DEVELOPMENT OF METHOD FOR EVALUATING DEGREE OF COMPACTION IN EXISTING EMBANKMENT BASED ON RESULTS OF CONE PENETRATION TEST ON COMPACTED SOIL WITH DIFFERENT ENERGY

The collapse of aged embankment has recently occurred owing to torrential rain. To prevent disaster due to such collapse, it is important to check the safety of the embankment. However, it is difficult to examine details of embankments because of cost and time constraints. Therefore, we aim for developing an inspection method which can be easily applied for a lot of embankments. The proposed method utilized dynamic cone penetration test for estimating the degree of compaction in the embankment. This paper describes the scheme of method for evaluating the degree of compaction of decomposed granite used as fill material in Chugoku region. Consequently the practical charts between the penetration resistance measured at a certain depth and the corresponding degree of compaction are established for different levels of compaction energy.