Numerical simulation of settlements associated with driven piles in Bangkok clay | |
| Author | Wong, Yen Kiew |
| Call Number | AIT Thesis no.GT-90-13 |
| Subject(s) | Piling (Civil engineering)--Testing Clay--Thailand--Bangkok |
| 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. GT-90-13 |
| Abstract | A comprehensive test scheme to investigate the negative skin friction developed by embankment surcharge on instrumented piles has been carried out in Bangkok subs oil. Field performance is described and discussed in the thesis. Soil response during pile installation , subsequent consolidation and pile loading has been numerically analysed using the finite element technique. Pile driving and subsequent consolidation have been modelled by undrained cylindrical cavity expansion method (CEM) coupled with critical state theory and Biot's consolidation theory, respectively. The predicted values of excess pore water pressure during pile driving are compared with the field measurements. Changes in total and effective stresses, stress path characteristics, and smeared zones due to pile installation are also investigated. The development of negative skin friction along the uncoated pile shaft is the primary part of the research, which is also numerically modelled. Th e ground settlement caused by the embankment surcharge is modelled by fully - coupled (Biot) consolidation theory incorporating the Modified Cam-clay model, while the pile-soil interface behavior is simulated by the thin- layer elements associated with non-linear elastic-plastic behavior. Subsequent predictions of surface settlement, axial load distribution and s kin friction along the pile shaft are compared with the available field measurements. The load-settlement response and the load-transfer behavior are investigated to obtain a better understanding of the development of negative s kin friction on uncoated driven piles. It is found that pile settlements are increasing significantly with the increase in s oil settlements. Due to the larger immediate settlement predicted by FEM, the negative skin friction is rapidly developed, and the compute d magnitude of negative skin friction is slightly greater than the actual measured data. A pile - settlement- controlled design criterion is also recommended conceptually for piles subjected to negative skin friction which is developed as a result of embankment surcharge in this region. |
| Year | 1991 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. GT-90-13 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Geotechnical and Transportation Engineering (GT) |
| Chairperson(s) | Indraratna, Buddhima |
| Examination Committee(s) | Honjo, Yusuke ;Balasubramaniam, A.S. |
| Scholarship Donor(s) | German Academic Exchange Service (DAAD) The Government of the Federal Republic of Germany ; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1991 |