电缆排管过路包封层弹性地基梁属性及优化设计

Analysis of Optimization Design of Beam on Elastic Foundation Method for Reinforced Utility Pipe Underneath the Active Roadway

高压电机电缆在穿越道路等上覆荷载较大或者荷载分布不均的地段时,高压电力电缆用的排管多需要采用钢筋混凝土进行包封。现有的做法为采用标准化的包封结构层,因其无法反映不同地基土和排管包封结构层的几何尺寸对结构内力的影响,故在重车通行区段若采用素混凝土包封或者按构造配筋的包封混凝土排管,存在一定的安全隐患。在分析典型排管结构的基础上,针对不同的基床系数,分析排管包封混凝土的弹性地基梁属性,提出基于长梁、半长梁内力解,并结合常见的工程实际条件,提出过路段排管包封混凝土结构层的优化设计建议,为相关工程的建设提供参考。

In the section where the overlying load is large or the load distribution is uneven,such as crossing active highways and streets,the utility pipes used for high-voltage power cables often need to be encapsulated with reinforced concrete.The existing engineering practice is to use a standardized envelope structure layer,which cannot reflect the influence of different foundation soils and the geometric dimensions of these utility pipe envelope structure layer on the internal force of the structure.Encapsulated concrete projects that are sealed or reinforced according to the structure have great potential safety hazards.Based on analyzing the typical pipe structure,according to different soil bed coefficients,the properties of the beam over elastic foundation of the tube-encapsulated concrete are analyzed.The internal force solution based on the long beam and semi-long beam is proposed,and combined with common engineering actual conditions,the proposed suggestions on the optimal design of the encapsulated structural layer of the pipes in the crossing section provide a reference for the construction of related projects.