ABAQUS土体单元划分网格

[img]file:///C:/Users/lenovo/Documents/Tencent%20Files/915738116/Image/R[)%60G4(G]$Z%7DC3FNFOPWOBX.jpg[/img]
这中中间有桩孔的土体采用什么单元，怎么划分网格？