Evaluation of Geomembrane Effect Based on Mobilized Shear Stress due to Localized Sinking
Installing geosynthetic reinforcement at the bottom of the embankment will provide positive support for subgrade stability and settlement control, if there is a void or a weak foundation. In routine design work, the geomembrane effect must be well estimated and the tensile strain should be precisely...
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2019/4942578 |
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| author | Weihua Lu Yongxing Zhang Weizheng Liu Cheng Liu Haibo Wang |
| author_facet | Weihua Lu Yongxing Zhang Weizheng Liu Cheng Liu Haibo Wang |
| author_sort | Weihua Lu |
| collection | DOAJ |
| description | Installing geosynthetic reinforcement at the bottom of the embankment will provide positive support for subgrade stability and settlement control, if there is a void or a weak foundation. In routine design work, the geomembrane effect must be well estimated and the tensile strain should be precisely predicted. Conventional analytical methods often adopt the limit state method to calculate the overlying load on the deflected geosynthetic. However, this assumption does not necessarily apply to all conditions, especially when the foundation soil can provide certain resistance. In this study, a semiempirical prediction method for evaluating the geomembrane effect of the basal reinforcement was proposed, and an iterative solution for calculating tensile strains of a deflected geosynthetic was deduced. In derivation, a virtual inclined slip surface and interaction between the geosynthetic and soil were quantitatively evaluated by coupling the arching effect and the geomembrane effect. Moreover, the development of shear stress along the slip surface can be considered, as well as different segments of the basal reinforcement. Then, the proposed method was validated by two large-scale experiments. Comparison of the results of this method with measurements and results of other analytical models confirmed that this analytical method can take good care of the varying process of the localized sinking, regarding the overlying loads on the geosynthetic and the subsequent tensile strains. |
| format | Article |
| id | doaj-art-f1c5a33262e84394b8d2726dac539f57 |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-f1c5a33262e84394b8d2726dac539f572025-02-03T06:13:12ZengWileyAdvances in Civil Engineering1687-80861687-80942019-01-01201910.1155/2019/49425784942578Evaluation of Geomembrane Effect Based on Mobilized Shear Stress due to Localized SinkingWeihua Lu0Yongxing Zhang1Weizheng Liu2Cheng Liu3Haibo Wang4Associate Professor, School of Civil Engineering, Nanjing Forestry University, No. 159 Longpan Road, Nanjing, Jiangsu 210037, ChinaProfessor, Guangxi Key Laboratory of Disaster Prevention and Engineering Safety, Key Laboratory of Disaster Prevention and Structural Safety of Ministry of Education, Guangxi University, Nanning, ChinaAssociate Professor, School of Civil Engineering, Central South University, No. 22 Shaoshan South Road, Tianxin District, Changsha, Hunan 410075, ChinaAssociate Professor, School of Civil Engineering, Nanjing Forestry University, No. 159 Longpan Road, Nanjing, Jiangsu 210037, ChinaAssociate Professor, School of Civil Engineering, Nanjing Forestry University, No. 159 Longpan Road, Nanjing, Jiangsu 210037, ChinaInstalling geosynthetic reinforcement at the bottom of the embankment will provide positive support for subgrade stability and settlement control, if there is a void or a weak foundation. In routine design work, the geomembrane effect must be well estimated and the tensile strain should be precisely predicted. Conventional analytical methods often adopt the limit state method to calculate the overlying load on the deflected geosynthetic. However, this assumption does not necessarily apply to all conditions, especially when the foundation soil can provide certain resistance. In this study, a semiempirical prediction method for evaluating the geomembrane effect of the basal reinforcement was proposed, and an iterative solution for calculating tensile strains of a deflected geosynthetic was deduced. In derivation, a virtual inclined slip surface and interaction between the geosynthetic and soil were quantitatively evaluated by coupling the arching effect and the geomembrane effect. Moreover, the development of shear stress along the slip surface can be considered, as well as different segments of the basal reinforcement. Then, the proposed method was validated by two large-scale experiments. Comparison of the results of this method with measurements and results of other analytical models confirmed that this analytical method can take good care of the varying process of the localized sinking, regarding the overlying loads on the geosynthetic and the subsequent tensile strains.http://dx.doi.org/10.1155/2019/4942578 |
| spellingShingle | Weihua Lu Yongxing Zhang Weizheng Liu Cheng Liu Haibo Wang Evaluation of Geomembrane Effect Based on Mobilized Shear Stress due to Localized Sinking Advances in Civil Engineering |
| title | Evaluation of Geomembrane Effect Based on Mobilized Shear Stress due to Localized Sinking |
| title_full | Evaluation of Geomembrane Effect Based on Mobilized Shear Stress due to Localized Sinking |
| title_fullStr | Evaluation of Geomembrane Effect Based on Mobilized Shear Stress due to Localized Sinking |
| title_full_unstemmed | Evaluation of Geomembrane Effect Based on Mobilized Shear Stress due to Localized Sinking |
| title_short | Evaluation of Geomembrane Effect Based on Mobilized Shear Stress due to Localized Sinking |
| title_sort | evaluation of geomembrane effect based on mobilized shear stress due to localized sinking |
| url | http://dx.doi.org/10.1155/2019/4942578 |
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