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高填方地区地基的差异沉降是引起直埋地下管线发生破坏的主要因素之一。大部分高填方地区的差异沉降可以描述成抛物线形式。本文利用分布角法,在抛物面形地表位移荷载下,求得作用在管线上的荷载,然后利用winkler地基梁理论推导出抛物线形不均匀沉降作用下管线响应公式,最后用有限元软件ABAQUS对比验证结果的正确性。本文的结果可以用于隧道开挖、降水等引起的可以用抛物线形式描述的地基不均匀沉降以及高填方地表自主不均匀沉降对管道影响的情况中,对管道安全性控制提供一定的理论依据。
The differential settlement of foundations in high-fill areas is one of the main factors causing the destruction of buried underground pipelines. The differential settlement in most high-fill areas can be described as a parabola. In this paper, the distribution angle method is used to obtain the load acting on the pipeline under paraboloid displacement. Then, the pipeline response formula is deduced by the winkler foundation beam theory. Finally, the finite element software ABAQUS is used to verify The correctness of the result. The results of this paper can be used in the case of tunnel excavation, precipitation and other effects caused by the parabola can not describe the uneven settlement of the foundation and the uneven high-fill surface subsidence caused by the impact on the pipeline, the pipeline safety control to provide a theoretical basis .