Analytical model for predicting time-dependent lateral deformation of geosynthetics-reinforced soil walls with modular block facing
To date, few models are available in the literature to consider the creep behavior of geosynthetics when predicting the lateral deformation (δ) of geosynthetics-reinforced soil (GRS) retaining walls. In this study, a general hyperbolic creep model was first introduced to describe the long-term defor...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-02-01
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| Series: | Journal of Rock Mechanics and Geotechnical Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1674775523001865 |
| _version_ | 1797322420960362496 |
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| author | Luqiang Ding Chengzhi Xiao Feilong Cui |
| author_facet | Luqiang Ding Chengzhi Xiao Feilong Cui |
| author_sort | Luqiang Ding |
| collection | DOAJ |
| description | To date, few models are available in the literature to consider the creep behavior of geosynthetics when predicting the lateral deformation (δ) of geosynthetics-reinforced soil (GRS) retaining walls. In this study, a general hyperbolic creep model was first introduced to describe the long-term deformation of geosynthetics, which is a function of elapsed time and two empirical parameters a and b. The conventional creep tests with three different tensile loads (Pr) were conducted on two uniaxial geogrids to determine their creep behavior, as well as the a-Pr and b-Pr relationships. The test results show that increasing Pr accelerates the development of creep deformation for both geogrids. Meanwhile, a and b respectively show exponential and negatively linear relationships with Pr, which were confirmed by abundant experimental data available in other studies. Based on the above creep model and relationships, an accurate and reliable analytical model was then proposed for predicting the time-dependent δ of GRS walls with modular block facing, which was further validated using a relevant numerical investigation from the previous literature. Performance evaluation and comparison of the proposed model with six available prediction models were performed. Then a parametric study was carried out to evaluate the effects of wall height, vertical spacing of geogrids, unit weight and internal friction angle of backfills, and factor of safety against pullout on δ at the end of construction and 5 years afterwards. The findings show that the creep effect not only promotes δ but also raises the elevation of the maximum δ along the wall height. Finally, the limitations and application prospects of the proposed model were discussed and analyzed. |
| first_indexed | 2024-03-08T05:14:04Z |
| format | Article |
| id | doaj.art-537ff890ef704f648b22f9b65f9f75ec |
| institution | Directory Open Access Journal |
| issn | 1674-7755 |
| language | English |
| last_indexed | 2024-03-08T05:14:04Z |
| publishDate | 2024-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Rock Mechanics and Geotechnical Engineering |
| spelling | doaj.art-537ff890ef704f648b22f9b65f9f75ec2024-02-07T04:44:17ZengElsevierJournal of Rock Mechanics and Geotechnical Engineering1674-77552024-02-01162711725Analytical model for predicting time-dependent lateral deformation of geosynthetics-reinforced soil walls with modular block facingLuqiang Ding0Chengzhi Xiao1Feilong Cui2School of Civil and Transportation Engineering, Hebei University of Technology, Tianjin, 300401, ChinaCorresponding author.; School of Civil and Transportation Engineering, Hebei University of Technology, Tianjin, 300401, ChinaSchool of Civil and Transportation Engineering, Hebei University of Technology, Tianjin, 300401, ChinaTo date, few models are available in the literature to consider the creep behavior of geosynthetics when predicting the lateral deformation (δ) of geosynthetics-reinforced soil (GRS) retaining walls. In this study, a general hyperbolic creep model was first introduced to describe the long-term deformation of geosynthetics, which is a function of elapsed time and two empirical parameters a and b. The conventional creep tests with three different tensile loads (Pr) were conducted on two uniaxial geogrids to determine their creep behavior, as well as the a-Pr and b-Pr relationships. The test results show that increasing Pr accelerates the development of creep deformation for both geogrids. Meanwhile, a and b respectively show exponential and negatively linear relationships with Pr, which were confirmed by abundant experimental data available in other studies. Based on the above creep model and relationships, an accurate and reliable analytical model was then proposed for predicting the time-dependent δ of GRS walls with modular block facing, which was further validated using a relevant numerical investigation from the previous literature. Performance evaluation and comparison of the proposed model with six available prediction models were performed. Then a parametric study was carried out to evaluate the effects of wall height, vertical spacing of geogrids, unit weight and internal friction angle of backfills, and factor of safety against pullout on δ at the end of construction and 5 years afterwards. The findings show that the creep effect not only promotes δ but also raises the elevation of the maximum δ along the wall height. Finally, the limitations and application prospects of the proposed model were discussed and analyzed.http://www.sciencedirect.com/science/article/pii/S1674775523001865GeosyntheticsCreep behaviorGeosynthetics-reinforced soil (GRS) wallsLateral deformationAnalytical model |
| spellingShingle | Luqiang Ding Chengzhi Xiao Feilong Cui Analytical model for predicting time-dependent lateral deformation of geosynthetics-reinforced soil walls with modular block facing Journal of Rock Mechanics and Geotechnical Engineering Geosynthetics Creep behavior Geosynthetics-reinforced soil (GRS) walls Lateral deformation Analytical model |
| title | Analytical model for predicting time-dependent lateral deformation of geosynthetics-reinforced soil walls with modular block facing |
| title_full | Analytical model for predicting time-dependent lateral deformation of geosynthetics-reinforced soil walls with modular block facing |
| title_fullStr | Analytical model for predicting time-dependent lateral deformation of geosynthetics-reinforced soil walls with modular block facing |
| title_full_unstemmed | Analytical model for predicting time-dependent lateral deformation of geosynthetics-reinforced soil walls with modular block facing |
| title_short | Analytical model for predicting time-dependent lateral deformation of geosynthetics-reinforced soil walls with modular block facing |
| title_sort | analytical model for predicting time dependent lateral deformation of geosynthetics reinforced soil walls with modular block facing |
| topic | Geosynthetics Creep behavior Geosynthetics-reinforced soil (GRS) walls Lateral deformation Analytical model |
| url | http://www.sciencedirect.com/science/article/pii/S1674775523001865 |
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