Performance of fixed geosynthetic technique of GRPS embankment
来源期刊：中南大学学报(英文版)2013年第8期
论文作者：ZHANG Jun(张军) ZHENG Jun-jie(郑俊杰) MA Qiang(马强)
文章页码：2245 - 2254
Key words：geosynthetic-reinforced and pile-supported embankment; fixed geosynthetic technique; numerical analysis; two-stage analysis method; soft soil
Abstract: Geosynthetic-reinforced and pile-supported (GRPS) embankment has been increasingly constructed in a large number of regions and for a wide range of projects in the past decades. However, many disadvantages are exposed through a lot of applications on conventional technique of GRPS embankment (called CT embankment), i.e., intolerable settlement and lateral displacement, low geosynthetic efficiency, etc. In view of these disadvantages, the fixed geosynthetic technique of GRPS embankment (called FGT embankment) is developed in this work. In this system, the geosynthetic is fixed on the pile head by the steel bar fulcrum and concrete fixed top. The principles and construction techniques involved in the FGT embankment are described firstly. Then, the numerical analysis method and two-stage analysis method are used to study the performance of FGT embankment, respectively. It is shown that the FGT embankment can provide a better improvement technique to construct a high embankment over soft ground.
ZHANG Jun(张军)1, ZHENG Jun-jie(郑俊杰)2, MA Qiang(马强)2
(1. Key Laboratory 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:Geosynthetic-reinforced and pile-supported (GRPS) embankment has been increasingly constructed in a large number of regions and for a wide range of projects in the past decades. However, many disadvantages are exposed through a lot of applications on conventional technique of GRPS embankment (called CT embankment), i.e., intolerable settlement and lateral displacement, low geosynthetic efficiency, etc. In view of these disadvantages, the fixed geosynthetic technique of GRPS embankment (called FGT embankment) is developed in this work. In this system, the geosynthetic is fixed on the pile head by the steel bar fulcrum and concrete fixed top. The principles and construction techniques involved in the FGT embankment are described firstly. Then, the numerical analysis method and two-stage analysis method are used to study the performance of FGT embankment, respectively. It is shown that the FGT embankment can provide a better improvement technique to construct a high embankment over soft ground.
Key words:geosynthetic-reinforced and pile-supported embankment; fixed geosynthetic technique; numerical analysis; two-stage analysis method; soft soil
