深基坑开挖对邻近框架建筑物的影响分析

以珠江新城深基坑工程为依托，根据基坑支护形式拟合出变形预测公式，将框架建筑进行合理简化，运用DCFEM法对有内撑式支护条件下的基坑不同开挖深度对邻近框架建筑物内力的影响进行分析。结果表明:内撑式支护条件下，柱的应力集中主要表现在角柱和离基坑开挖面较近的内侧柱；梁的应力集中最大值出现在首层的主梁上，且沿着楼层升高应力集中的幅度逐渐减小。

Analysis on Effect of Deep Foundation Pit Excavation on Adjacent Frame Building

Taking the deep excavation in Zhujiang New Town as the background, the paper, on the basis of the deformation prediction formula fitted out according to the foundation pit supporting mode, made reasonable simplification on frame building, and then analyzed how the deep excavation in different depth, on the condition of interior bracing support, affects the internal force of adjacent frame building. The result shows that, with interior bracing, stress concentration in respect of column is presented mainly at corner columns and medial columns close to the excavation face; and stress concentration in respect of beam arises with maximum stress value at the main beam of first floor, and with the extent gradually reduced when ascending the flights.