Full scale behavior of SDCM piles under axial and lateral loading with simulations | |
| Author | Weeraphol Shinwuttiwong |
| Call Number | AIT Thesis no.GE-07-04 |
| Subject(s) | Piling (Civil engineering) Soil-cement construction Soil stabilization--Thailand--Bangkok--Testing |
| Note | A thesis submitted in partial fulfillment of requirements for the degree of Master of Engineering in Geotechnical and Geoenv ironmental Engineering,School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. GE-07-04 |
| Abstract | A new composite pile, a deep cement mixing (DCM) pile with a reinforced concrete pile core at its center, named stiffened deep cement mixing (SDCM) pile is introduced for supporting axial and lateral loads in soft Bangkok clay. A total of 4 DCM piles and 16 piles were constructed in the field. The DCM piles have 0.6 m diameter and 7 m long. The reinforced concrete core consisted of 0.18xO.18 m and 0.22xO.22 m with 4 to 6 m long. Field load test data, which consisted of axial load test and lateral load tests on DCM and SDCM piles, have been presented. The SDCM piles significantly increased the axial bearing capacity up to 2 times compared to DCM piles and the concrete core carried around 60% of the applied load. In SDCM pile, the longer concrete core pile has small settlement and the larger cross-sectional area have higher load bearing capacity. The lateral load bearing capacity of SDCM piles were 9 to 11 times that of DCM piles. The bigger section area of concrete core pile has higher lateral load bearing capacity and smaller lateral displacement. The field tests were simulated using a commercially available finite element program, PLAXIS 3D FOUNDATION, in order to back-calculate the appropriate parameters. The finite element simulation was also utilized to find out the load transfer between the concrete core and the surrounding DCM in the SDCM pile. The simulations indicate that the length and size of the concrete core pile may not influence the location of the cracks or maximum bending moments. Moreover, the interface friction between the DCM and concrete core pile in the field were lower than in the laboratory test as expected. |
| Year | 2008 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. GE-07-04 |
| 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) | Dennes T. Bergado; |
| Examination Committee(s) | Noppadol Phien-Wej;Park, Kyung-Ho; |
| Scholarship Donor(s) | His Majesty the King of Thailand); |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2007 |