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扁铲侧胀试验(DMT)目前在工程勘察中应用越来越广,其在判别土类,确定粘性土的状态、静止侧压力系数、水平基床系数等方面已经比较成熟。但应用DMT判别砂土液化是一种新兴的方法,欧美一些国家在工程中已经得到应用,但我国目前应用DMT判别砂土液化仍处于研究发展阶段。本文对比了目前扁铲侧胀试验(DMT)与标准贯入试验(SPT)及国外广泛采用的Seed法在砂土液化判别中的特点,通过工程实例的大量试验数据,总结了DMT判别砂土液化的有效性及存在的问题,为DMT判别砂土液化的理论研究及推广应用提供一定的借鉴作用。
Flat dilatometer test (DMT) is widely used in engineering survey at present. It has been quite mature in determining soil type, determining the state of cohesive soil, static lateral pressure coefficient and horizontal bed coefficient. However, the application of DMT to distinguish sand liquefaction is an emerging method. Some countries in Europe and the United States have already been applied in engineering. However, the present application of DMT to determine sand liquefaction is still in the research and development stage. In this paper, we compare the characteristics of the current DMT and SPT tests and the Seed method widely used in foreign countries in judging sand liquefaction. Based on a large number of experimental data of engineering practice, The effectiveness of liquefaction and the existing problems, provide a reference for DMT theory research and popularization and application of sand liquefaction.