基于ABAQUS的真空预压插板深度的研究

Research on Depth of Vacuum Preloading Plug-board Based on ABAQUS

通过ABAQUS大型有限元软件模拟了实际工程中的部分加固过程,验证了此类工程数值模拟的可行性。ABAQUS有限元软件计算的地基沉降规律和沉降值与实测结果非常接近,其中不一致部分为简化计算引起的误差。通过模拟不同插板深度的加固,对比了对应深度的加固效果,分析了底层的固结沉降效果。得出真空预压插板深度的变化会对工程加固效果产生影响,其中对底层土体影响较为显著;排水板打设穿过目标软基底部一定深度可有效提高底层土体固结度,进而提高软基整体加固效果。

Large-scale finite element software ABAQUS has been used to simulate partial reinforcing process of real projects, which proves the feasibility of numerical simulation. The settlement regularity and sedimentation value obtained by using ABAQUS finite element software basically accord with the measured results, and the inconformity of data comes from the deviation caused by simplified calculation. By simulating the reinforcement process based on different depths of plug-board, the reinforcement effects are compared each other, and the consolidation settlement effects of bottom layer are analyzed. The research results show that the depth variation of vacuum preloading plug-board affects the reinforcing result, especially the soil body at bottom. To drive drain board into soft base to a certain extent can effectively improve the consolidation degree of soil body at bottom, and enhance the integral reinforcing effect of soft base.