上埋式管道上竖向土压力计算的探讨

Study of vertical soil pressure on positive buried pipeline

作用于上埋式管道的竖向土压力受管土相对刚度及基床形式的影响，而目前的一些计算方法均未考虑这两大因素，如对钢管和钢筋混凝土管道采用完全相同的计算公式，使计算结果与实测结果有一定的差距。为此，利用实测数据分析这两大因素的影响程度，最后根据实测结果，假定管道变形所引起土滑动破坏的形状，提出了土压力的计算模型，推导出了计算公式，公式被实测结果所验证，可供管道工程设计参考。

The soil pressure on positive buried pipeline is affected by relative stiffness of soil and types of foundational beds, but these factors have not been considered in some calculative methods currently. For example, in the calculation of soil pressure on steel pipe and on concrete reinforced pipe the same formulae are used, which causes significant difference between evaluated values by current methods and measured result in the field. So a new calculative model was put forward by considering real slipping plane of soil resulted from deformation of pipe and foundation. And the reliability of the formula newly created was testified by measured value in the field.