静压桩挤土扩孔的有限元数值模拟研究

FEM numerical simulation of hole expansion caused by driving static pressure pile

对于静压桩沉桩挤土效应的研究,通常应用圆孔扩张理论,但是截面形状仅限于圆形截面。为了扩展其他截面形式的研究,文中将有限元方法运用于沉桩扩孔的模拟,用从初始半径a0的小孔扩张到2a0的过程来等效0-R的小孔扩张过程,和已有理论分析所取的结果进行比较分析,证明FEM对圆孔扩张也是有效的。与圆孔扩张理论相比,可以推广进行其他截面形式的桩扩孔的分析研究,从而扩大了其应用范围。

FEM was taken to analyzing hole expansion due to driving pile, the expansion of a circinal hole with radius change from zero to R equated to expansion from a0 to 2a0. Compared with the acquired conclusion by other researchers, FEM was proved to be effective for hole expansion. Comparing with the traditional theory, the application scope was extended and it can be used to analyze quadrate hole and others.