Performance of grouted and non-grouted bored piles in Bangkok subsoils | |
| Author | Apichai Wachiraprakarnpong |
| Call Number | AIT Thesis no.GT-92-08 |
| Subject(s) | Piling (Civil engineering)--Testing Grouting |
| 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. GT-92-08 |
| Abstract | The utilization of grouted bored piles in Bangkok subsoils is to solve the problem of soil loosening during boring (the grout hardens the soil) and to improve bearing capacity of the bored pile. This study describes the effect of base grouting and shaft grouting on the behavior of single bored piles, with respect to bearing capacity and vertical pile displacements. The analysis is conducted based on the load-settlement curves obtained from pile load tests and the load transfer curves interpreted from strain measurements in bored piles. The results show that the skin friction and the end bearing capacity of base grouted bored piles (with the pile tips seated in the first sand and the second sand layers) increase proportionally. However, only the skin friction is dominant for the base grouted bored pile with the pile tip seated in the second stiff clay layer. The effectiveness of the base grouting is to reduce the vertical displacement of bored piles in the range of the working load. The displacements at fully mobilized skin friction of the base grouted bored pile is higher than that of the non-grouted pile. The base grouting is very efficient when piles are seated in the first sand layer. Lateral pile load tests were carried out on two single piles, and on pile groups (with two piles and three piles) with pile size of 1.50 min diameter and 36.00 m in embedded length. The lateral pile tests were conducted under repeated loading similar to cyclic loading concepts. A comparison made between the predicted deflections based on Poulos’ method with the measured deflections for single piles, indicates that the predicted deflections are close to the measured values in the range of the working loads. In addition, the average soil modulus, Es is back calculated based on the deflections at working loads. |
| Year | 1993 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. GT-92-08 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Geotechnical and Transportation Engineering (GT) |
| Chairperson(s) | Balasubramaniam, A.S.;Noppadol Phien-Wej;Wanchai Teparaksa; |
| Examination Committee(s) | Bergado, Dennes T.;Honjo, Yusuke; |
| Scholarship Donor(s) | Government of Switzerland; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1993 |