基于均匀设计的砾类硫酸盐渍土盐胀特性试验研究

为了深入研究盐渍土地区粗颗粒盐渍土的工程特性及其作为路基填料的可用性指标，从盐胀的主要控制因素土、水、盐、温、力5个方面，采用均匀设计方法，通过一系列的室内单次降温盐胀试验，研究了砾类硫酸盐渍土的盐胀特性及其盐胀规律。试验结果表明，影响砾类硫酸盐渍土盐胀量大小的主要控制因素是含盐量、含水率及其初始干容重，且这3个因素互为联系彼此影响，上覆附加荷载对盐胀量大小的增长具有很强的抑制作用；粗颗粒盐渍土盐胀增长活跃温度区间主要为-5-5℃，其活跃温度区间主要控制因素是含水率；如果土样初始干客重较低，盐胀过程中土体会发生体缩现象。

Experimental Study on Salt Expansion of Gravel Sulfate Salty Soil Based on Uniform Design

In order to research salt expansion characteristics and the applicability index of roadbed padding in crude grain salty soil in saline soil region,from the controlling factors of salt expansion which are soil,water,salt,temperature and pressure,the salt expansion characteristics and law of gravel sulfate salty soil were mainly studied with the single temperature-lowering salt expansion experiment based on uniform design.The experimental result shows that(1) the main controlling factors of salt expansion whi...