Behavior of reinforced wall/embankment using various reinforcements and facing systems | |
| Author | Sowarapan Duangkhae |
| Call Number | AIT Diss. no.GE-12-03 |
| Subject(s) | Concrete walls Embankments Reinforced concrete |
| Note | A dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Engineering in Geotechnical and Earth Resource Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Dissertation ; no. GE-12-03 |
| Abstract | Full scale and fully instrumented mechanically stabilized earth (MSE) wall/embankment was constructed in Phitsanulok Province in Thailand to study the performances of the polymer and metallic reinforcements on hard ground foundation. On the side of sloping side slopes (70 degrees from horizontal), polymeric geogrids were used consisting of polyester (PET), polypropylene (PP) and high density polyethylene (HDPE). At the other side with vertical facing, metallic reinforcements consisting of metallic strips (MS) and steel wire grids (SWG) were used. This dissertation comprised mainly three parts. First, laboratory and field tests thatdetermine in-situ soil parametersand index properties, index properties of backfill material, parameter for the backfill soil-reinforcement interactionand properties of 5 reinforcementmaterials.The laboratorytests consist of large pullout test, large direct shear test, Atterberg’s limit test, sieve analysis test, direct shear test, consolidation test, triaxial (CU) testand tension test. Second, the construction, instrument monitoring and data analysesof full scale Mechanical Stabilized Earth (MSE) Wall/Embankment in orderto understand thestability and deformation behavior of MSE Wall/Embankmenton hard foundation. Third, the subsequent numerical simulations as well asanalyses usingthe limit equilibrium methods and the K-stiffness working stress methods.Numerical modeling by FEMusing PLAXIS program in 2D and 3Dwere performed. Analyses from 2D simulationsslightly overpredictedthe measured data in the upperhalf of the embankment but showed good agreement in the lowerhalf. On the other hand, the results from 3D simulationsdemonstratedthe good agreement with the measured data throughout the embankment. The values ofthe reinforcement loads predicted by thelimit equilibrium methods (AASHTO Simplified and FHWA Structure Stiffness Methods) were compared with the corresponding values from the working stress methods called K-stiffness method (Original and Modified K-stiffness mehods). Moreover, the predictions from the K-stiffness methods were confirmed from the observed data for reinforced embankment on hard foundation. In addition, since the reinforcement loads increased due to post-construction settlements for reinforced embankments on soft foundation, further modifications of K-stiffness method wasproposed. This further modification concerned with the addition ofsettlement factor (Фs). The validity of this further modification wasdemonstrated by the good agreement between the maximum measured reinforcement loads and the recalculated maximum reinforcement loads using thefurther modified K-stiffness method. |
| Year | 2013 |
| Corresponding Series Added Entry | Asian Institute of Technology. Dissertation ; no. GE-12-03 |
| Type | Dissertation |
| School | School of Engineering and Technology (SET) |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Geotechnical Engineering (GE) |
| Chairperson(s) | Bergado, Dennes T.; |
| Examination Committee(s) | Noppadol Phien-wej ;Pham Huy Giao ;Hadikusumo, B.H.W. Yongyuth Taesiri; |
| Scholarship Donor(s) | Department of Highways, Thailand; |
| Degree | Thesis (Ph. D.) - Asian Institute of Technology, 2012 |