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多次强烈地震的经验指出,地震时出现的震害异常,往往是由于建筑场地条件的差异造成的。1976年唐山地震使天津市遭受到相当大的破坏,出现了许多“轻中有重,重中有轻”的震害异常现象,如天津市南郊区的“西三合一前三合”及白塘口等地区的震害异常,就是这种情况的典型例子。为了探索造成震害异常的原因,研究场地条件与震害的关系,在这二个地区进行了钻探,波速测定,脉动测量和地震动的计算分析,探索了综合研究场地影响的途经和方法。
The experience of several strong earthquakes indicates that the earthquake damage that occurred during the earthquake was often caused by differences in the conditions of the construction site. The Tangshan earthquake in 1976 caused considerable damage to the city of Tianjin. There have been a number of “early, light, heavy, medium, and light” earthquake damage anomalies, such as the “West Sanhe first Sanhe” in the southern suburbs of Tianjin. The abnormal earthquake damage in areas such as Baitangkou is a typical example of this situation. In order to explore the causes of earthquake damage anomalies, the relationship between site conditions and earthquake damage was studied. Drilling, velocity determination, pulsation measurement and ground motion calculation and analysis were conducted in these two regions to explore ways and methods for comprehensively studying site impact.