本文根据弹性理论推导并给出了压力管道及其混凝土包封的环向应力计算公式,认为小管径的压力管道包封可以取消隔离层,这样可以简化施工、节省造价。本文通过对DN630以下钢管、球墨铸铁管、PE管、PVC-U管等压力管及其包封设计算例进行分析、讨论,给出了一些建议,可供科研或设计人员参考。 Based on the elastic theory, this paper derives and gives the formula for calculating the hoop stress of the pressure pipe and its concrete encapsulation. It is concluded that the pressure pipe encapsulation with small pipe diameter can eliminate the isolation layer, which can simplify the construction and save the cost. In this paper, DN630 following steel pipe, ductile iron pipe, PE pipe, PVC-U pipe pressure pipe and its envelope design example analysis, discussion, and gives some suggestions for scientific research or designers reference.