抗滑桩与滑坡作用机理及加固效果研究

摘要

The numerical calculation models of the slope without the support of the pile and under the support of the pile based on a field loess test in this paper was established with the FLAC software.Ultimate load,horizontal displacement of one point in the landside,internal forces and deformation of piles were studied through the calculation under vertical loads on top of landslide.Research showed that the anti-sliding ability of the landslide was significantly enhanced while the dis-placement of the sliding body significantly reduced under the supporting of piles.Bending moment located below the slip-ping surface and born by anti-sliding piles to slightly turn piles in a clockwise direction under the thrust action of landslide.%本文基于某现场黄土试验，运用 FLAC 软件建立无桩支护和有桩支护下滑坡的数值计算模型，通过模拟在滑坡顶部逐级施加竖向荷载时此两种工况下滑坡的极限荷载、坡体某点的水平位移、桩体的内力及变形，分析某铁路路基边坡抗滑桩与土体相互作用和对滑坡的加固效果。研究表明，有桩支护时滑坡抗滑能力显著提高的同时滑体滑动位移也明显减小，并且抗滑桩是桩后承受弯矩，弯矩主要位于滑裂面以下，使桩体在滑坡推力作用下发生小幅度顺时针转动。