Abstract: The axial capacity of rock socketed piles is obtained through static load test and code estimation methods. This paper summarizes the estimation formulas for rock socketed piles in various industry codes in China. The experience parameters that affect the accurate estimation and application of the formulas as well as the difference of these code methods are also analyzed in the paper. Then, the other research results are summarized, i.e., considering avoiding the use of empirical parameters and applying statistical analysis methods, obtaining empirical formulas for the limit side resistance and end bearing resistance. Finally, the research results of Lu Xianlong et al. are discussed, mainly focusing on the important parameter estimation formulas of the limit side resistance coefficient and end bearing resistance coefficient, which are compared and analyzed with the other results, showing that the estimated results are generally lower than the estimated values of the empirical formula obtained by previous research. The estimated results are generally conservative. Finally, the research results of Lu Xianlong et al. are discussed through an engineering case study with the accuracy and rationality of using their results to estimate the axial capacity of rock socketed piles in mountainous areas and unsuitable pile areas.

Key words: Rock Socketed Piles, Axial Capacity, Empirical Parameter, Ultimate Side Resistance Coefficient, Ultimate End Bearing Resistance Coefficient