THE JOB
This NC tub crossing repair project is located in Charlotte, North Carolina. The 8′ long panels of tub-style grade crossing settled. As a result, MOW placed a speed restriction on the crossing. This affected passenger schedules. The settlement affected three panels. The belly in the slabs was approximately 2 inches. The crossing deflected slightly with heavy truck traffic. The crossing deflected significantly with rail traffic.
THE CHALLENGE
The repair had to be completed in just a few hours, to avoid disruption to rail traffic. The repair had to allow for immediate resumption of rail traffic, and tolerate tamping of the adjacent truck during the repair. Additionally, the tub crossing repair had to be done in a manner that did not disturb the adjacent asphalt pavement.
THE SOLUTION
High-density geotechnical polyurethane grouting to stabilize and lift the affected modular grade crossing panels. Geotechnical polyurethane grouting is far superior to mudjacking, in that the process is faster, and can more easily ensure a complete filling of voids under the crossing panels. Lifting precision of fewer than 0.1 inches is standard.
A CJGeo modular grade crossing repair crew filled the voids and corrected settlement in a few hours. During the tub crossing repair, the rail system used a tamper on the approaches. This helps ensure the longevity of the grouting repair. The structural polymer grouting process used here is sometimes referred to as slab jacking.
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Facing a similar challenge to this NC tub crossing repair project? Give us a shout or shoot us a text. Click the state marker for the location of your project for contact info for the appropriate rep.
