Scope | Solutions

 

SGH helped evaluate the following:

  • Issues with tremie placement for an underwater cofferdam seal that compromised concrete quality

  • Contractor concerns about a concrete mix for approach span pier pile caps and bascule span fender beams

  • Plugged concrete pumplines during placement of the east bascule pier pile cap in cold weather

  • Mass concrete placements

 

Over the course of these projects, SGH completed the following:

  • Investigated tremie failure and blocked pumplines

  • Determined the cause of the failed mass concrete placement in the cofferdam seal

  • Performed petrographic analysis, adiabatic heat signature testing, and thermal simulations at varying placement temperatures, weather conditions, and curing periods

  • Modeled heat generation during curing

  • Retrieved and tested concrete core samples

  • Designed and tested physical properties of a replacement tremie concrete mix and monitored a trial placement

  • Proposed concrete aggregate and mixes to suit each project

  • Specified tremie and mass concrete sequencing and placement methodology

  • Recommended ways to avoid freezing pumplines, including increasing the concrete temperature, insulating pumplines, and filling the pumplines with hot water prior to pumping the concrete

  • Monitored concrete placements for the 2002 and 2004 projects

Project Contact(s)