化学效应下的砂岩蠕变机理  

Creep mechanics of sandstone with chemical effect

作　　者：易富[1] 李军[1] 孙迪[1] 

机构地区：[1]辽宁工程技术大学土木与交通学院,辽宁阜新123000

出　　处：《辽宁工程技术大学学报（自然科学版）》2015年第3期369-372,共4页Journal of Liaoning Technical University (Natural Science)

基　　金：辽宁省教育厅科研基金资助项目(L 2013144)

摘　　要：为研究长期处在外界复杂的化学环境中砂岩变形机理,针对长期处在外界环境中的砂岩发生的蠕变具有化学效应这一事实,通过室内试验数据分析,采用Kelvin体流变模型建立了蠕变方程,利用泰勒级数建立了蠕变方程中参数与化学因子的拟合多项式,利用基于搜索模式的最小二乘原理(LSMPS)求得了具有化学效应蠕变方程力学参数的最优解;分析了化学效应随时间对砂岩蠕变作用机理.结果表明:化学效应对砂岩颗粒间的作用既有水的软化又有离子吸附与化学反应.In order to study sandstone deformation mechanism in the complex chemical environment outside for a long time, and in view of the fact that sandstone long in external environment creep with chemical effect, this paper utilized least-square based on search pattern theory（LSMPS） to find out the optimal solution to mechanical parameters of creep equation with chemical effect through indoor test data analysis, established creep equation using the Kelvin rheological model body, established polynomial fitting of parameters of creep equation and chemical factor using Taylor＇s series, and analyzed sandstone creep mechanism with chemical effect over time. The conclusion shows that the influence of chemical effect includes both softening of water and ions adsorption and chemical reaction between sandstone particles.

关 键 词：化学效应 蠕变 搜索模式 砂岩 流变模型 泰勒级数 

分 类 号：TU452[建筑科学—岩土工程]