剪切变形对自升式塔机桁架结构塔身弯曲变形的影响不容忽视。
The effect of shear displacement is not negligible in the buckling deformation of lattice structure in self-lifting tower crane body.
目前普遍使用的自升式塔机有三种基本安装方式：即大混凝土块内安装固定脚，大底盘加压重和行走式的安装方式。
The current widespread use of self climbing tower crane has three basic ways of installation: concrete block installation fixed foot, large chassis heavy pressure and mounting is walking.
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