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隧道开挖引起的地面沉降会引起邻近区域地埋管线的附加受力和变形,甚至会引起管线的开裂破坏。将隧道开挖引起的地面沉降效应作为外界条件施加于地埋管线上,基于改进的Winkler地基模型,并采用虚拟节点以考虑管线接口处的力学特性,提出了刚度非连续接口管线在隧道开挖条件下响应的简化理论分析方法。通过与弹性理论法、离心机试验和实际工程对比,验证了该方法的合理性。并通过与层状弹性理论解的对比,得到了该方法在非均质地基中的适用性。参数分析认为忽略管线接口存在的连续管线假设在分析接口地埋管线有不合理处。
Ground subsidence caused by tunnel excavation may cause additional stress and deformation of the buried pipeline in the adjacent area and may even cause cracking of the pipeline. Based on the improved Winkler foundation model and using virtual nodes to consider the mechanical properties at the pipeline interface, the paper presents a new method that the rigid discontinuous interface pipeline is used in tunnel excavation Simplified theoretical analysis of response conditions. Compared with the elastic theory method, centrifuge test and practical engineering, the rationality of this method is verified. The applicability of this method in heterogeneous soil is obtained by comparison with layered elastic theory solution. The parametric analysis assumes that there is no reason to ignore the existence of a continuous pipeline in the pipeline.