Measured vs. predicted settlements and pullout capacity in full scale reinforced embankment on DJM piles | |
| Author | Teerawat Duangchan |
| Call Number | AIT Thesis no.GE-02-07 |
| Subject(s) | Embankments Reinforced concrete |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. GE-02-07 |
| Abstract | Full scale embankment with PVC-coated hexagonal wire mesh and vertical precast concrete facing was earlier constructed on soft clay improved by jet grouted soilcement (DJM) method with a total height of 6.0 meters, near the EGAT Power Station site in Ayutthaya, Thailand. To investigate the behavior and the performance of full-scale embankment test, additional laboratory and in-situ tests of subsoil foundation were carried out. The behavior of the embankment was also monitored after construction. The maximum pore pressure occurred at 2 to 3 days after construction and seemed to occur at a very quick rate and subsequent dissipation afterwards. The maximum lateral outward movement of the wall face occurred at the top amounting to 249 mm at 374 days after the end of the construction. In the foundation subsoil, the maximum lateral movement up to 51 mm occurred at 3.0 to 4.5 m depth corresponding to the weakest zone of the soft foundation as manifested by the results from the field vane shear tests. The average of surface settlements on ground and on piles are 327 mm and 277 mm, respectively. The differential settlement between on pile and on ground was found to be 50 mm (5% to 20% of the average settlement). The average subsurface settlement at 3.0 m and 6.0 m about 244 mm and 71 mm, respectively. The degree of consolidation of the soft subsoil foundation during the same period was 84% by using Lorenzo and Bergado (2003) method. The predicted settlement on ground from Lorenzo and Bergado (2003) method and from Asaoka's method agreed well with the field monitoring from full scale embankment test. From pullout test results, the maximum pullout resistance in the laboratory are slightly higher than the field pullout resistance because the laboratory test has smaller scale and the compaction and moisture contents in the laboratory can be better controlled. The laboratory pullout tests yielded peak pullout resistances at relatively lower displacements of the wire mesh reinforcements than in the field pullout tests. However, the load displacement curves showed similar trends for both the laboratory and field pullout tests. |
| Year | 2003 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. GE-02-07 |
| Type | Thesis |
| 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;Park, Kyung-Ho; |
| Scholarship Donor(s) | ASEAN Foundation.; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2003 |