Methods for prioritizing cut slope management for weathering

Abstract

Recently, surface collapse of cut slopes often occurs during heavy rains. To prevent this, it is necessary to understand the weathering of the ground and improve the durability of the cut slope. In this study, the applicability of the proposed weathering evaluation method was confirmed based on the results of elastic wave exploration that have continued for 40 to 50 years on cut slopes of expressways. As a result, the thickness of the weathered zone tends to be underestimated when the rock crack develops to the deep part. It was shown that this method can roughly evaluate the layer thickness and stability of the weathered zone, and it can be used as an index for judging management priority.