坍塌和冲沟作用下埋地管道大变形分析  

Large deformation analysis of buried pipelines under the condition of collapse and gulch

作　　者：童华[1] 祝效华[1] 练章华[1] 陈小榆[1] 谢凌[2] 

机构地区：[1]西南石油大学机电工程学院 [2]中国石油西南油气田分公司重庆气矿

出　　处：《石油机械》2007年第11期29-32,81,共4页China Petroleum Machinery

基　　金：国家博士后科学基金的资助(20060391034)

摘　　要：埋地管道在坍塌、冲沟两种典型的地质破坏作用下可能会发生纵、横向大变形,由此造成管道的断裂,从而对埋地管线的正常运行构成威胁。因此,详细地分析这两种典型地质破坏作用下的埋管大变形具有非常重要的工程意义。将处于坍塌、冲沟作用下的管段视作受常值当量轴力S作用的大挠度梁,根据管道的纵横弯曲性质,并结合管梁几何方程的非线性进行埋管的大变形理论分析,推导得到变形位移和内力的计算公式。再结合专业管道应力分析软件CAESAR Ⅱ,以西气东输工程用管为例进行仿真计算,对理论分析的结果进行对比、验证,从中总结出一系列重要结论,并提出了几点相关建议。The large transverse and longitudinal deformations of buried pipelines may be caused by two types of critical geological devastating effects as collapse and gulch, and the rupture of buried pipelines may be caused, and so forth it may threaten the normal function of pipes. Therefore, it has very important engineering significance for detailed analysis on large deformation of buried pipelines under such effects. The pipeline is regarded as large displacement beam, and longitude force, S is regarded as constant parameter. In terms of property of transverse and longitudinal bend, combining with nonlinear geometry equations, formulas of deformation displacement and internal force have been deduced by the large deformation analysis. Meanwhile, the emulation calculation has been made by taking the pipeline of nature gas transportation engineering from west to east by using professional software of pipelines, and thus contrast and validation have also been made. A series of very important conclusions and some suggestions have been summed up for the instruction of engineering practice.

关 键 词：埋地管道 地质破坏作用 大变形 非线性 仿真分析 

分 类 号：TU746.1[建筑科学—建筑技术科学]