川藏公路某滑坡抗滑桩工程效果的有限元后评价

Finite element post evaluation of landslide control using anti-slide pile along Sichuan-Tibet Highway

在对川藏公路二郎山k2730段Ⅰ#滑坡及其抗滑结构现场调研的基础上,依据预应力锚索抗滑桩中桩土相互作用特征引入接触单元,并改进了PCEP2D有限元软件,将滑坡和抗滑桩结构相互作用作为整体,对桩体位移、桩身弯矩、锚固段桩体接触单元应力分布做了分析。与传统计算方法、实际监测资料进行对比,结果表明,该滑坡治理工程效果较好。

Based on the in-situ survey of Erlangshan landslide and its controlling design data, a finite element program PCEP2D using contact elements, considering the interaction characteristics of anti-slide pile with prestress cable, is improved. Then, displacement, bending moment, stress distribution of contact elements along the pile are calculated. Moreover, comparing with traditional ＂m＂ method and monitoring data, it is shown that the engineering control effect of anti-slide piles is better.