Abstract
This paper reports the results of dynamic observations of applying a low-improvement-ratio ground improvement method with gravel foundation reinforcement as a measure against soft ground when constructing a high embankment with a planned height of about 16 m on peat ground. Even when constructing an embankment on peat ground, gravel foundation reinforcement supports the embankment load as if it were a simple beam supported by the improvement, suppressing long-term settlement and deformation of the surrounding ground, which had previously been problematic. Significant fluctuations in groundwater levels were not observed during or after construction of the embankment. The results confirm that this method is highly effective for stabilizing embankments on peat ground and suppressing deformation of the surrounding soil, while having little impact on the groundwater environment around the embankment.