建筑物超载对深基坑周边地表沉降影响分析

Analysis on the Influence of Building Overload to Ground Settlement Adjacent to Deep Foundation Pit

摘要:

结合理论推导和对工程实测数据的整理分析，对天然场地和存在邻近建筑物时2种情况下的墙后地表沉降形态进行了对比分析，采用上海软土地区墙后地表沉降经验公式，对存在建筑物超载情况下的地表沉降曲线进行了良好的拟合，直观地表示出地表沉降槽的大小及形状、墙后最大沉降点的位置等。结果表明，邻近建筑物的存在能显著改变天然场地的地表沉降曲线形态，是否考虑建筑物存在的影响，将影响到对基坑及周边环境安全状态进行正确的评价和预测。

Abstract:

According to the theoretical derivation and reorganizing analysis on the engineering test data, comparative analysis was made on the ground settlement under different conditions of natural ground and the site with existing buildings. With the empirical formula of ground settlement in soft soil of Shanghai, the ground settlement curve of existing buildings overload were fitted with visual representation of the size and shape of ground settlement tank as well as the position of the largest settlement. It is showed that the existence of adjacent buildings obviously change the ground settlement curve shape in natural ground, the consideration of the influence by existence of adjacent buildings is related to the correct evaluation and prediction on the safe state of foundation pit and surrounding environment.