表明孔壁粗糙度越大，相应的桩侧阻力就越大，从而提高钻孔灌注桩的承载力。
The result shows that bigger hole coarsenesses have bigger side pile resistance so as to improve the bearing capacity of bored - pile.
工作台进给的平稳性会影响孔壁的表面粗糙度，严重时会影响孔的尺寸精度。
The stability of the worktable will affect the surface roughness of the hole wall, which will affect the hole size precision seriously.
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