Overland conveyors and trestle towers often require solutions to accommodate significant uplift loads and overturning moments. Foundations for conveyors align themselves perfectly to screwpiles because there are generally large quantities required. The speed in which screwpiles in this situation can be installed promotes their cost effectiveness.
A variety of connection methods to modules and trestles are available. Options include direct weld connections through to
small concrete pile caps. Conventional methods of anchoring pipeline structures to the ground are not only costly and slow
but carry inherent problems for the future applying enormous pressure on
ongoing maintenance budgets. These problems include moisture entrapment
between the concrete overhead cap anchor and the pipeline causing-:
- The pipeline to corrode in a relatively short period.
- The steel reinforcing locking bars within the
overhead corrode exploding the concrete due to extreme environmental
temperature fluctuations
Other problems such as corrosive and flood prone
environments such as salt flats and flood plains present further problems for
conventional methods of anchoring. Steel frames are prone to corrosion at the
intersection with concrete, requiring entire foundation and structure
replacement. Flowing volumes of water undermine conventional foundations
causing subsequent pipeline damage.
Screwpiling offers a one machine and procedural
operation of anchor foundation installation. Pre-drilling can be carried out
with the same machine should hard soil conditions be encountered. The
use of screwpiling resulted in a general cost saving of 250% compared to
conventional anchor methods. Construction productivity was increased by a
massive 1200%. Future related corrosion maintenance budgets virtually
eliminated over the next 75 years.
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