考虑分级开挖的深基坑支护计算

 提出了考虑深基坑变形的一种新的支护结构计算方法——弯杆计算法，在弯杆法的有限元计算中， 通过变换座标的方式考虑上一级开挖的变形，从而达到考虑分级开挖的工况。实例验算表明，该程序能够计算出支护结构变形的变化趋势，并给出了简要的自编计算程序框图。

Calculation on Protective Structures of Deep Foundation Ditch Considering Step Braced Excavation

In this paper, a new method called bending bar calculation is presented. It could be used in the calculation of protective structures of deep foundation ditch in consideration of step braced excavation. By means of transforming the coordinates in the calculation of FEM, considering the deformation of former step excavation, the behavior of expected step excavation may be obtained. the result from an illustration calculation show that it could give the trend of the protcetive structures deformation. The schematic outline of the program is also given in the paper.