山地建筑场地整体稳定性分析研究

Analysis on the Stability of Hillside Building Construction Site

随着建筑场地日益紧张,越来越多的建筑物修建于山区场地之上,而原本稳定的山地边坡在修筑建筑物之后其边坡稳定性是否仍满足建筑场地安全储备的要求,成为了山地建筑需首要考虑的问题。故以某山地高层建筑工程典型剖面为例,从边坡安全系数、塑性区、支护结构稳定性以及边坡变形对建筑基础影响等方面对建筑场地稳定性进行分析。通过折线滑动法、拟静力法和时程分析法对建筑物附加竖向、水平荷载下的边坡稳定性进行了分析。分别考虑了一般、小震和大震情况下的工况,并提出了不同工况下场地稳定性的判据。通过对场地分析方法、荷载工况选择、基础类型和支护措施等方面的论述,以为山地建筑场地整体稳定性分析提供参考。

With the growing reduction of construction sites,more and more buildings are built on side slopes.Whether the stability of the originally stable mountainous slope still meets the requirements of the safety reserve of the construction site after the construction of buildings has become the primary consideration of mountainous buildings.Taking the typical section of a mountainous high-rise building project as a case,the stability of the construction site was analyzed from the aspects of the slope safety factor,the plastic zone,the stability of the support structure and the influence of slope deformation on the building foundation.The slope stability under additional vertical and horizontal loads was analyzed by the brokenline sliding method,the quasi-static method and the time history analysis.With the general,small and large earthquakes considered respectively,and the criteria of site stability under these different working conditions were put forward.Through the elaboration of the site analysis method,the load condition selection,the foundation type and support measures,this paper provides reference for the overall stability analysis of a mountainous building site.