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竖向预应力锚索抗滑桩是一种锚索从桩顶竖向穿过抗滑桩,直接嵌入基岩以下的新型抗滑桩。本文以某滑坡治理工程为例,采用数值模拟方法,研究竖向预应力锚索抗滑桩的内力,从桩长、锚固力、偏心距几个方面对竖向预应力锚索抗滑桩的桩身结构进行优化研究。模拟研究结果表明,其他条件不变时,竖向预应力锚索抗滑桩随着桩长的减小,桩身弯矩最大值变化不大,剪力最大值呈增大趋势;随锚固力增加,桩身内力最大值均呈先减小后增大的趋势,表明选取合适的锚固力对桩身内力影响很大;随着锚索偏心距的增大,桩身内力最大值均逐渐减小。优化结果表明,竖向预应力锚索抗滑桩锚固段比悬臂桩减少16.7%,桩身剪力最大值减少31.7%,桩身弯矩最大值减少41.1%。竖向预应力锚索抗滑桩是一种有应用前景的抗滑桩。
Vertical prestressed anchor cable anti-slide pile is a kind of new-type anti-slide pile that the anchor cable passes vertically through the anti-slide pile from the pile top and is directly embedded in the bedrock. In this paper, taking a landslide control project as an example, the numerical simulation method is used to study the internal forces of vertical prestressed anchorage anti-slide piles. From the aspect of pile length, anchorage force and eccentricity, Pile body structure optimization research. The simulation results show that the maximum value of the bending moment of pile increases with the decrease of the pile length when other conditions remain unchanged. With the increase of the anchorage force Increase, the maximum value of the internal force of the pile first showed a trend of decreasing firstly and then increasing, which indicated that the proper anchoring force had a great influence on the internal force of the pile. With the increase of the eccentricity of the anchor, the maximum value of the internal force of the pile gradually decreased small. The results of optimization show that the anchorage length of anti-slide pile with vertical prestressed anchor cable is reduced by 16.7%, the maximum value of pile shear force is reduced by 31.7% and the maximum bending moment of pile body is reduced by 41.1%. Vertical prestressed anchor cable anti-slide pile is a promising anti-slide pile.