室外的管道敷设,常常会遇到各种各样的地理环境。在泥泞的沼泽地带,会有很多不便。因为在这样的地理环境中进行管道敷设,一方面要考虑干旱季节水的枯竭管道下沉;另一方面还要注意连绵大雨时水涨水落管道的浮沉;同时还应该校核支墩在这种环境的额外赘余力作用下的稳定性。一、工 Outdoor pipe laying, often encounter a wide range of geographical environment. In the muddy swamp, there will be a lot of inconvenience. Because in such a geographical environment for pipeline laying, on the one hand to consider the dry season, the depletion of water pipe sinking; the other hand, but also pay attention to the ups and downs of plumbing ups and downs when the rain; also should check the pier in this Environment under the extra margin of stability under the force. First, workers