ANALYTICAL STUDIES ON COST EFFECTIVE COUNTERMEASURES AGAINST DISPLACEMENT OF PILED BRIDGE ABUTMENT ON SOFT GROUND

This paper presents analytical studies on effective countermeasures against actual piled bridge abutment constructed on thick soft clay ground. After 13 years from the construction, unloading of embankment with the use of EPS (Expanded Poly-Styrol) was unavoidable to prevent further damage to surroundings. The effects of unloading timing was varied in the first stage of the analyses, then the applicability of FCB was studied by varying the unloading timing and area. Based on the assumed scenario of each countermeasure, effective countermeasures in terms of cost performance were discussed.