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埋地管道穿过活动断层区,如何保证管道不被破坏,这是设计中需要考虑的重要问题。通过对管材性能的分析,因考虑到地震荷载的几率较低,故而允许管材进入弹塑性区,这样便由应力-应变关系式,导出了通过活动断层区内的管道是否需要加固的判别式,即视当断层错动引起的管道长度的变化△L≤△L:(或△L_c,压缩时管道允许的最大变化长度)时,管道可不作加固处理;当△L>△L_t(或△L_c)时,管道则需要采取抗震加固措施。文中还介绍了管道通过活动断层区的10条防护措施。
Buried pipe through the active fault area, how to ensure the pipeline is not damaged, this is an important issue to be considered in the design. Through the analysis of the pipe performance, the pipe is allowed to enter the elastic-plastic zone because of the lower probability of seismic load, so that the discriminant of whether the pipe in the active fault zone needs to be reinforced is deduced from the stress-strain relation, That is, when the length of the pipeline changes due to fault dislocation △ L ≤ △ L: (or △ L_c, the maximum allowable length of the pipeline when compressed), the pipeline may not be reinforced; when ΔL> ΔL_t (or ΔL_c ), The pipe is required to take seismic strengthening measures. The article also introduced the pipe through the active fault zone 10 protective measures.