强震下抗滑桩加固边坡土体的稳定机制及动力响应探讨

运用ABAQUS有限元软件，建立有桩和无桩2种均质土质边坡模型，采用Newmark-β方法对在强震下的有桩和无桩2种情况的边坡进行时程分析，得到了2种情况下边坡速度、加速度和位移等方面的响应，经过对比分析，得出抗滑桩提高边坡稳定性的机理。结果表明，边坡在某一方向地震波作用下，有无抗滑桩的边坡动力响应有一定差别：速度和加速度方面，2者结果相差不大；位移方面，无抗滑桩的边坡位移明显大于有抗滑桩的边坡位移。由此可见抗滑桩在提高边坡位移稳定性方面起到了很大的作用。本文可为实际工程中边坡的加固设计提供一定的理论依据．

Study on the Stability Mechanism and Dynamic Response of Anti - slide Pile Reinforcing Soil Slope under a Strong Earthquake

Through the finite element software ABAQUS, two kinds of homogeneous soil slope models - with the piles and without those - are established. Based on Newmark - method, the time analysis of the two kinds of slope models under severe earthquake is conducted. The dynamic responses, such as speed, acceleration and displacement, are acquired. Then the results are compared and analyzed. The mechanism of anti - slide pile for improving the stability of the slope is analyzed. The results indicate that the dynmnie responses of the slope with anti - slide piles are a little different from the one without it under the action of seismic wave in a certain di- rection. In the aspects of velocity and acceleration, the results differ little, and the displacement of the slope without anti - slide piles is significantly greater than the one of the slope with them. The result shows that anti - slide pile plays an important role in enhancing the displacement stability of slope. It provides certain theory reference for slope reinforcement design in practical engineering.