身为管道行业工程师,我们看到管道项目大增的结果。幸运的是,绝大多数安装都成功并产生圆管,并得到了环绕回填支持。然而,管道安装偶尔不遵循推荐技术并导致管道变形

Although unusual, one of the most common installation errors is not maintaining a balanced load condition while backfilling the pipe.  Backfill is placed and compacted in lift heights that are generally 6 to 8 inches in depth before compaction.  It is important that the backfilling operation is alternated from one side of the pipe to the other to minimize the unbalanced load condition created when more fill is placed and compacted on one side of the pipe as compared to the other.  It is generally recommended that the differential in backfill height from one side to the other not exceed more than two lift thicknesses.  If this procedure is maintained throughout the backfilling process, the pipe ring stiffness will support the limited differential pressure and maintain its round shape.  However, if the imbalance across the pipe centerline becomes too great, the pipe can become distorted with the top centerline of the pipe moving away from the higher fill pressure, flattening the radius of the side of the pipe and resulting in distorted pipe.  In extreme cases, the pipe geometry can be distorted to the point of wall buckling and even collapse.  Care should be taken to maintain a balanced load condition until the minimum cover depth over the pipe is achieved.  Minimum cover is generally equal to 1/8 of the pipe diameter, not less than 12" although it can be greater in some cases.

紧接侧填充结构两侧应先填充,

好消息是,这种管道变换很容易避免使用推荐安装技巧和回填操作时偶发监听管道几何工作。 和往常一样,咨询您的Contech代理并参考项目中用管产品中可用之安装指南