深基坑工程临近管道力学性状的计算

Calculation on Mechanical Behaviors of Buried Pipelines Adjacent to Deep Excavation

计算了深基坑开挖引起的临近管道的竖向位移、应力和转角。基于Rajani和Tesfamariam发展的WPSI模型,考虑了管道和土的竖向相对位移,得到改进后的管土接触数学模型,并利用ABAQUS软件的PSI单元,求解了该模型的数值解。以文献中实测的地表沉降为输入条件,计算了不同直径管道的竖向位移、应力和转角,并通过归纳对比,得出了管径大小对这些物理量的影响。

The vertical displacement, stress and rotation of pipeline affected by deep excavation were calculated. Basing on WPSI model developed by Rajani and Tesfamariam and taking vertical relative displacement between pipeline and soil into account, an improved pipe-soil interaction mathematical model was developed. An FEM model based on pipe-soil interaction （PSI） element was used to get the numerical solution of the mathematical model. Us pipeline were calculated. By comparison, effect of di- ameter on those physical quantities was evaluated, ing the soil settlements listed on literature as input condition, the vertical displacement, stress and rotation of different diameter.