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Rigid and Flexible Pipes

机译:刚性和挠性管

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In addition to the importance of accounting for the soil load on buried pipe (dead load), it is also important to account for live loads, whenever applicable, such as moving vehicles (live load) when a pipe is buried under a highway or railroad embankment. One way in which this is done is by use of modified Boussinesq equations, details of which were not discussed in this article. It is important to remember that the concern for soil pressure on a pipe is limited to empty pipe or gravity flow pipelines where the conduit never flows full. In municipal pressure piping systems, where the internal pressure is typically much greater than external soil pressure, the former supports the latter when the line is placed into service. For larger diameter flexible pressure pipelines however, it is always appropriate to run a check that the soil conditions are appropriate to limit the pipe's allowable vertical deflection as permitted by specification and to prevent any damage to rigid linings and/or coatings due to excessive deflection.
机译:除了考虑埋地管道上的土壤负荷(静负荷)的重要性外,在适用时还应考虑活负荷,例如管道埋在高速公路或铁路下时的移动车辆(活负荷)堤。完成此操作的一种方法是使用修改后的Boussinesq方程,本文中不再讨论其详细信息。重要的是要记住,对管道上土壤压力的关注仅限于空管道或重力流管道,在管道中管道永远不会充满。在市政压力管道系统中,内部压力通常远大于外部土壤压力,当管道投入使用时,前者会支持后者。但是,对于较大直径的挠性压力管道,始终应检查土壤条件是否适当,以限制规格允许的垂直挠曲,并防止由于挠曲而损坏刚性衬里和/或涂层。

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  • 来源
    《Trenchless Technology》 |2010年第11期|p.36-3840-42|共6页
  • 作者

    Shah Rohman;

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  • 正文语种 eng
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