การวิเคราะห์เพื่อการออกแบบการเสริมความมั่นคงของคันดินทางรถไฟ

Abstract

The railway embankment in the northern part of Thailand was constructed from local clayey soil which loses its strength considerably in flooded condition. This can lead to embankment deformation, excessive railway track irregularity and low riding allowable train speed. The situation is getting worse particularly in the rainy season. Thus, the check is needed on a regular basis as routine maintenance to ensure safety.  This investigation aims to study the causes and mechanisms of the soil stability problem so that appropriate countermeasures can be suggested. This includes field investigation, laboratory testing, and limit equilibrium slope stability analysis using KU Slope program. The results presented conclusions could be drawn with respect to improper soil properties under wheel rail forces.  The study recommends the use of retaining soil gabion box for stability purposes.