Q_3黄土的一维扰动演化规律试验研究  

Experimental Study on One-dimensional Disturbed Evolution Law of Q_3 Loess

作　　者：徐亚利[1] XU Yali(School of Architecture and Civil Engineering,Hefei University Hefei 230601,China)

机构地区：[1]合肥学院建筑工程系,安徽合肥230601

出　　处：《皖西学院学报》2018年第5期110-114,共5页Journal of West Anhui University

基　　金：安徽省高校优秀青年人才基金项目(2012SQRL195);2013年度合肥学院引进人才科研基金项目(13RC10);安徽省高校自然科学研究项目一般项目(KJ2013B223);2017年安徽省高校省级质量工程项目(2017zhkt383)

摘　　要：针对黄土的欠压密性、高强度和水敏性等特点,设计并进行了五种不同含水量下侧限压缩试验,以揭示结构性对其压缩特性的影响。基于扰动状态理论,结合原状土和重塑土压缩曲线特点,以孔隙比为参变量定义扰动函数,并对其扰动函数及其演化规律进行分析。研究结果表明:该扰动函数符合指数函数,且含水量对扰动函数中参数A的影响符合指数函数,对扰动函数中参数B的影响符合幂函数。为此,本文构建的一维扰动函数及扰动演化规律对结构性黄土的固结与地基沉降计算可提供一定的理论基础和参考价值。Due to the characteristics of loess,such as incomplete consolidation and high strength and water sensitivity,the confined compression test is designed and carried out in five kinds of different water content in order to reveal the influence of structure on the compression characteristics of loess.Based on theory of the disturbed state,and combined with the compression curves characteristics of intact loess and remolded loess,the disturbance function is defined with the porosity ratio as the parameters,and then the disturbance function and the evolution law is analyzed,and a one dimension disturbed state compression model of loess is constructed.The results of the research show that：the disturbance function is accord with the exponential function,and the influence of the water content on the parameters A of the disturbance function is accord with the exponential function,and the influence of the water content on the parameters disturbance B of the disturbance function is accord with the power function.Based on the disturbed state concept theory,a one-dimensional compression model of loess is constructed,which provides a theoretical foundation for compression consolidation and calculation of the foundation settlement.

关 键 词：黄土 结构性 扰动函数 演化规律 

分 类 号：TU44[建筑科学—岩土工程]