钻机底座立柱为箱形焊接结构，是整个钻机的支撑构件。
The column of drill base is a trunk welding structure, and it is important to support the whole drill.
实践表明，反变形法和加支撑刚性固定是控制这种大型特厚壁结构焊接变形的有效方法。
The practice have proved that the anti -distortion plus with rigid fixing are the effective measures for controlling the distortions of this huge welding structure.
支撑结构的组装可用螺拴、铆钉或焊接。
The supporting structure may be assembled with Bolts or rivets or by welding.
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