| 摘要 |
An existing tower has a set of legs and a large number of lacings which secure the legs to one another. An augmentation tower is located concentrically outside of the existing tower and also has a set of legs and lacings for joining its legs together. Each of the towers has its own foundation. Each of the legs of the augmentation tower is made up of a number of sections which are spliced together. Braces are spaced apart along the lengths of the legs and are used to fasten the two sets of legs together. After installation, both the existing and augmentation towers are maintained in upright positions with a single set of high-tension guy wires which are connected to the legs of the augmentation tower. The augmentation tower is installed on the existing tower like an exoskeleton and is installed in sections from the bottom of the existing tower upward. The operation of the tower is not impaired during installation.
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