期刊
GEOTEXTILES AND GEOMEMBRANES
卷 47, 期 3, 页码 389-401出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.geotexmem.2019.01.006
关键词
Geosynthetics; Column-supported embankment; Soil arching; Modulus ratio; Stress ratio; Axisymmetric modelling
资金
- Macau Science and Technology Development Fund (FDCT) [125/2014/A3]
- National Natural Science Foundation of China [51508585, 51678319]
- University of Macau Research Fund [MYRG2017-00198-FST, MYRG2015-00112-FST]
- Marie Sklodowska-Curie Actions Research and Innovation Staff Exchange programme [778360]
- Marie Curie Actions (MSCA) [778360] Funding Source: Marie Curie Actions (MSCA)
Soil arching effect results from the non-uniform stiffness in a geosynthetic-reinforced and column-supported embankment system. However, most theoretical models ignore the impact of modulus difference on the calculation of load transfer. In this study, a generalized mathematical model is presented to investigate the soil arching effect, with consideration given to the modulus ratio between columns and the surrounding soil. For simplification, a cylindrical unit cell is drawn to study the deformation compatibility among embankment fills, geosynthetics, columns, and subsoils. A deformed shape function is introduced to describe the relationship between the column and the adjacent soil. The measured data gained from a full-scale test are applied to demonstrate the application of this model. In the parametric study, certain influencing factors, such as column spacing, column length, embankment height, modulus ratio, and tensile strength of geosynthetic reinforcement, are analyzed to investigate the performance of the embankment system. This demonstrates that the inclusion of a geosynthetic reinforcement or enlargement of the modulus ratio can increase the load transfer efficiency. When enhancing the embankment height or applying an additional loading, the height of the load transfer platform tends to be reduced. However, a relatively long column has little impact on the load transfer platform.
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