Stability of Loosely Fitted Liners Used to Rehabilitate Rigid Pipes
Stability of Loosely Fitted Liners Used to Rehabilitate Rigid Pipes
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DOI：
10.1061/(asce)0733-9445(1998)124:11(1350
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发表时间：
1998-11
期刊：
影响因子：
--
通讯作者：
K. El-Sawy;I. Moore
中科院分区：
文献类型：
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作者：
K. El-Sawy;I. Moore
刚性管道内衬已成为传统管道更换的一种有竞争力的替代解决方案。由于衬管安装过程的性质，最终衬管可能会松散地安装到受损管道中。衬管应能安全承受地下水产生的任何外部压力。本研究考虑圆形内衬与圆形主管之间的初始间隙对临界屈曲压力的影响。本文用有限元法计算了松配合圆衬的临界压力。假设圆形内衬和主管之间的界面是光滑的。简要描述的有限元模型和分析，其次是间隙的大小和衬垫的厚度与半径比的衬垫的稳定性的影响的参数研究。本研究的结果以适合设计目的的形式报告。工作包括作家的数值解和以前的t之间的比较。
Lining of rigid pipelines has emerged as a competitive alternative solution to conventional pipeline replacement. Due to the nature of the liner installation process, the final liner may end up being loosely fitted into the damaged pipeline. The liner should safely carry any external pressure due to the ground water. This study considers the effect of an initial gap between the circular liner and the circular host pipe on the critical buckling pressure. The finite-element method is used for the evaluation of the critical pressure for loosely fitted circular liners. The interface between the circular liner and the host pipes is assumed to be smooth. A brief description of the finite-element model and the analysis is given, followed by a parametric study for the effect of gap size and liner thickness-to-radius ratio on the stability of the liner. The results of this study are reported in a form suitable for design purposes. The work includes comparisons between the writers' numerical solution and previous t...