A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Civil Engineering

Thesis (M.Eng.) - Asian Institute of Technology

A lot more pile load test results on Bangkok subsoils have recently been available following a rapidly development of big-rise buildings in the recent past. An attempt was made in this study to review and update parameters to be used in the static limit equilibrium analysis based on this new set of data and those used for previous work. Screening was made on the data set used in previous study data which did not have tests be carried out to the ultimate load or did not have tests be carried out to the ultimate load or did not have proper subsoils data were screened out.. Data The data are classified into 3 groups: (i) instrumented bored piles, (ii) driven piles, bored piles, and auger press piles, and (iii) non-pollution piles, steel-H piles, and steel pipe piles. They were analyzed with respect to capacity and settlement characteristics. For bored piles, adhesion factors were proposed and earth pressure coefficient Kg was closed to 1.1 K0 and 0.73 K0 for the 1st sand layer and the 2nd sand layer respectively where Ko is earth pressure coefficient at lest. When only load-settlement curves were available, trial-and-error method was introduced and showed improper results. Base grouting on bored pile increase in both end bearing capacity and skin :friction capacity. Improvement of skin friction of non-pollution piles is obviously seen. Skin friction of steel piles coincides the design curve proposed by TOMLINSON (1969). Plots of normalized load-settlement at failure have a remarkable trend.