PROPOSAL FOR COUNTERMEASURE BY USIING GEOSYNTHETICS AGAINST EROSION FOR BACK-FILL OF ABUTMENT DUE TO FLOODING

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  • 河川増水による橋台背面盛土の侵食に対するジオシンセティックス材料による対策工の提案
  • カセン ゾウスイ ニ ヨル キョウダイ ハイメン モリツチ ノ シンショク ニ タイスル ジオシンセティックス ザイリョウ ニ ヨル タイサクコウ ノ テイアン

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Abstract

The back-fill of abutment was eroded and a road collapse occurred due to Hokkaido heavy rain disaster in 2016. In this study, the open channel experiment was conducted to observe the basic erosion process of the back fill of the abutment during flowing water condition. In addition, From the results of the model test, the erosion of the embankment advanced at the boundary of the structure of the abutment and the embankment. In the two countermeasures using the geosynthetics material adopted in this experiment, no collapse of the road surface occurred.

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