砂土密实度的成因分析及其评价方法的探讨

砂土的密实程度是影响其工程性质的重要因素，评价砂土密实度的方法很多，但所得结果可能有差异．通常认为这是试验方法不同引起的试验误差。实际上砂土的成因及埋藏条件、地下水也是影响砂土密实度的重要因素。承压水的承压力会改变土中有效自重应力的分布，致使砂土密实度出现反常现象。工程中应注重砂土密实度的成因分析，运用理论知识．分辨各种评价方法的适用条件及其优缺点。

Formation Reasons for Sand Density and Study of Evaluation Methods

The density of the sand is important factors for their engineering properties, the evaluation methods of sand density is more, but the results may have differences, usually means, this is testing error that is caused by different testing method. In fact, the causes of the sand formation and buried conditions, groundwater is also the important factors. The distribution of effective stress in the soil will be changed by the pressure of the confined water, and the anomaly of sand density may he formed. Project should focus on the analysis of the formation reasons for sand density, according to theoretical knowledge, to identify applicable conditions of various evaluation methods and their advantages and shortcoming.