The ground deformation caused by earthquake, soil differential settlement often induces damage of the buried pipe due to pipe-soil interaction.
由于埋地管道与土体之间存在管、土相互作用，地震、地面不均匀沉降等地层变形均会导致管道受力、变形而被破坏。
The settlement of a soft soil ground often manifests as a complicated nonlinear feature at time sequence due to the influence of many factors.
软土地基的沉降受众多因素的影响，在时序上常表现出复杂的非线性和不确定性。
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