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根据国家地震部门的鉴定,成都市的地震基本烈度定为7度。对成都地区今后可能发生地震时砂土地基是否可能产生液化及其对建筑物的危害性作出正确的预测,已成为成都市当前大规模建设事业中面临的需要解决的课题之一。本文从研究成都地区砂层的分布、埋藏条件及性质着手,根据国内外已有震例的分析和对砂土液化机理的认识,结合成都地区的具体条件,试图探索成都地区砂土液化的可能性、分布规律和危害程度。需要说明的是,本文所指成都地区的范围仅包括成都市区及其近郊。对于面积更大一些的整个成都平原地区,则不在本文所讨论的范围之内。
According to the identification of the national earthquake department, the basic earthquake intensity in Chengdu is set at 7 degrees. It is one of the topics to be solved in the present large-scale construction in Chengdu that whether it is possible for liquefaction of the sand foundation and the danger to the buildings in the future may occur in the earthquake in Chengdu. Based on the analysis of the existing earthquakes at home and abroad and the understanding of the mechanism of sand liquefaction, this paper tries to explore the possibility of sand liquefaction in Chengdu area based on the specific conditions in Chengdu area Sexual, distribution and hazard levels. It should be noted that the scope of Chengdu in this paper only covers the urban area of Chengdu and its suburbs. For the larger area of the Chengdu plain, it is beyond the scope of this article.