Centrifuge modeling of anti-slide piles with anchored bolt-reinforced slopes under drawdown conditions
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摘要: 锚杆抗滑桩是一种加固边坡的有效结构。本文进行了水位下降条件下素土坡与锚杆抗滑桩组合结构加固土坡的离心模型试验，测量了边坡的位移场变化，分析了锚杆抗滑桩的行为以及土体的变形特性。试验结果表明，锚杆抗滑桩加固导致边坡位移显著减小、改变了滑裂面连续性，并使得坡体破坏表现出显著渐进性。水位下降条件下锚杆抗滑桩加固土坡的破坏过程与变形局部化表现出显著的耦合特性。锚杆抗滑桩结构使得边坡变形均匀化，阻挡了桩侧土体滑动，从而延迟了边坡破坏。Abstract: The anti-slide pile with anchored bolt is an effective structure for reinforcing side slopes. The centrifugal model tests are conducted to compare the unreinforced slope with the anchor-pile-reinforced one under drawdown conditions. The histories of displacement of slopes are measured. The behavior of the anti-slide pile with anchored bolt and the distribution of strain of soil are analyzed. The test results show that the anti-slide pile with anchored bolt significantly reduces the displacement of landslide, changes the continuity of slip surface and causes obvious progressive failure behavior. Under the drawdown conditions, the failure process of the anchor-pile-reinforced slope exhibits significant coupling with the deformation localization. The anti-slide pile with anchored bolt homogenizes slope deformation and resists the displacement of soil, therefore delaying the failure of side slopes.
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Keywords:
- side slope /
- anti-slide pile /
- anchored bolt /
- centrifugal model test /
- soil-structure interaction
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图 5 y=120 mm最大剪应变水平分布
Figure 5. Horizontal distribution of maximum shear strain at y= 120 mm
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图 6 x = -210 mm水平位移竖向分布，
Figure 6. Vertical distribution of horizontal displacement at x = -210 mm
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