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Behavior and stability of a large-scale cut slope considering reinforcement stages. Landslides (2009) 6:pp263–272 Gi-Chun kang . Young-Suk Song . Tae-Hyung Kim. 授課老師 : 林昭遠老師 學號 : 79842019 報告人 : 陳則佑. 大綱. 前言 研究區域概述 原理與方法 結果與討論 邊坡穩定分析 結論. 前言. - PowerPoint PPT Presentation
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Behavior and stability of a large-scale cut slope considering reinforcement stages
授課老師授課老師 :: 林昭遠老師林昭遠老師學號學號 ::7984201979842019報告人報告人 :: 陳則佑陳則佑
Landslides (2009) 6:pp263–272Gi-Chun kang . Young-Suk Song . Tae-Hyung Kim
前言
韓國,山區覆蓋約 70%的土地總面積。許多崩塌經常發生在施工階段,嚴重影響人為安全和財產損失 ; 因此須設計適當的對策,減少邊坡破壞使災害影響減低至最小程度。
本研究利用穩定樁、土釘和地錨加強邊坡穩定,並在不同的施工階段進行數值分析和實地監測。
材料 施工方法與功用
穩定樁 鋼管樁,長度為 508mm直徑H 型鋼250×255×14×14
1.將鋼管樁入岩,深度為 1.5m。2.H型鋼插入鋼管樁。3.樁頭使用水泥灌漿,防止腐蝕,增 加穩定度。4.間隔為 1.5m。
地錨 自由端 21m固定端長 8m角度為 30°
1.抑制穩定樁頭。2.間隔為 1.5m。
土釘 長度為 12m,角度為 30°
縱向和橫向間距為 1.5m 。
排水孔 直徑 75mm 防止地下水水位上漲,引起滲水。
本研究使用 SLOPILE(v3.0) 進行邊坡穩定分析。
SLOPILE 利用無限邊坡的原理基於 Fellenius 和Bishop 簡化方法量測平面破壞和圓弧破壞。
邊坡穩定分析
SLOPILE 流程圖
結論• The deflection of piles was increased gradually as the reinforcement work processed. Also, the maximum deflection and bending stress of
piles were measured at the part of colluvial soils including the silty clay layer.
• The most critical stage among the reinforcement stages was the soil-nailing work stage. This increasing of pile deflection was influenced by the excavation before installing soil nails. 。
• The safety factor of the slope gradually tends to increase subjected to reinforcement stages. The safety factor was rapidly increased after installing piles in the upper part, and that was increased gradually in the lower part. The safety factors are satisfied with the allowable sta-ndard value in both dry and rainy conditions.
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