Abstract: This paper presents the case studies of static loading test results of 65 rock socketed drilled shafts. The bedrock types for the rock sockets were sedimentary rock consisting of limestone, mudstone and shale. The static load test results are compiled into a database for the evaluation of the adequacy of the current empirical method for estimating the side friction of the rock socket. By comparing the test results and various empirical prediction methods, two methods are found to be appropriate: segmental linear prediction and square root methods. It is concluded that the segmental linear prediction method is dependent on the bedrock and the unconfined compressive strength of the intact rock.

Key words: Geotechnical Engineering, Rock Socketed Drilled Shafts, Side Friction, Unconfined Compressive Strength