성토층 하부의 자갈층 유·무에 따른 침투특성 변화
Seepage Characteristics of Embankment as with/withoutGravel Layer under the Earth Fill
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Abstract
A series of laboratory tests was carried out for analyzing of seepage characteristics of two-layers embankment model which consists of gravel and earth fill layers. Gravel layers were built under the earth fill for a half and one-third width of earth fill of the model. Permeability of earth fill was ranged between ～ m/s. The tests were performed with hydraulic gradients(), 0.10～0.55. From the test results, hydraulic head of earth fill with gravel layer was 1.6 times higher than that of earth fill without gravel layer. Seepage rate was increased up to 4～22 times and safety factor for piping was decreased to 13～43 % comparing the earth fill with gravel layer to that without gravel layer. The gravel layer under the earth fill could, in general, give some serious seepage problems to seadike embankment.
참고문헌 (11)
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