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埋地管道地震作用下的破坏因素源于地震引起的永久地面变形(PGD),其中管道-土体间相互作用决定土体位移作用到管体的大小。利用离心机试验技术模拟埋地管道在逆断层大位移下的反应特性,重点讨论断层与管道的交角、断层位移大小、管土相互作用、管径和埋深五个参数对管道破坏的影响水平。实验结果表明:上述参数对管道断层作用的反应均有明显影响,其中断层的位移量、管土相互作用、埋深和管径的影响更为显著。本文的研究结果对于管道经过断层区的抗震设计有十分重要的意义。
The damage factors of buried pipeline under earthquake are caused by earthquake-induced permanent ground deformation (PGD), in which the pipe-soil interaction determines the displacement of soil to the size of the pipe. Centrifuge test technique was used to simulate the reaction characteristics of buried pipeline under the action of large thrust displacements. The influence of the five parameters such as the intersection angle of fault and pipeline, the displacement of the fault, the interaction between soil and pipe, the diameter of pipeline and the depth of buried pipe was mainly discussed . The experimental results show that the above parameters have a significant effect on the response of pipeline faults, and the displacement of faults, the interaction between soil and pipe, the depth of buried pipe and the diameter of pipe are more significant. The results of this paper are very important for the seismic design of pipeline passing through the fault zone.