilization of jute geotextile has been used to strengthen the material. It could be a sustainable, environmental friendly and biodegradable approach. This study has made a series of triaxial compression experiments on sand samples reinforced with jute geotextile. The basic premise is to study the pattern of enhancement in strength when the reinforcing layer is introduced. It also addresses the appropriate number of geotextile layers for this investigation. The following outcomes were stated below regarding this study: • Geotextile in reinforcement enhances the stress strain characteristics by increasing maximum shear strength and axial strain at failure while also reducing loss of strength after peak. • The stress of shear strength of the reinforced specimen offers a higher value than that of the unreinforced soil. As suggested by observation, the deformation of the reinforcing material should be significant to activate its tensile force in order to increase shear strength in the reinforced condition. • The peak strength ratio is directly proportional to the number of reinforcement layers and inversely proportional to the confining pressure. • The angle of friction is similar for both unreinforced and reinforced sand. The addition of apparent cohesion to the sand contributes to the increase in shear strength of the reinforced sample.