硫酸盐渍土盐胀特性试验及分析  

Experimental Researches and Analysis of ExpansionCharacteristics of Sulphate Salty Soil

作　　者：刘娉慧[1] 王俊臣[1] 蒋剑[2] 王常明[1] 

机构地区：[1]吉林大学建设工程学院,吉林长春130026 [2]广东省物料实验检测中心,广东广州510080

出　　处：《吉林大学学报（地球科学版）》2005年第1期74-78,共5页Journal of Jilin University：Earth Science Edition

基　　金：国家自然科学基金项目(40172092)

摘　　要：硫酸盐渍土分布广泛,其盐胀特性给工程建设带来诸多困难,以往许多这方面的研究多是通过向非盐渍土中掺入不同比例的盐分,人工制备成盐渍土样进行,且仅侧重于盐胀率的测试和分析,对盐胀压力的研究很少。结合硫酸盐渍土地区工程现场出现的渠道面板胀裂变形等问题,取样天然硫酸盐渍土,对单因素影响下的硫酸盐渍土膨胀率进行测试和分析,对各因素作用下的盐胀机理加以分析,并对法向膨胀力进行测试,与非盐渍土的冻胀力进行对比后,发现硫酸盐渍土具有较大的法向盐胀压力,建议设计分析中需在试验的基础上考虑盐胀的影响。Sulphate salty soil is wide spread and its’ expansion behaviors bring many difficulties to engineering construction. In the past, the researches on the sulphate salty soil emphasized particularly on expansion rate on the basis of artificial samples. Expansion rate under single factor has been measured and expansion mechanics has been analyzed on the basis of original sulphate salty soil. Moreover, normal expansive force was measured and was compared with frost-heave force of non-salty soil. It was found that normal expansion force of sulphate salty soil need to be considered in the engineering construction.

关 键 词：硫酸盐渍土 盐胀 盐胀压力 

分 类 号：P642.13[天文地球—工程地质学]