摘要
基于孔隙气压力等于大气压力的假定,建议了针对非饱和土的简化固结理论。相应的修改了饱和土的有限元程序,用于分析粘土表面干缩裂缝的形成过程。数值分析中将多边形网状分布的裂缝简化为轴对称问题,对土骨架采用弹塑性的双硬化模型进行描述,并分析了不同参数对裂缝宽度和深度影响的敏感性。
A simplified consolidation theory for unsaturated soils was proposed based on an assumption that pore air pressure equaled to the atmosphere pressure. A finite element computer program for saturated soils was revised accordingly in order to be used in the analysis of crack formation and propagation upon drying on the clay surface. In numerical simulation, the distribution of polygonal cracks was simplified as an axisymmetdcal problem with a double hardening elasto-plastic model adopted for soil skeleton. The sensitivities of various oarameters to the width and denth of cracks develoned were also studied
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2006年第2期241-248,共8页
Chinese Journal of Geotechnical Engineering
关键词
数值模拟
干缩裂缝
粘土
非饱和土固结理论
numerical simulation
shrinkage crack
clay
consolidation theory of unsaturated soils
