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将滑坡体中的管道简化成大挠度的梁,将滑坡体外管道看作半无限长的梁或杆,考虑管梁的几何非线性、滑坡体外土壤的纵向抗力的物理非线性以及管道的内压和温差作用,基于滑坡体内外管道内力和变形的连续性,推导得出了在当量轴向力为拉力或压力两种情况下管道的内力和位移的有关计算式,提出了当量轴力为拉力或压力的判别式。横向滑坡中埋地管道的位移和内力计算最终归结于两个非线性方程的求解,可用牛顿迭代法或作图法解之。提供了算例及其结果分析,讨论了以前有关理论的不足之处。
Considering the geometrical nonlinearity of the pipe girder, the physical nonlinearity of the longitudinal resistance of the soil outside the landslide and the internal pressure of the pipe, the pipe in the landslide body is simplified as a large-deflection beam. Based on the continuity of internal and external pipe internal forces and deformation in landslide, the calculation formulas of internal forces and displacements of pipe under equivalent axial force as tension or pressure are deduced. The equivalent axial force is proposed as the tensile force Or pressure discriminant. The displacement and internal force calculation of the buried pipeline in the horizontal landslide is ultimately due to the solution of two nonlinear equations, which can be solved by the Newton iterative method or the mapping method. Provided an example and its result analysis, and discussed the shortcomings of previous theories.