| Author | Chanarop Vichalai |
| Call Number | AIT Thesis no.GE-05-14 |
| Subject(s) | Soil surveys--Thailand--Geophysical methods
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| 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-05-14 |
| Abstract | The The procedure adopted in this study is as follows: in the first stage, the natural ground is investigated to see the response in the case without any buried object. In the second stage, a number of existing buried facilities in the AIT campus are investigated, including water concrete pipe, water steel pipe, communication cable line and concrete pavement. In the last stage, new objects (or called geophysical models) are constructed, including steel and plastic drums and steel tank, and the geophysical tests were made over the location of these newly constructed objects. Three geophysical methods were employed in this study, including electric imaging, seismic refraction and ground penetration radar. As a.part of the thesis work, geotechnical and geophysical tests in laboratory program were done on the samples taken from a borehole drilled at one of the testing sites in the AIT campus. Laboratory tests include water content, Atterberg's limits, total unit weight, pH, electric resistivity, and electric conductivity. Some correlation relationships between these parameters were attempted. Investigations of the natural ground have been done at 4 sites on the AIT Campus using EI, refraction and GPR techniques. El survey was carried out with mini-arrays to detect the water table below the ground surface, which was found at 1.2 m depth. A combined application of El and GPR was done to investigate the existing buried facilities such as the steel pipes, communication line and concrete pipe. While the El responses are well defined for all of these, the GPR response is clear only in the case of steel pipes but not that clear in other situations, probably due to attenuations of the GPR signal in the soft clays. Forward modeling and field tests were performed before and after construction of new objects, respectively at the two sites. The field responses of El over these new objects are still not clear due to disturbance caused to the soil due to excavation works. To improve this activated EI procedure was used and could map the steel tank better. It is expected that more works be done and a set of diversified geophysical models be installed. It is recommended that a database of the old and new models be developed to help managing the geophysical test sites. |
| Year | 2005 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. GE-05-14 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Geotechnical Engineering (GE) |
| Chairperson(s) | Noppadol Phien-wej; Pham Huy Giao |
| Examination Committee(s) | Park, Kyung-Ho |
| Scholarship Donor(s) | Royal Thai Government Fellowship |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2005 |