| Author | Lam Fung Lai, Philip |
| Call Number | AIT Thesis no.GT-84-19 |
| Subject(s) | Piling (Civil engineering)--Testing
|
| 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 |
| Abstract | This thesis deals with the investigation of the behaviour of the granular piles with different densities and different proportions of gravel and sand on soft clay. A total. of 13 granular piJ.es were installed with O .3 m in diameter and about 8 m in length using the non-displacement method with 1.2 m in spacing and triangular pattern. Four active piezometers and two dummy piezometers were instilled for monitoring the pore water pressure changes during installation of granular piles. The soil properties before and after the installation of granular piles were investigated by in-situ vane shear tests and pressuremeter tests. Finally, the ultimate .Load of each granul.ar pile was determined by loading test. All of the granular piles were classified into five groups. The group 1, group 2 and group 3 were only consisted of sand with LO, 15 and 10 b1ows per compacted layer and the group 4 and were consisted or gravel mixed with sand in the proportion of 1 : 0 .3 by volume and grave1both 15 blows per compacted layer, respectively. For comparing with the group 1, group 2 and group 3 granular pile , it was found that the group 1 granular pile al most reaches the maximum density and gave the highest ultimate Load (3.25 tons to 3.50 tons) . Moreover, it was also found that the group 5 granular pile gave the highest ultimate load (3.50 tons to 3.75 tons) for comparing with the group 2 , group 4 and group 5 granular pile. It was found that gravel was the most efficient material tor granular pile construction. The predicted ultimate load obtained from pressuremeter test results method after HUGHES et al (1975) gave satisfying agreement with the experimental. data. Load-settlement curve from MATTES & POOLU5 (1969) analysis aid not reproducer the actual behaviour of the granular pile, especially at higher load level. However, using the pressuremeter results proposed oy HUGHES et al (1975) resulted in a similar trend as the observed load-settlement curves. The maximum bulging occurred about on e pile diameter below the top of the granular pile which gave a close agreement proposed by HUGHES et al (1975). There was insignificant change of the soil strength in weathered clay due to the installation of granular piles, on the other hand, the undrained shear strength was decreased by about 15% tor the soft clay. The negative excess pore water pressure was due to angering and it changed to positive value due to the compaction to granular pile during pi1e installation. |
| Year | 1985 |
| 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) | Bergado, Dennes T. |
| Examination Committee(s) | Balasubramaniam, A.S. ;Chandra, Sarvesh |
| Scholarship Donor(s) | Marden Family |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1 |