【摘要】 降雨诱发的滑坡灾害在我国频繁发生，传统的抗滑桩演变为抗滑短桩加固边坡，却又易产生“越顶破坏”现象。因此，提出了抗滑短桩通过竖向植筋带锚拉坡面网格梁兼顾浅层和深层防护的边坡加固技术，并采用数值计算的方法对其进行研究。首先，采用MIDAS有限元软件对某一工程边坡进行降雨入渗分析;然后，对该边坡在抗滑短桩锚拉竖向植筋带加固前后的稳定安全系数、坡土变形和最大剪应力进行分析，探讨抗滑短桩锚拉竖向植筋带加固边坡的可行性。研究结果表明:随着降雨入渗，坡肩和坡脚处坡土孔隙水压力逐渐增加。坡脚处暂态饱和区范围由初始时刻的0 m扩展延伸至降雨结束时刻的1 m，边坡稳定性逐渐降低。抗滑短桩锚拉竖向植筋带能够承担部分下滑推力，使降雨结束后边坡从无加固时的失稳状态转变为相对稳定状态，有效避免了边坡浅层土体“越顶破坏”现象的发生。更多还原

【Abstract】 Rainfall-induced landslides occur frequently in China,and the traditional anti-slide piles evolve into antislide short piles to strengthen the slope,but it is easy to induce the phenomenon of overtopping failure. Therefore,we propose a slope reinforcement method of slope grid beam anchored by short anti-slide pile through vertical geotextile belts which takes into account both shallow and deep protection. The MIDAS finite element software is used to simulate the soil slope during the rainfall infiltration. By analyzing the stability safety factor,deformation and maximum shear stress of the slope before and after reinforced,the proposed slope reinforcement technology is studied. Numerical simulation results show that under rainfall infiltration,at the shoulder and toe of slope the pore water pressure increases.The transient saturated zone at the toe of the slope expands from 0 m at the initial time to 1 m at the end of rainfall.During the rainfall process,the slope stability reduces gradually. The vertical geotextile belts anchored by short antislide piles can bear part of the sliding thrust force. After rainfall,the slope changes from an unstable state without reinforcement to a relatively stable state by vertical geotextile belts anchored by short anti-slide piles. The phenomenon of overtopping failure of the shallow slope soil was effectively avoided.更多还原