黄土高填方坡体加载过程变形-力学响应特征研究

摘要

An increasing number of large engineering projects is being carried out in the hilly loess areas in China.In order to obtain sufficient usable area in limited space,it is usually necessary to dig a mountain to fill the ditch and to form a large number of high fill slopes of more than 40m in height.Their geological conditions are complex.Their mechanical properties are very different.Their construction is difficult.The deformation and stability problems of high fill slopes is prominent.High fill slope engineering has become one of the most dangerous human engineering activities in the loess area,which seriously affect the economic construction and urbanization process in the loess area.This paper takes a high fill slope as the research object,combines the field investigation and investigation data,understands the geological profile of the study area and establishes the generalized model of the loading process of the high fill slope.It studies deformation and monitoring analysis of the backfill structure of the high fill slope.It analyzes the mechanical-deformation response characteristics of high fill slope during loading process by numerical simulation.It is of great theoretical and engineering significance to study the deformation of the anti-slide pile and the inter-pile retaining structure and the stress analysis of the anchor cable on the high embankment slope of loess.The study of deformation and monitoring analysis of the backfill structure of the high fill slope is of great theoretical and engineering significance to study the mechanics and deformation response characteristics of the loading process and to study the deformation of the anti-slide pile,the inter-pile retaining structure and the force of the anchor cable.%大型工程项目在我国黄土丘陵地区的开展日益增多,为了在有限的空问得到足够的可利用面积,通常需要挖山填沟造地形成了大量高度超过40m的高填方边坡.高填方边坡地质条件复杂,填料物理力学性质差异大,施工困难.高填方边坡的变形与稳定问题突出.高填方边坡工程已成为黄土地区最具危险性的人类工程活动之一,其严重影响黄土地区的经济建设和城市化进程.本文以国内某高填方边坡为研究对象,结合野外调查和勘察资料,结合研究区的地质概况建立高填方边坡加载过程的概化模型;通过研究区高填方边坡回填加载支挡结构变形与监测分析;借助数值分析高填方坡体加载过程力学-变形响应特征,对研究黄土高填方边坡抗滑桩、桩间板支挡结构变形和锚索的受力分析具有重要的理论和工程实践意义.