Mechanical analysis of fixed geosynthetic technique of GRPS embankment
来源期刊：中南大学学报(英文版)2013年第5期
论文作者：ZHANG Jun(张军) ZHENG Jun-jie(郑俊杰) MA Qiang(马强)
文章页码：1368 - 1375
Key words：mechanical model; load transfer mechanism; fixed geosynthetic technique; GRPS embankment; field test
Abstract: To overcome the deficiencies of conventional geosynthetic-reinforced and pile-supported (GRPS) embankment, a new improvement technique, fixed geosynthetic technique of GRPS embankment (FGT embankment), was developed and introduced. Based on the discussion about the load transfer mechanism of FGT embankment, a simplified check method of the requirement of geosynthetic tensile strength and a mechanical model of the FGT embankment were proposed. Two conditions, the pile cap and pile beam conditions are considered in the mechanical model. The finite difference method is used to solve the mechanical model owing to the complexity of the differential equations and the soil strata. Then, the numerical procedure is programmed. Finally, a field test is conducted to verify the mechanical model and the calculated results are in good agreement with field measured data.
ZHANG Jun(张军)1, ZHENG Jun-jie(郑俊杰)2, MA Qiang(马强)2
(1.Key Lab of Highway Construction and Maintenance Technology in Loess Region, Shanxi Transportation Research Institute, Taiyuan 030006, China;
2. Institute of Geotechnical and Underground Engineering, Huazhong University of Science and Technology, Wuhan 430074, China)
Abstract:To overcome the deficiencies of conventional geosynthetic-reinforced and pile-supported (GRPS) embankment, a new improvement technique, fixed geosynthetic technique of GRPS embankment (FGT embankment), was developed and introduced. Based on the discussion about the load transfer mechanism of FGT embankment, a simplified check method of the requirement of geosynthetic tensile strength and a mechanical model of the FGT embankment were proposed. Two conditions, the pile cap and pile beam conditions are considered in the mechanical model. The finite difference method is used to solve the mechanical model owing to the complexity of the differential equations and the soil strata. Then, the numerical procedure is programmed. Finally, a field test is conducted to verify the mechanical model and the calculated results are in good agreement with field measured data.
Key words:mechanical model; load transfer mechanism; fixed geosynthetic technique; GRPS embankment; field test
