BEHAVIOUR OF STRIP FOOTINGS ON SANDS REINFORCED BY GEOCELL AND RUBBER PARTICLES SUBJECTED TO CYCLIC LOADING
Geosynthetics have been extensively used as soil reinforcements under footings especially in soft grounds. Geocell is a form of three-dimensional reinforcement which is able to...
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Sharif University of Technology
2018-02-01
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| Series: | مهندسی عمران شریف |
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| Online Access: | https://sjce.journals.sharif.edu/article_1262_757590ac1231554dc283c92a14aa8eec.pdf |
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| author | M. Mohammadi S. M. Mir Mohammad Hosseini M. Kargar |
| author_facet | M. Mohammadi S. M. Mir Mohammad Hosseini M. Kargar |
| author_sort | M. Mohammadi |
| collection | DOAJ |
| description | Geosynthetics have been extensively used as soil reinforcements under footings especially in soft grounds. Geocell is a form of three-dimensional reinforcement which is able to provide greater bearing capacity due to confinement compared to planar types of reinforcements like geogrids and geotextiles. On the other hand, using tire shreds, in addition to improving soil properties would have favourable environmental effects that causes a great tendency for its utilization in engineering projects. In order to study the cyclic and post-cyclic behaviours of strip footings on sands reinforced by geocells and rubber particles, a small-scale physical model in soil mechanics laboratory of Amirkabir University of Technology has been developed. Main parts of the laboratory apparatus include the footing model, the soil container, raining system, loading equipment and data acquisition system. Geocells with
different geometrical dimensions, yet the same material have been used in a specific location in sand layers. To investigate the effect of rubber particle size mixed with sand as the geocell infill material, the geocell pockets have been filled with different materials; namely pure sand, pure rubber particles and mixture of rubber particles and sand at desired densities. Then a static loading is applied to the footing followed by a cyclic loading up to 1000 load cycles. Finally, the static loads are re-applied until failure occurs. The study's results indicate that in similar compaction condition, substituting a percentage of sand with rubber particles of greater size leads to reduction in plastic settlement and increment in elastic settlement. In the case of mixing sand with rubber powder with the smaller particle size, the settlement would increase while the bearing capacity decreases. Therefore, it is concluded that using the mixture of soil and rubber particles of greater particle sizes compared to soil grains would improve the cyclic behaviour of reinforced soil by decreasing the permanent or plastic settlements. |
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| last_indexed | 2024-03-12T13:18:39Z |
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| spelling | doaj.art-94f7b379d8cd42a0b7b35670e68ede4f2023-08-26T10:20:10ZfasSharif University of Technologyمهندسی عمران شریف2676-47682676-47762018-02-0133.24.1495910.24200/j30.2018.12621262BEHAVIOUR OF STRIP FOOTINGS ON SANDS REINFORCED BY GEOCELL AND RUBBER PARTICLES SUBJECTED TO CYCLIC LOADINGM. Mohammadi0S. M. Mir Mohammad Hosseini1M. Kargar2Dept. of Civil and Environmental Engineering Amirkabir University of TechnologyDept. of Civil and Environmental Engineering Amirkabir University of TechnologyDept. of Civil and Environmental Engineering Amirkabir University of TechnologyGeosynthetics have been extensively used as soil reinforcements under footings especially in soft grounds. Geocell is a form of three-dimensional reinforcement which is able to provide greater bearing capacity due to confinement compared to planar types of reinforcements like geogrids and geotextiles. On the other hand, using tire shreds, in addition to improving soil properties would have favourable environmental effects that causes a great tendency for its utilization in engineering projects. In order to study the cyclic and post-cyclic behaviours of strip footings on sands reinforced by geocells and rubber particles, a small-scale physical model in soil mechanics laboratory of Amirkabir University of Technology has been developed. Main parts of the laboratory apparatus include the footing model, the soil container, raining system, loading equipment and data acquisition system. Geocells with different geometrical dimensions, yet the same material have been used in a specific location in sand layers. To investigate the effect of rubber particle size mixed with sand as the geocell infill material, the geocell pockets have been filled with different materials; namely pure sand, pure rubber particles and mixture of rubber particles and sand at desired densities. Then a static loading is applied to the footing followed by a cyclic loading up to 1000 load cycles. Finally, the static loads are re-applied until failure occurs. The study's results indicate that in similar compaction condition, substituting a percentage of sand with rubber particles of greater size leads to reduction in plastic settlement and increment in elastic settlement. In the case of mixing sand with rubber powder with the smaller particle size, the settlement would increase while the bearing capacity decreases. Therefore, it is concluded that using the mixture of soil and rubber particles of greater particle sizes compared to soil grains would improve the cyclic behaviour of reinforced soil by decreasing the permanent or plastic settlements.https://sjce.journals.sharif.edu/article_1262_757590ac1231554dc283c92a14aa8eec.pdfgeocellgeocellstrip footingstrip footingbearing capacitybearing capacitytire shredstire shredstire particlestire particlesplastic settlementplastic settlementelastic settlementelastic settlementcyclic loadingcyclic loading |
| spellingShingle | M. Mohammadi S. M. Mir Mohammad Hosseini M. Kargar BEHAVIOUR OF STRIP FOOTINGS ON SANDS REINFORCED BY GEOCELL AND RUBBER PARTICLES SUBJECTED TO CYCLIC LOADING مهندسی عمران شریف geocell geocell strip footing strip footing bearing capacity bearing capacity tire shreds tire shreds tire particles tire particles plastic settlement plastic settlement elastic settlement elastic settlement cyclic loading cyclic loading |
| title | BEHAVIOUR OF STRIP FOOTINGS ON SANDS REINFORCED BY GEOCELL AND RUBBER PARTICLES SUBJECTED TO CYCLIC LOADING |
| title_full | BEHAVIOUR OF STRIP FOOTINGS ON SANDS REINFORCED BY GEOCELL AND RUBBER PARTICLES SUBJECTED TO CYCLIC LOADING |
| title_fullStr | BEHAVIOUR OF STRIP FOOTINGS ON SANDS REINFORCED BY GEOCELL AND RUBBER PARTICLES SUBJECTED TO CYCLIC LOADING |
| title_full_unstemmed | BEHAVIOUR OF STRIP FOOTINGS ON SANDS REINFORCED BY GEOCELL AND RUBBER PARTICLES SUBJECTED TO CYCLIC LOADING |
| title_short | BEHAVIOUR OF STRIP FOOTINGS ON SANDS REINFORCED BY GEOCELL AND RUBBER PARTICLES SUBJECTED TO CYCLIC LOADING |
| title_sort | behaviour of strip footings on sands reinforced by geocell and rubber particles subjected to cyclic loading |
| topic | geocell geocell strip footing strip footing bearing capacity bearing capacity tire shreds tire shreds tire particles tire particles plastic settlement plastic settlement elastic settlement elastic settlement cyclic loading cyclic loading |
| url | https://sjce.journals.sharif.edu/article_1262_757590ac1231554dc283c92a14aa8eec.pdf |
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