Calculation methods of vertical load for directly buried heating pipelines

Presents four conventional calculation methods i.e. the Technical specification for directly buried heating pipeline engineering in city method, Marston load method, Г·К·Клейн method and prism load method. Provides the curves of soil vertical pressure coefficient to calculate vertical load and discusses the calculation method and its application conditions for vertical or lean walls in pipe channels and for rigid or flexible pipes. The calculation results show that the result by Г·К·Клейн method for lean wall in the pipe channel is the least and that by the  first method is the largest and the vertical load in actual engineering is close to that by the prism load.