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Journal of the Korean Society of Hazard Mitigation 2004;4(3):25-32.
Published online September 30, 2004.
철도사면파괴 원인 및 대책공법 적용을 위한 강도정수 결정
이승현, 김병일
Cause of Rall Road Slope Failure and Determination of Soil Strength for Remedy
Seung-Hyun Lee, Byoung-Il Kim
Abstract
Rail road slope can be fatted because of existence of unexpected soft subsoil. Purpose of this study is verifying the cause of rail road slope failure and determination of soil strength for remedy. Drilling some boreholes, cone penetration test and field vane test were executed in order to find out the cause of slope failure. In addition, laboratory test was conducted in order to determine soil strength of soft soil sampled as undisturbed state. As a result of both the in-situ and the laboratory tests, the cause of slope failure is thought to be propagation of failure zone by progressive rupture of overconsolidated clay Soft soil strength was determined through back analysis of the failed slope.
Key Words: cause of slope failure; in-situ tests; progressive rupture; back analysis
요지
철도사면은 예상치 못한 연약지반의 존재로 인해 붕괴될 수 있다. 이 연구는 철도사면의 파괴원인을 규명하고 대책공법 적용을 위한 강도정수를 결정하는데 그 목적이 있다. 사면파괴의 원인을 파악하기 위하여 시추조사, 콘관입시험, 현장베인시험 등이 수행되었다. 또한 연약지반의 강도정수를 구하기 위해 불교란상태로 시료를 채취하여 실내시험을 수행하였다. 현장원위치시험 및 실내시험 결과 사면 파괴의 원인은 과압밀점토의 점진적 파괴에 따른 연약지반 강도저하영역의 전파에 기인한 것으로 밝혀졌다.
핵심용어: 사면파괴의 원인; 현장원위치시험; 점진적인 파괴; 역해석
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