以南京某工程为例浅谈基坑设计中存在的若干问题

Discussing on Some Prolems in Foundation Pit Design Taking an Engineering in Nangjing for Example

从南京某基坑位移超限出发,探讨了规范中桩身弯矩取值偏低,及坑上局部和锚固段抗弯刚度取值偏高两个问题,这是影响基坑安全和桩顶位移超限的两个重要原因。该文提出了圆截面钢筋混凝土桩抗弯刚度取值的一个方法,与工程实测位移吻合较好。

This paper starts from the foundation pit displacement overrun . The two problems are discussed such as the low value of pile bending moment and the high value of bending rigidity in part of upper the foundation pit and section of anchoring area. These are two important elements which effect the foundation pit safety and the displacement overrun of pile tip. This paper puts out a calculating method of bending rigidity of circular cross-section steel concrete pile, and it meets with the engineering displacement perfectly.