Study on Construction Cost Saving of Pile Foundation Using Pile Load Test For Design

In the design standard for structure foundation prepared by the ministry of construction, it is recommended as the best way that ultimate pile capacity is determined in the static pile load test for design purpose. But, in real design of pile foundation, the presumptive design by the static bearing capacity equation is commonly being used. As a part of studies to improve the above-mentioned habitual designs of pile foundation design and generalize the design method of pile foundation utilizing static pile load test for design purpose, the foundations of two piers (p16 and p17) of the second Pusan Grand bridge were designed after performing the static pile load test for design purpose. Construction method for pile foundations was selected, construction specification and driving specification for pile foundations were determined. and, also, construction cost saving was researched, based on the results of the static pile load test with load transfer test for design purpose, which has not been made in the domestic construction work. It was expected that the drilled shaft foundations (1st choice) and the steel pipe pile foundation (2nd choice) designed by the static pile capacity equation were needed much more construction costs by at least 346% and 55%, respectively, than the steel pipe pile(3rd choice) designed by utilizing the static pile load test results for design purpose.