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中文摘要：
砂土原位状态的性能一直以来都难以有效获取,而其体积变化特征的评价指标（状态参数）就是其中重要的一项。利用状态参数（Ψ）来代替相对密实度表征砂土的状态特性是一种新兴的趋势。考虑到砂土状态参数是关于体积变化的评价指标,在砂土地层中,随着围压的增加,砂土剪胀的趋势增加,液化阻力也增加。因此通过状态参数进行砂土液化的判别是可行的。以宿迁—新沂高速公路工程为背景,建立基于孔压静力触探（CPTU）的状态参数、周期阻力比（CRR）和标准贯入击数（N）之间的相关性模型。提出通过砂土的状态参数判别液化的两种新方法。
英文摘要：
The in situ performance of sandy soil and the volume change characteristics of the evaluation index（state parameter）have always been difficult to effectively determine,although these parameters are very important.Using the state parameter（Ψ）to explain the pore pressure static cone penetration test is an emerging trend.Considering that the soil state parameter is related to the volume change of the evaluation index,the sand dilatancy trend and liquefaction resistance in a sandy soil site were increased with an increase in confining pressure.Therefore,it is viable that the state parameter can be used in the soil liquefaction discrimination.In this paper,the SuqianXinyi expressway project is taken as the background,and a relevance model is established among the status parameters of cone penetration test with pore pressure measurement（CPTU）,cycle resistance ratio（CRR）,and standard penetration number（N）.In addition,two types of new methods for estimating sandy soil liquefaction by state parameters are established.
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