过街通道矩形顶管施工土体变形分析

Analysis of Soil Deformation During Rectangular Pipe Jacking Construction of Channel Across the Street

针对佛山某地铁站出口市政过街通道矩形顶管施工对土体的影响,采用FLAC3D进行数值模拟,分析探讨了地表纵横向变形规律及其影响范围,并对深层土体位移分布特征进行了总结。通过对比分析表明,地表横向沉降数值模拟结果与实测值基本吻合,其分布曲线类似于正态分布,且随着深度的增加影响范围呈略减小趋势,而深层土体侧向水平位移随深度呈弓形分布。

Base on influence of the rectangular pipe jacking construction of a subway station export municipal channel across the street on soil in Foshan construction procedures were simulated by software FLAC3D, vertical and horizontal surface deformation regularity and its affected area were analyzed ,the distribution character- istics of deep soil displacement are summarized. Contrast analysis showed that the numerical results was consistent with the measured value of the surface vertical settlement, the distribution curve was similar to a normal distribution, and the scope of influence was slightly decreasing trend with the increase of depth, but the deep soil lateral horizon- tal displacement of soil arched distribution along the depth.