Florida Power & Light Co.

Port Everglades, FL

A routine inspection of the 350’ x 24’-4” concrete chimney identified severe cracking and partial collapse of the pilasters on both sides of one of the flue opening in the brick liner. The restrict work space and precarious condition of the collapsing brickwork prevented personnel from attempting a piecemeal demolition. The possibility of a wholesale and simultaneous collapse of both pilasters added concerns that such an event might of trigger additional lining failure within the tight annular space.

Jansons developed an innovative plan to execute a piecemeal demolition of each of the pilasters using hydraulic jack system and then implemented necessary stabilization repairs. Project highlights included:

  • Reinforcing the lower 15’ section of brick liner with timbers and a sand base prior to demolition
  • Design and construction of an internal frame system for the hydraulic jacks
  • Controlled collapse of the brick pilasters using remotely operated hydraulic jacks
  • Piecemeal hand-demolition of loose brickwork after the hazard was removed
  • Reconstruction of the pilasters and brick lining using a combination of brickwork and a structural grade polymer concrete

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