Abstract
Structures constructed on soft ground have often suffered from serious problems related to large ground deformation. Load reduction or strengthening surrounding soil may be effective countermeasures against these problems. This paper deals with numerical analyses of an existing embankment which have suffered from these problems since the beginning of construction, and where reduction of embankment load by EPS was made. This paper reveals the difficulty to estimate the current situations and the degree of safety of structures even detailed observation and numerical analyses were made. The paper also shows the difficulty to predict future behaviour of structures after maintenance work, and that this issue should be more focused by engineer.
