三亚海相软土次固结特性研究

港口工程建设中经常遇到海相软土地基,海相软土是一种流变性很强的饱和软粘土,次固结变形在总变形中占有一定的比重,次固结系数是用来计算次固结变形量的一个重要参数。现有计算软土次固结变形的常用方法是不考虑荷载对其影响的,大量的试验表明荷载对次固结有较明显的影响。本文以三亚海相软土为例,根据室内试验成果,对其次固结变形特性与荷载的关系进行了分析研究,得出了一些规律性结论,对海相软土地基的设计与工程实践有指导意义。

Study on secondary consolidation properties of marine soft soils in Sanya

The marine soft soils often existed in the foundation of port engineering, which are the saturated soft clay with high rheological properties and the secondary consolidation deformation is of a certain proportion in the total deformation. The coefficient of secondary consolidation is an important parameter used to calculate the amount of secondary consolidation deformation. The conventional methods for computing the secondary consolidation deformation of soft soils do not reflect the influence of loads. However, large numbers of tests show that the secondary consolidation is obviously influenced by loads. Taking the Sanya marine soft soil as the example, the relationship between the characteristics of the secondary consolidation deformation and the loads are analyzed based on laboratory testing data. Some significant conclusions are obtained so as to guide the design and engineering practice of marine soft soil foundations.