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Investigations on the Performance of Soft Soil Subgrade Using Sand-Tyre Mattress and Geogrid-Reinforcement
https://orcid.org/http://orcid.org/0000-0002-1751-8020
Experimental investigations were conducted using laboratory physical model tests to examine the behaviour of circular footing (diameter, D = 150 mm) resting on sand-tyre shred mattress overlying soft clay soil (undrained shear strength, Cu = 14.5 kPa), with and without geogrid reinforcement at the interface of soft soil and sand-tyre mattress. Results revealed that the inclusion of tyre shreds (7.5% by volume) with sand, over the soft soil subgrade, increase the load-bearing pressure by 200.01% (at a height of sand tyre mixture, hSTM = 1.5D), i.e., 3.5 times higher in comparison to the soft soil subgrade foundation system S-I. Further, with the use of geogrid in between soft soil subgrade and sand-tyre mattress, bearing pressure foundation system S-VI (i.e., clay + geogrid + sand + 7.5% tyre-shred) is increased by 211.84% at hSTM = 1.5D, which is nearly 4.1 times higher than S-I foundation system. It was also observed that the footing settlement was substantially reduced with the application of geogrid between the soft soil subgrade and the sand-tyre mattress. Thus, it can be stated that the addition of tyre-shred to the sand over the soft soil subgrade, with or without geogrid reinforcement, is an effective techniques to improve the performance of soft soil subgrade systems. Moreover, this study offers a practical and sustainable solution for the application of tyre-shreds in geotechnical engineering to enhance the load-bearing capacity of soft soil subgrades.
Investigations on the Performance of Soft Soil Subgrade Using Sand-Tyre Mattress and Geogrid-Reinforcement
https://orcid.org/http://orcid.org/0000-0002-1751-8020
Experimental investigations were conducted using laboratory physical model tests to examine the behaviour of circular footing (diameter, D = 150 mm) resting on sand-tyre shred mattress overlying soft clay soil (undrained shear strength, Cu = 14.5 kPa), with and without geogrid reinforcement at the interface of soft soil and sand-tyre mattress. Results revealed that the inclusion of tyre shreds (7.5% by volume) with sand, over the soft soil subgrade, increase the load-bearing pressure by 200.01% (at a height of sand tyre mixture, hSTM = 1.5D), i.e., 3.5 times higher in comparison to the soft soil subgrade foundation system S-I. Further, with the use of geogrid in between soft soil subgrade and sand-tyre mattress, bearing pressure foundation system S-VI (i.e., clay + geogrid + sand + 7.5% tyre-shred) is increased by 211.84% at hSTM = 1.5D, which is nearly 4.1 times higher than S-I foundation system. It was also observed that the footing settlement was substantially reduced with the application of geogrid between the soft soil subgrade and the sand-tyre mattress. Thus, it can be stated that the addition of tyre-shred to the sand over the soft soil subgrade, with or without geogrid reinforcement, is an effective techniques to improve the performance of soft soil subgrade systems. Moreover, this study offers a practical and sustainable solution for the application of tyre-shreds in geotechnical engineering to enhance the load-bearing capacity of soft soil subgrades.
Investigations on the Performance of Soft Soil Subgrade Using Sand-Tyre Mattress and Geogrid-Reinforcement
https://orcid.org/http://orcid.org/0000-0002-1751-8020
Experimental investigations were conducted using laboratory physical model tests to examine the behaviour of circular footing (diameter, D = 150 mm) resting on sand-tyre shred mattress overlying soft clay soil (undrained shear strength, Cu = 14.5 kPa), with and without geogrid reinforcement at the interface of soft soil and sand-tyre mattress. Results revealed that the inclusion of tyre shreds (7.5% by volume) with sand, over the soft soil subgrade, increase the load-bearing pressure by 200.01% (at a height of sand tyre mixture, hSTM = 1.5D), i.e., 3.5 times higher in comparison to the soft soil subgrade foundation system S-I. Further, with the use of geogrid in between soft soil subgrade and sand-tyre mattress, bearing pressure foundation system S-VI (i.e., clay + geogrid + sand + 7.5% tyre-shred) is increased by 211.84% at hSTM = 1.5D, which is nearly 4.1 times higher than S-I foundation system. It was also observed that the footing settlement was substantially reduced with the application of geogrid between the soft soil subgrade and the sand-tyre mattress. Thus, it can be stated that the addition of tyre-shred to the sand over the soft soil subgrade, with or without geogrid reinforcement, is an effective techniques to improve the performance of soft soil subgrade systems. Moreover, this study offers a practical and sustainable solution for the application of tyre-shreds in geotechnical engineering to enhance the load-bearing capacity of soft soil subgrades.
Investigations on the Performance of Soft Soil Subgrade Using Sand-Tyre Mattress and Geogrid-Reinforcement
Int. J. of Geosynth. and Ground Eng.
Sah, Bikash Kumar (author) / Kumar, Shiv Shankar (author) / Krishna, A. Murali (author)
2025-02-01
Article (Journal)
Electronic Resource
English
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