Buried Pipe Failures Dependent on Soil Stiffness, Too

摘要

Experience has shown that pipe deflections are limited for standard pipeline burial depths; however, under some circumstances, excessive deflections have been measured even at shallow depths, than the backfill material surrounding it, do not present excessive ovalization, and are not influenced by sidefill stiffness. A proper bedding is important since they transmit most of the load through the pipe wall into the bedding. Pipes with D/t I [50; 100] can be normally considered flexible, offering significant structural benefits to the project. That is because if properly installed, they can be buried much deeper than a similarly installed rigid pipe because of the soil-pipe interaction, and will have a maximum deformation similar to the sidefill compression. Therefore, the control of deflection is obtained through the control of soil deformation by verifying backfill compaction level.