桩截面尺寸对岩堆三排桩力学特性的影响研究

以某铁路工程采用三排抗滑桩治理大型岩堆为例，基于有限元软件，以抗滑桩截面尺寸为变量，研究了多排抗滑桩的受力特性。发现了三排抗滑桩的弯矩分配规律和滑坡推力分配比值，并对抗滑桩顶水平位移进行了研究。结果表明:采用三排抗滑桩治理大型岩坡，其桩截面尺寸1.50 m×2.50 m与2.00 m×2.75 m为最优；在优化设计中，应适当增加第二排抗滑桩的锚固长度。

Study on Influence of Pile Section Size on Mechanical Properties of Three-row Piles of Rock Piles

Taking a three-row anti-slide pile to treat large rock piles in a railway project as an example, based on the finite element software, the stress characteristics of multi-row anti-slide piles are studied and analyzed with the anti-slide pile cross-section dimensions as variables. The bending moment distribution law of three-row anti-slide piles and the ratio of landslide thrust distribution were found, and the horizontal displacement of the pile top was studied and analyzed. The results show that if three-row anti-slide piles are used to treat large rock slopes, the optimum section sizes of the piles are 1.50 m×2.50 m and 2.00 m×2.75 m. In the optimization design, the anchorage length of the second row of anti-slide pile should be appropriately increased.