跨断层地下管线振动台模型试验研究Ⅱ:试验成果分析  

Shaking table test of fault-crossing buried pipelines Ⅱ: test results

作　　者：张志超[1] 王进廷[1] 徐艳杰[1] 

机构地区：[1]清华大学水沙科学与水利水电工程国家重点实验室,北京100084

出　　处：《土木工程学报》2011年第12期116-125,共10页China Civil Engineering Journal

基　　金：国家自然科学基金(40974063);北京市自然科学基金(8082014)

摘　　要：针对跨断层地下管线进行振动台模型试验研究。试验中将钢管埋设在一个盛装砂土、可以模拟走滑断层错动作用的模型箱中,研究地下管线在承受断层错动时应变的分布规律和管周动土压力变化规律,并考察地下管线与断层的夹角以及管内水体的影响。试验结果表明:在跨断层地下管线中,管-土系统本身的动力效应的影响较小,可以忽略不计,而管内液体可能有较大的影响,不可忽略;在无法避开断层区域的情况下,地下管线最好与断层垂直;管线的最大应变发生在断层附近一定距离的位置;管-土动力相互作用及其变化规律对管道响应影响很大。A shaking table test for fault-crossing buried pipelines is implemented. The pipes are buried in a container which is filled with sandy soil and can simulate the movement of a strike-slip fault. The strain and deformation of the pipes and the pressure between pipe and soil are analyzed. The effects of the fault-pipe angle and the water in pipe are also investigated. According to the test results, the dynamic effect of the pipe-soil system is relatively unimportant and can be neglected, but the impact of the liquid in pipe cannot be always neglected. When fault cannot be avoided, the pipelines are better placed perpendicularly to the fault. The maximum strain always occurs at some distance away from the fault. The dynamic pipe-soil interaction may significantly impact the pipes.

关 键 词：地下管线 振动台试验 断层错动 土体 应变 

分 类 号：P315.9[天文地球—地震学] TU435[天文地球—固体地球物理学]