淤泥质软土动态流变特性与流变参数研究  

Research on dynamic rheological characteristics and rheologic parameters of sludge soft soil

作　　者：胡华[1] 顾恒星[1] 俞登荣[1] 

机构地区：[1]厦门大学土木工程系,厦门361005

出　　处：《岩土力学》2008年第3期696-700,共5页Rock and Soil Mechanics

基　　金：国家自然科学基金资助(No.50678155);福建省高等学校新世纪优秀人才支持计划项目

摘　　要：实际调查和理论分析表明,软弱岩土具有流变特性,动态载荷作用加速了软弱岩土的流变行为,成为诱发岩土地质灾害的重要因素和主要动力。在测试分析动载作用下淤泥质软土的流变力学特性基础上,建立了动态黏弹塑性流变力学模型和流变方程,推导出动态流变参数计算式;通过测试,分析了动态剪切作用频率、动态剪切应变、淤泥质软土含水率等因素对动态流变参数影响特性。研究结果对揭示动载作用下淤泥质软土动态流变特性与流变参数影响变化规律,探索软弱岩土突发地质灾害的流变动力学机制等具有一定的理论和现实意义。The practical investigation and theoretical analysis indicate that the soft rock-soil has rheological characteristics; the dynamic loading can accelerate rheological action of soft rock-soil, and become the important factor and primary power which induce geotechnical engineering disaster and geological disaster. The dynamic rheological characteristic of sludge soft soil are tested; the dynamic viscoelasto-plastic rheological model and rheological equation are established; and the expression of dynamic rheologic parameters are deduced. The dynamic rheological parameters of sludge soft soil are tested under dynamic shear action; the influential characteristic is analyzed that the factors such as dynamic shear frequency, shear strain, water content of sludge soft soil, etc. effect dynamic rheological parameters of sludge soft soil. The research results have actual significance for us to open out the influence disciplinarian of rheological mechanism characteristics and rheological parameters of sludge soft soil under dynamic loading. It has also important academic significance for us to find out rheological dynamics of soft rock-soil bursting out geotechnical engineering disaster and geologic disaster.

关 键 词：动态载荷 淤泥质软土 动态流变力学特性 动态流变参数 岩土地质灾害 

分 类 号：TU447[建筑科学—岩土工程]