基于ANSYS 8．0的挤密桩应力分析

结合大型有限元分析软件ANSYS 8．0对挤密桩挤密成孔过程进行三维有限元模拟，在土体参数一定的条件下，通过逐渐增大孔壁挤压力分析桩周土体的应力变化情况：通过非线性迭代计算，得出孔壁挤压力极限值及其对应的塑性挤密半径．从而分析桩周土体挤密效应随应力增加变化的规律。分析结果能更准确地反映挤密桩挤密成孔过程桩周土体的受力状态．为进一步研究挤密桩综合作用效应提供了一定的参考依据。

Closely Compacted Pile Stress Analysis Based on ANASYS 8.0

Based on the large finite element analysis software ANSYS 8.0, three-dimensional finite element simulation of closely compacted pile during the hole formation has been done. Through augmented extrusion force gradually, analyzes the variation of soil stresses around the compacted pile when the soil parameter is certain. Through nonlinear iteration computation, the limit bearing capacity under different cases and the corresponding plastic closely compacted radius have also been obtained. Analyses the variation regular of the soil compaction effect around the pile as the extrusion force changing. The obtained results can reflect the soil stress around pile more accurate during the hole-forming, and have offered certain reference for comprehensive function study of closely compacted pile.