Abstract: By fusing advantages between cantilevered anti-slide piles and pre-stressed anchor anti-slide piles, a new method for landslide control, the vertical pre-stressed anchor anti-slide piles with trapezoid section, was proposed. By analyzing loaded performance of the vertical pre-stressed anchor anti-slide piles with trapezoid section, the calculation method for its internal force was established, and the optimum formula for the design value of pre-stressed anchor tension, which was related to design parameters, such as, landslide thrust and pile distance, was gained. Engineering examples indicated that, within same cross-sectional area, by comparing with cantilevered anti-slide piles with rectangle section, the vertical pre-stressed anchor anti-slide piles with trapezoid section could increase the compression zone of anti-slide piles by 25.8 percent and decrease the reinforcement amount in tensile area by 20.4 percent. It has a good economic performance. The method provides a new technological selection for the management of large and oversize scale landslide in the river and reservoir slope and/or landslides with thick colluvium and slope sediments along highway.

Key words: road engineering, slope treatment, anti-slide piles, structure type, optimum design method

摘要： 融合悬臂抗滑桩和预应力锚索抗滑桩的优点，提出了一种滑坡治理新方法——梯形断面竖向预应力锚索抗滑桩；通过分析梯形断面竖向预应力锚索抗滑桩的受荷性能，建立了梯形断面竖向预应力锚索抗滑桩内力计算方法，得到了与滑坡推力和桩间距等设计参数相关的预应力锚索拉力设计值计算公式。实例分析表明：与横截面积相同的矩形断面悬臂抗滑桩相比，梯形断面竖向预应力锚索抗滑桩可使抗滑桩受压区面积增大25.8%，受拉区钢筋用量减少20.4%，经济性能良好，可为治理江河水库岸坡大型特大型滑坡及山区公路巨厚层崩坡积滑坡提供一种新的技术选择。

关键词: 道路工程, 岸坡治理, 抗滑桩, 结构型式, 优化设计方法