철도보강노반의 최적 말뚝 기초 시공 및 성능평가

초록

While constructing the reinforced subgrade for railways(RSR), settlement of soft ground under embankment has negative effects to stabilization of embankment. Because of this, foundation construction method was studied that improving soft ground under embankment of RSR with cast-in-situ concrete pile. The 0.4m diameter cast-in-situ concrete piles were arranged in 1 row under concrete wall foundation of RSR. Length of piles varied according to thickness of soft layer to consider economic design. After constructing embankment of RSR, performance of foundation was Evaluated measuring settlement of ground and surface. During same measurement period, settlements were 3.57mm at ground and 2.77mm at surface. It is confirmed that cast-in-situ concrete piles have the effect of consolidation settlement reduction.