【作者】 姚远； 项伟；

【Author】 YAO Yuan XIANG Wei (China University of Geosciences(Wuhan),Wuhan 430074)

【机构】 中国地质大学；

【摘要】 天然状态下的盐渍土性质十分复杂,不利于单一性状的研究。本研究主要对盐渍土的湿陷性问题进行讨论,利用人工配制不同含盐量盐渍土试样进行一系列室内试验,分析含盐量与湿陷性、压缩性之间的规律,研究含盐量对盐渍土变形的影响机理。研究表明:试样的基本物理力学性质随着含盐量的增加呈线性变化,随着含盐量的增加湿陷性与压缩性呈线性增大,在含盐量达到8%时,其湿陷性不同于其他试样,这时土颗粒之间胶结力与斥力之间到达临界值,土体强度达到最高;在对含盐量为0的试样实验数据进行分析发现试样发生溶陷变形的主导因素是压力,在相同的水环境的作用下,上覆压力越大,试样发生溶陷变形的程度就越大。更多还原

【Abstract】 In the natural state saline soil is too complex to research.In this study we discuss the problem of saline soil’s collapsibility and then do series of laboratory test on different salt content samples with artificial saline soil.Using the test data to analysis the laws of salt content between collapsibility and compression,and study mechanism of salt content of saline soil deformation.This research shows in this test the basic physical and mechanical properties of the samples are with the linear increase of the salt content.With the increase of the salt content,the saline soil’s collapsibility and compression with the linear increase.When the salt content of the artificial saline soil is 8%,its collapsibility is different from other specimens.Saline soil salt content of 8%between cementing force and repulsive force of soil particle reached critical value,so the soil strength is at the highest.Analysis on the test data of 0%salt content sample finds the dominant factors of collapsible deformation is pressure.In the same water environment, more pressure,more collapsible happens deformation.更多还原