沢埋め盛土を対象とした簡易安定性評価手法の提案とその検証事例

摘要

In this paper, a simple cost-effective method for evaluating the stability of existing embankment is proposed. This proposed method would facilitate engineers to identify unstable embankments, and also to provide valuable information to select an appropriate countermeasure. This proposed method is comprised of surface geological exploration, dynamic cone penetration test, vibro-cone sampling, and simple stability analysis. Based on a couple of case studies, it is manifested that the proposed method provides a factor of safely, being slightly lower than that from the conventional method for detailed investigation, implying the adequacy when using the proposed method for screening aseismic stability of embankments. It is also suggested that the application of the proposed method would be greatly enhanced when the strength of fill material as well as the water level in the fill are both properly estimated.