土体沉降引起地下管线破坏的实验性研究
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摘要
针对土体沉降引起管线变形破坏这一现象,运用量纲分析原理导出了其相似判据,指出了相似判据的物理意义,并分析了由此相似判据建立起来的模拟实验的数据。随后,运用量纲分析原理给出了模拟实验管道应力值和实际管线变形破坏值之间的换算关系。
The settlement of soil is one of the main reasons of underground pipeline's damage.To this phenomenon,there are many theoretical researches,but the relevant studies on experimental simulation are less.The research on the similar principles in fluid field is more in-depth and mature than in the other fields,which can be embodied in the fact that there is no such widely recognized criteria in other fields as Reynolds number and Froude number in fluid field.Through the study on the damage of underground pipeline caused by the settlement of soil,the analogy criterion was derived by using dimensional analysis.The specific meaning of analogy criterion was pointed out,and the data coming from the simulation experiment which is established by analogy criterion was analyzed.The conversion relation between the simulation experiment value and the actual pipe deformation value was suggested by using dimensional analysis.
The settlement of soil is one of the main reasons of underground pipeline's damage.To this phenomenon,there are many theoretical researches,but the relevant studies on experimental simulation are less.The research on the similar principles in fluid field is more in-depth and mature than in the other fields,which can be embodied in the fact that there is no such widely recognized criteria in other fields as Reynolds number and Froude number in fluid field.Through the study on the damage of underground pipeline caused by the settlement of soil,the analogy criterion was derived by using dimensional analysis.The specific meaning of analogy criterion was pointed out,and the data coming from the simulation experiment which is established by analogy criterion was analyzed.The conversion relation between the simulation experiment value and the actual pipe deformation value was suggested by using dimensional analysis.
引文
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[2]陈常念,韩吉田,邵莉等.气液两相流动及沸腾传热流体模化分析[J].热科学与技术,2011,10(1):18-23.
[3]李会知,刘敏珊,吴义章.结合工程实例讲授相似理论[J].力学与实践,2005,27:88-89.
[4]冯建刚,成斌,王晓升.基于定理的虹吸式出水管原型和模型虹吸形成时间的相似分析[J].清华大学学报(自然科学版),2011,51(4):503-507.
[5]胡云.基于量纲分析的建模研究[J].大学物理,2006,25(12):18-21.
[6]李国梁,康后金,韩超.深基坑大型物理模拟实验土质相似材料的研究[J].公路,2011,10:184-187.
[7]范鹤,刘斌,范泽,等.高填土涵洞相似材料模型试验与数值模拟[J].吉林大学学报(工学版),2008,38(2):399-403.
[8]易刚,龚代瑜.试论结构模型设计中的相似理论[J].国外建材科技,2004,25(5):38-39.
[9]高惠瑛,冯启民.场地沉陷埋地管道反应分析方法[J].地震工程与工程振动,1997,17(1):68-74.
[10]朱庆杰,刘英利,蒋录珍,等.管土摩擦和管径对埋地管道破坏的影响分析[J].地震工程与工程振动,2006,26(3):197-199.
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