Synergism Analysis of Bedding Slope with Piles and Anchor Cable Support under Sine Wave Vehicle Load
Synergism Analysis of Bedding Slope with Piles and Anchor Cable Support under Sine Wave Vehicle Load
复制标题
DOI：
10.1155/2016/5753970
复制
发表时间：
2016-10
影响因子：
--
通讯作者：
Li Dan-feng;Wang Lian-jun
中科院分区：
文献类型：
--
作者：
Li Dan-feng;Wang Lian-jun
边坡在动荷载作用下的失稳是工程中的技术难点，对动荷载作用下边坡稳定性的评价和动荷载的控制显得尤为重要。以重庆市涪陵至丰都至石柱高速公路K27+140 m~380 m典型路段右侧边坡（简称K27边坡）为例进行计算分析。K27边坡在正弦车辆荷载作用下，采用锚和抗滑桩联合支护，研究了锚索和抗滑桩的联合作用。采用三维有限元法对桩-锚索支护顺层边坡进行了数值模拟，得到了边坡的特征值。为了减小波长反射效应对弹性边界条件的影响，将Lysmer面粘性边界与传统的地面支撑边界相结合，对顺层边坡在动荷载作用下的时程进行了分析计算。得到了抗滑桩锚支护的动力响应。提出了桩锚支护协调间距的概念。进一步验证了桩锚支护坐标间距可用于评价动荷载作用下边坡的稳定性，为动荷载的控制提供了一种新的方法。
Slope instability under dynamic load is the technical difficulty in the engineering; the evaluation of slope stability under dynamic load and the control of dynamic load is particularly important. In this paper, taking the right side slope of K27+140 m~380 m typical section (K27 slope for short) in Chongqing Fuling-Fengdu-Shizhu expresses highway as an example to calculate and analyze. The K27 slope is under sinusoidal vehicle load and supported by anchor cable and antislide pile to resist downslide strength; at the same time, the combined effect of them is studied. Three-dimensional finite element methodology (FEM) is used to simulate the bedding slope with piles and anchor cable support; furthermore, the eigenvalue can be obtained. In order to reduce error of the elastic boundary conditions caused by the reflection effect of wavelengths, the combination of Lysmer surface viscous boundary and traditional ground support boundaries is utilized to analyze and calculate the time-histories during bedding slope under dynamic load. The dynamic response of pile anchor support to resist sliding force is obtained. The concept of the pile anchor supporting coordinate interval is put forward. Furthermore, it is verified that the pile anchor supporting coordinate interval can be used to evaluate the stability of the slope under dynamic load and provide a new method for the control of the dynamic load.