可液化地基土性分类对比研究

Research on the Comparison of the Sort of Liquefaction Soils

地震液化现场原位实测数据是地基液化判别方程建立的主要依据之一。在常见的可液化地基土中,粉土与砂土的液化特性差异较大,使用世界范围内不同地区的地震液化现场实测数据时,就存在土性分类标准的匹配问题。笔者搜集了世界范围内19次大地震106个场地共509组基于静力触探指标的地基液化现场实测数据,并将我国的基于静力触探指标的土性分类标准与通行于欧美的土性分类标准进行了对比分析。结果表明,二者在对可液化的粉土和砂土的区分上存在较高的一致性,为利用不同地区的地震液化现场实测数据进行液化标准的研究提供了理论依据,具有较强的工程实践意义。

The field testing liquefaction data is one of the major foundation data to establish a model of evaluating the liquefaction of soils. But the classification criterions of soils in different country differ from each other. Thus, when the field testing liquefaction data from the various areas around the world are simultaneously employed to build a model to access the soil liquefaction, a extremely crucial issue appears that whether the different criterion can be matching. On the basis of the field testing liquefaction data of cone penetration test from 19 strong earthquakes around the world, the two major classification criterions are compared with each other. The result indicates that the extreme consistency exists in them, which provides an important theoretic foundation to employ various field of testing liquefaction data around the world.