油料洞库主罐室地震作用破坏机理

摘要

Oil storage cavern plays an important role in storing oil for the future use. To further study the earthquake response law in the main tank room of oil storage cavern,numerical analysis of the simplified model of oil storage cavern is conducted with dy-namic timing method and FLAC3D software. The horizon hump displacement and hump of max tension stress under earthquake are analysed in the following three aspacts:different rock groups,different depths and different earthquake intensity. The results show that the earthquake resistance of the oil storage cavern gradually improves as the rock groups change fromⅢto I and the depth in-creases;the hump of max tension stress occurs in the corner between the main tank room and subchannel handover under all work-ing conditions;When the 9 degree earthquake occurs,the horizon hump displacement of each monitoring site substantially increases and the plastic zone is opened,therefore,the areas of where 9 degrees and above earthquakes might occur should be avoided in the site selection of oil storage cavern.%油料洞库担负着我国未来石油储备的重要任务，为深入研究油料洞库在地震作用下的响应规律，运用FLAC3D软件，采用动力时程法对油料洞库的简化模型进行数值模拟分析。从不同围岩级别、不同埋深、不同地震烈度3个方面分析地震作用时水平峰值位移和最大拉应力峰值的变化规律。结果表明：随着围岩级别从Ⅲ级到Ⅰ级的变化以及埋深的增加，油料洞库的抗震性能逐渐提高；无论何种工况，最大拉应力峰值均发生在主罐室与支通道交接的墙角处；9度地震时各监测点水平峰值位移大幅增加，塑性区已经贯通，故在油料洞库选址时应尽可能避开可能发生9度及以上地震的地区。