预应力锚索抗滑桩支挡结构体系数值模拟研究

为克服现行预应力锚索抗滑桩设计计算方法存在诸多问题,探讨了快速拉格朗日有限差分程序（FLAC）,对预应力锚索抗滑桩支挡结构体系进行整体数值模拟方法。以较好的考虑抗滑桩、预应力锚索、滑坡体及锚固地层之间的相互作用、共同工作特性,提高设计计算效率。工程实例数值模拟计算结果比较表明,该方法是可行的。不失为一种有效的新途径。可供有关设计部门参考。同时,数值模拟也揭示,与普通抗滑桩相比,预应力锚索抗滑桩受力更合理,可使桩的截面尺寸、桩的锚固深度及桩间距等的设计更加经济。

Numerical simulations for retaining structural system of anti-slide pile with prestressed anchor cable

To overcome the problems the finite difference method of Fast of the calculation of anti-slide piles with prestressed anchor cables, the method of using Lagrangian Analysis of Continuum（FLAC） to simulate the retaining structural system of anti-slide piles with prestressed anchor cables is studied. In this method, the interactions among anti-slide piles, prestressed anchor cables, landslide bodies and anchor stratum may be better considered and the efficiency of design calculation can be improved. The comparison of numerical simulation results of a project example indicates that this method is viable and it is a new effective method. So it can provide references to design departments. At the same time, the results of numerical simulation also show that compared with common anti-sliding piles, the way of load bearing of anti-slide piles with prestressed anchor cables is more reasonable so that the dimensions of the pile sections, the anchor depths and the spaces of piles can be designed more economically.