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This practice of walking the equipment also was followed for installation of the soldier beams and tiebacks for reinforcement of the retaining walls. "Since we were performing the work primarily during the summer when the beach is heavily populated, we moved along slowly - about 1 or 2 mph - using flaggers in different areas to make sure our trail remained clear of beachgoers," Lincke said. That's not to say work moved along quickly. Using big tires on the loaders, and having a flagger in front and behind, we didn't have any issues to speak of." Therefore, we decided to scratch the forklift and walk a two-cu.-yd.
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The sands are bad and it's a long distance to the water. "Not so with regards to work on the lower bluff walls near the beach. "When it came to supplying concrete, work on the upper bluff walls was relatively easy due to clear street access," Lincke said.
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Most notably, how to maneuver heavy equipment when access is limited, and beachgoers are many. Beach Poses ChallengesĮmergency beachfront emergency projects pose unique challenges. Props also go out to SANDAG, Lincke said, for its timely vetting and answers to project-related questions. Blue Pacific then completed the wall backfilling and some rebar/concrete work at the face, including the drainage outlets." Thereafter, we began mobilizing with beams and equipment, drilling and completing the piles at beach level. Then it rebuilt the bluff while the lower steel was being mill rolled, drilled for lag bolts in each flange and sent for galvanization. Blue Pacific followed with the installation of the rebar and the pouring of the cap beam. Then we post-grouted, tested, capped and grouted the anchors. "Blue Pacific then excavated for the tiebacks, and we completed the installation of the tiebacks. "With Blue Pacific having prepped the site, CJA installed piles from the tracks under a four-day absolute work window at track level," Lincke said. Linke said Blue Pacific and CJA work closely to ensure expeditious engineering. The contracted beach walls also have wood lagging between the soldier beams' front flanges the track-level walls have precast lagging between the beams' front flanges and the upper-bluff walls have precast concrete between the beams front flanges. The others, all originally contracted walls, include three beach, one track-level and three upper bluffs. wood lagging between the front soldier pile flange," explained William Lincke, project manager at CJA. The emergency wall at beach level is a 53-pile structure with 8-in. "The two at track level have tiebacks at the tops of the beams, allowing erosion to occur prior to placing precast or wood lagging between the beams' front flanges. Three of the walls - one beach and two at track level - are emergency walls. ft lagging.įurthermore, the project called for 10 soldier beam walls ranging in size from 6 to 14 ft. of soil the installation of nearly 200 steel beams, 250 yd. Elihu said it included the grading and exporting of 3,500 cu. Exceptions are made for emergency repairs to infrastructures. Why? They restrict public access and can cause coastal erosion. Unusual, because the California Coastal Commission typically opposes sea walls. Its expertise in deep foundation, earth retention and ground improvement made it a natural candidate for this unusual project.
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In business since 1974, CJA has projects throughout the western states, Alaska and Hawaii. "We tapped Condon-Johnson & Associates (CJA) as our main subcontractor because of its knowledge and expertise." A second subcontractor, Nu-Line Technologies in Encinitas, provided cured-in-place-pipe lining to repair existing drainpipes. "Our expertise includes structural concrete, road paving, electrical and landscaping, all of which are part of this project," said Shahram Elihu, project manager. Overseeing the project: Blue Pacific, a San Diego County contractor serving the area for nearly 20 years. The result: a $10.5 million emergency coastal rail corridor repair project that temporarily slowed, but didn't halt, train travel as work commenced in March on the installation of 13 sea walls, tie back systems, drain channels, grading and landscaping slated for completion in June 2022.įunds for the San Diego Association of Governments (SANDAG) and North County Transit District project were awarded by the California's Transportation Commission.