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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。
Based on the assumption that pore pressure is equal to atmospheric pressure, a simplified consolidation theory for unsaturated soils is proposed. Correspondingly, the finite element program of saturated soil was modified to analyze the formation of shrinkage cracks on clay surface. In the numerical analysis, the fractures with polygons mesh distribution are simplified to axisymmetric problems. Elastic-plastic dual-hardening model is used to describe the soil skeleton, and the sensitivity of different parameters to the influence of crack width and depth is analyzed.