土壤震陷试验研究

本文是笔者就土壤震陷特性所做的十几年试验研究的总结。文中讨论了关于土壤震陷的定义和影响因素。试验研究表明,主要影响因素有四个:动应力,初始固结压力,振动次数和土的类型。软土的震陷表现为残余变形的逐渐增大,砂性土的则表现出震陷突变特点。给出了能反映震陷特性的经验表达式,并把各土壤的震陷参数与土的物性指标,例如含水量、相对密度、压缩模量和剪切波速等建立了关系,供无试验资料时选用。

Experimental Investigation of Soil Settlement Due to Earthquake

In this paper, the definition of seismic settlement is given, and its influencing factors, including dynamic stress, initial consolidation pressure, cyclic number and soil type, are discussed.It is shown by the tests that, under seismic action, the soft soil presents a gradually increasing residual settlement, while the cohesionless soil shows an abrupt settlement. Empirical expressions of seismic settlement in terms of test parameters and physical indices of soil are given, which can be used when no test data are available.