基于有限元强度折减法的H-V加筋地基破坏机理

Bearing Capacity Behavior and Failure Modes of H-V Reinforcement Foundation Based on Strength Reduction Finite Element Method

基于边坡稳定性分析中的有限元强度折减法,利用ABAQUS软件对纯砂地基、水平加筋地基和水平与竖向(H-V)加筋地基进行多组数值模拟.采用安全系数分析H-V加筋地基对地基承载力的影响,通过ABAQUS软件后处理功能观察地基在强度折减系数增大过程中塑性区的扩展情况及最后破坏时的破坏面,并对不同加筋地基的破坏模式进行分析.结果表明:H-V加筋能使地基承载力得到大幅提高;地基的破坏模式因加筋体的存在而发生一定程度的改变;在同等试验条件下,H-V加筋效果高于水平加筋,单层H-V加筋地基的加筋效果随加筋深度的增加而减弱.

Based on finite element strength reduction in the slope stability analysis,the foundation of non-reinforced ground,level reinforced foundation and a new reinforcement（horizontal-vertical,referred to as H-V） foundation were multiple simulated by ABAQUS software.The effect of H-V reinforced foundation on foundation bearing capacity was analysed by using safety factor Fs.The development of plastic zone and the final destruction of the failure surface in the increasing process of the foundation of strength reduction coefficient can be obtained by using ABAQUS post-processing functions.The results show that foundation bearing capacity can be greatly improved because of reinforcement H-V,ground failure mode would have some degrees of changes because of H-V reinforcement.