Experimental and numerical analysis of large scale pull out tests conducted on clays reinforced with geogrids encapsulated with coarse material |
| |
| Affiliation: | 1. Department of Civil Engineering, National Chi-Nan University, University Road, Puli, Nantou 545, Taiwan;2. Department of Civil and Construction Engineering, National Taiwan University of Science and Technology, 43, Sec. 4, Keelung Road, Taipei 106, Taiwan;3. Department of Soil Mechanics and Foundations, University of Technical Education, Ho Chi Minh City, Viet Nam;1. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, No. 1, Xikang Road, Nanjing 210098, China;2. College of Civil Engineering & Architecture, Shandong University of Science and Technology, No. 579, Qianwangang Rd., Huangdao, Qingdao, 266590, China;1. University of Qom, Bvd. Amin, Qom, Iran;2. Cnam Paris, 2, rue Conté, 75003, Paris, France;3. Grenoble Alpes University, LTHE, Grenoble, France;1. INSA Lyon, 34, avenue des Arts, 69621 Villeurbanne, France;2. Univ Grenoble Alpes, LTHE, F-38000 Grenoble, France;3. MENARD, 2, Rue Gutenberg, 91620 Nozay, France |
| |
| Abstract: | The pullout test is one of the methods commonly used to study pullout behavior of reinforcements. In the current research, large pullout tests (i.e. 100 × 60 × 60 cm) have been conducted to investigate the possibility of pullout resistance enhancement of clays reinforced with HDPE geogrid embedded in thin layers of sand. Pullout tests on clay–geogrid, sand–geogrid and clay–sand–geogrid samples have been conducted at normal pressures of 25, 50 and 100 kPa. Numerical modeling using finite element method has also been used to assess the adequacy of the box and geogrid sizes to minimize boundary and scale effects. Experimental results show that provision of thin sand layers around the reinforcement substantially enhances pullout resistance of clay soil under monotonic loading conditions and the effectiveness increases with increase in normal pressures. The improvement is more pronounced at higher normal pressures and an optimum sand layer thickness of 8 cm has been determined for maximum enhancement. Results of numerical analysis showed the adequacy of the box and geogrid length adopted as well as a relatively good agreement with experimental results. |
| |
| Keywords: | Geosynthetics Pullout test Numerical modeling Geogrid Clay and sand |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
