Effects of variable preloading on prefabricated vertical drain (PVD) improved ground with electro-osmotic consolidation and piezometric drawdown | |
| Author | Dolrerdee Hormdee |
| Call Number | AIT Thesis no. GE-01-11 |
| Subject(s) | Clay--Thailand--Bangkok Electro-osmosis |
| 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-01-11 |
| Abstract | The present study aims to analyze and evaluate the ground improvement by using prefabricated vertical drain (PVD) for the Landside Road System at the Second Bangkok International Airport (SBIA) and at the AIT campus. The effects of using different load levels during preloading on PVD improved ground were evaluated. The effects of electroosmosis (EO) on water content, Atterberg Limits, and shear strength were determined in the details. Electro-osmotic (EO) consolidation can affect the settlement time curve by increasing the rate of the consolidation from 1.6 to 1.9 and 1.7 to 2.6 times faster than that using PVD only for both undisturbed and reconstituted soil samples, respectively. The magnitudes of settlement generated using electro-osmotic consolidation were in order of 1.2 to 1.4 and 1.4 to 2.6 times higher than using PVDs only for undisturbed and reconstituted samples, respectively. The simulation of the effects of electro-osmotic consolidation on compressibility parameters was also investigated by oedometer tests. For the SBIA site, the geoteclmical data was used to predict the settlements using PVD-SD computer software and were compared with the observed results as well as the compressibility parameters back-calculated by PVD-SD program. The compressibility parameters obtained by the method of Asaoka were compared agreed well with the backcalculated values. The observed and predicted surface settlement and coefficient of horizontal consolidation are in good agreement for multi-layer PVD improved ground. The recharging of the piezometric level drawdown by using PVD installation was observed by the field monitoring in the AIT campus as well as at SBIA. |
| Year | 2002 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. GE-01-11 |
| 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, D. T.; |
| Examination Committee(s) | Noppadol Phien-wej;Takemura, Jiro; |
| Scholarship Donor(s) | Royal Thai Government (RTG); |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2002 |