摘要：研究目的：微型桩是一种柔性支挡结构，在地震中其发生弯曲变形，可以有效避免脆性破坏的发生，因而在抗震 加固中常被优先采用。目前，对微型桩的研究多集中于其静力学特性，通过大型振动台试验进行其动 力学特性的研究很少。为研究微型桩及其加固边坡的动力学特性，本文就平行体系和“人”字形体系 两类微型桩支护边坡的大型振动台试验及数值计算展开分析，并比较两类微型桩的抗变形能力和承载 能力。研究结论：（1）边坡在地震作用下变形最先开始于坡体后缘的张拉裂缝，坡体中竖向裂缝较多，水平地震作用对 坡体的变形影响更大；（2）地震作用下，微型桩变形表现为以滑面为界的“S”形弯曲变形和桩顶绕 桩底的旋转变形；（3）微型桩弯矩呈现“S”形分布，剪力呈现“〖JX*3〗〖HT4,5〗|〖HT〗〖JX-*3 〗〖KG-1*5〗〖HT5,2"〗>〖HT5"SS〗”形分布；（4）“人”字形体系微型桩的抗变形能力和承载能 力较平行体系微型桩更强；（5）本研究成果主要应用于边坡工程的抢险与加固。

Abstract：Research purposes： Micropile is a flexible support structure, the bending deformation occurred in the earthquake can effectively avoid the brittle failure and thus the micropile is often preferred in seismic reinforcement. At present, the research of micropiles is mainly focused on the study of static characteristics and little research is carried out on the dynamic characteristics by large-scale shaking table. In order to study the dynamic characteristics of micropiles and their reinforcing slope which is supported by micropiles, this paper carries out the calculation analysis and large-scale shaking table test of slope which is supported by herringbone micropiles and parallel micropiles, and compares the anti-deformation ability and bearing capacity of two types of micropiles.  Research conclusions： (1) The deformation of the slope begins from tensile cracks at the trailing edge of the slope after the earthquake, and the vertical cracks are more in the slope. The horizontal earthquake has a greater effect on the deformation of the slope. (2) Under the earthquake, the deformation of micropiles is shown as the "S"-shaped bending deformation bounded by slipping surface and the rotation deformation of pile from the top to the bottom. (3) The bending moment of the micropiles is shown as “S” shaped distribution and the shear force is showed as "〖JX*3〗〖HT4,5〗|〖HT〗〖JX-*3〗〖KG-1*5 〗〖HT5,2"〗>〖HT5SS〗" shaped distribution. (4)The anti-deformation ability and bearing capacity of the herringbone micropiles are stronger than those of parallel micropiles. (5) The research results are mainly used in reinforcing and rescuing slope engineering. 