Abstract: 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.

Key words: Utility Pipe, Encapsulate, Beam om Elastic Foundation, Longitudinal Internal Force, Optimized Design