山区风电临坡圆形基础倾覆失稳对坡体变形的影响

山区风电塔架均修建于山区丘陵坡顶。若风电基础倾覆失稳，将对边坡稳定性造成影响。通过数值模拟方法，研究了临坡圆形基础倾覆失稳引起的边坡土体变形，讨论了基础直径、边坡角对坡体变形的影响。结果表明：坡面隆起随基础直径增大使坡面隆起量增大，随临坡距增大而减小，临坡距e/D=3（e为基础边缘距离边坡距离，D为基础直径）较e/D=5时最大隆起值增大了143%。此外，边坡角增大不仅使坡面隆起增加，而且边坡土体变形范围增大。讨论了基础转动点与基础临坡距离之间的关系，发现圆形基础的转动点位置随临坡距增加呈先上升后下降的趋势。

Influence of the overturning failure of the circular foundation for mountain wind turbine on the slope deformation

The mountain wind turbines are all built near the mountain slope. The failure of the wind turbine foundation will influence the stability of the nearby slope. Numerical simulations were conducted to investigate the influences of the overturning failure of the wind turbine foundation on the stability of mountain slope. The effects of the foundation diameter and the slope angle on the slope deformation were discussed. Results show the magnitude of the upheaval of the slope increases with increasing the foundation diameter and the slope angle; however, decreases with increasing the distance between the foundation edge and the slope. When the normalized distance between the foundation edge and the slope equals e/D=3 (e and D are the distance between the foundation edge and the slope and the foundation diameter, respectively), the maximum value of the upheaval of the slope is 1.43 times of that for e/D=5. In addition, it was also found that the rotation center position of the foundation first moves upward with increasing the diameter of the foundation, then moves downward with further increasing the foundation diameter.