Evaluation of mechanical properties of sand compaction pile using cone penetration test | |
| Author | Priyankara, Nadeej Hansaraj |
| Call Number | AIT Thesis no.GE-02-12 |
| Subject(s) | Sand Testing Compacting |
| 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-02-12 |
| Abstract | Increasingly civil engineering structures and infrastructures are to be built in an area where the existing ground conditions are not very satisfactory. Sand compaction piles (SCP) are very useful to improve the properties of soft soil to withstand the structural load. Strength parameters of SCP normally evaluated using standard penetration test (SPT). Empirical equations, which were derived from numerous data obtained from uniform sandy ground, are adopted for evaluating the angle of internal friction ¢' of SCP. However SCP improved ground is quite different from the uniform sandy ground. Therefore validity of these empirical equations is questionable. Therefore it is necessary find out new reliable method to evaluate strength parameters of SCP. Due to simplicity, speed, continuous profiling and amenability to theoretical modeling, Cone penetration test (CPT) can be used to evaluate ¢' of SCP. In this research study theoretical model was developed by using cavity expansion theory to analysis the cone penetration resistance of sand in the SCP. The sand was modeled as an elastic-plastic material with a plastic zone in the SCP and considering the spring action given by the surrounding clay to transfer the confining stress to the SCP. In addition stress dependency of stiffness and volumetric strain were carried out. It was found that dependency of cavity pressure on low volumetric strain is very high compared with that of higher volumetric strain. There were some difference observed in cavity pressure between laboratory test results and analytical results for higher confining stress due to decrease of angle of internal friction with increasing confining pressure. The comparison of centrifuge test results and analytical results are also presented in this report. |
| Year | 2003 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. GE-02-12 |
| 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) | Takemura, Jira; |
| Examination Committee(s) | Bergado, Dennes T.;Park, Kyung-Ho ; |
| Scholarship Donor(s) | The Government of Japan; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2003 |