考虑降雨入渗的填方高边坡稳定性分析

发布时间：2018-06-05 22:14

本文选题：填方边坡 + 降雨入渗　；参考：《重庆交通大学》2015年硕士论文

【摘要】：对西南山区城市,城市化进程的不断推进与工程用地的矛盾日益突出,而高填方工程成为解决建设用地的有效途径之一。在填方工程的稳定性影响因素中,降雨入渗对坡体渗流场分布有着重大影响,无疑是高填方工程失稳的主要诱发因素。本文基于饱和-非饱和渗流理论和边坡稳定性分析方法,结合重庆鱼洞某填方边坡,通过对研究区域(对称)进行二维简化,利用有限元软件分析降雨条件下边坡的渗流特性、变形情况及其稳定性。并结合实测数据对沉降作了预测评估,结合雨水入渗深度及坡底饱和区面积对雨后坡体安全系数进行回归分析。其内容主要包括:①运用SEEP/W有限元软件对降雨作用下的高填方边坡的降雨入渗过程及渗流场变化进行分析,包括暂态饱和区的发展过程、孔隙水压力及体积含水率的变化规律、不同降雨类型的渗流场分布讨论。②运用非饱和土边坡稳定性分析理论,结合降雨过程的孔隙水压力分布情况对该填方边坡的雨后变形及稳定性情况进行讨论;同时结合稳定性影响因子进行敏感性比较,为同类高填方工程设计施工提供参考;③结合对该填方边坡的实测沉降数据建立回归方程预测边坡后期沉降;同时根据降雨入渗深度及坡底饱和区的面积,建立雨后安全系数回归方程。
[Abstract]:For the mountainous cities in southwest China, the contradiction between urbanization and engineering land is becoming more and more serious, and high fill project is one of the effective ways to solve the problem of construction land. Among the factors affecting the stability of fill engineering, rainfall infiltration has a great influence on the distribution of seepage field in slope, which is undoubtedly the main inducing factor of instability in high fill engineering. Based on saturated-unsaturated seepage theory and slope stability analysis method, combined with a filling slope of Chongqing Yudong, the seepage characteristics of slope under rainfall condition are analyzed by using finite element software through two-dimensional simplification of the study area (symmetry). Deformation and its stability. Combined with the measured data, the settlement was forecasted and evaluated. Combined with the depth of Rain Water infiltration and the area of the saturated area at the bottom of the slope, the safety factor of the slope after rain was analyzed by regression analysis. The main contents include the analysis of rainfall infiltration process and seepage field change of high fill slope under rainfall by using SEEPP / W finite element software, including the development process of transient saturated area, the variation law of pore water pressure and volume water content. The distribution of seepage field of different rainfall types is discussed by using the theory of stability analysis of unsaturated soil slope, combining with the distribution of pore water pressure during rainfall, the deformation and stability of the fill slope after rain are discussed. At the same time, the sensitivity is compared with the influence factors of stability, which provides a reference for the design and construction of similar high fill projects. Combined with the measured settlement data of the fill slope, the regression equation is established to predict the late settlement of the slope. At the same time, according to the depth of rainfall infiltration and the area of saturated area of slope bottom, the regression equation of safety factor after rain is established.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU43

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