东京都土木技术研究所于1987年4月30日结束了“东京低洼地区液化现象预测”的调查。此次调查对如果发生关东大震那样的巨大地震时,作为造成建筑物倒塌等原因的地基液化现象容易在东京都内哪些地区发生这一问题进行了调查预测。根据除新宿、杉并以西的台地和东京湾沿岸填土建造的地区以外的市中心和工商业者居住区等低地的14个区为对象的调查结果预测,有约四分之一的地区发生液化现象的可能性很大,特别集中在松软地基多的中川、古隅田川、多摩川等5条河流的沿岸。正 Tokyo Institute of Civil Engineering and Technology concluded an investigation on liquefaction in low-lying areas in Tokyo on April 30, 1987. The survey conducted a survey on the issue of liquefaction of the foundation where liquefaction of the foundation caused by the collapse of a building is easy to occur in which areas in Tokyo at the time of the huge earthquake such as the Kanto Earthquake. According to the survey results of 14 districts in the lowlands such as Shinjuku, Suginami west of Tokyo, and areas outside the Tokyo Bay coastal area, residential areas and commercial areas, it is estimated that about one quarter of areas are liquified Phenomena are highly probable, with a special focus on the shores of five rivers, such as Nakagawa, the ancient Sumida River and the Tama River, where soft ground is found. positive