Sandbridge Road is the only route in and out of the coastal community. In order to provide continued access, a temporary bridge must be constructed before the bridge replacement can begin. The site is a swampy area with a high water table which means a solid subgrade is critical.
First, a Type III Impervious Turbidity Curtain was installed to control sediment that could enter the waterway. The custom manufactured curtain totals 150 linear feet. Next, the contractor cleared the swamp and began to fill with stone; the first layer of subgrade support. Layers of nonwoven fabric, grid and 6”-8” stone lifts follow.
The nonwoven fabric acts as a drainage layer and a separator. It prevents stone from falling through the geogrid apertures and contaminating the soft soil. The grid spreads the load across the entire plane and stabilizes the subgrade. As the layers of nonwoven, grid, and stone are compacted, the soft soils are strengthened and hydraulic pumping is prevented.
Fill sand is dumped after several layers of fabric and stone. Now the temporary bridge can withstand heavy loads and a crane sits securely where a swamp used to be.
>Rte. 7 Corridor project shows promise of real improvementforcommuters
>NC Developer has big plans for CSX in Richmond's Rocketts Landing
>Grass restoration in coastal Virginia community most successful in the world
July 4th Hours
We will close at noon on Wednesday July 3 and will remain closed through Friday July 5.
Please be aware that orders placed that week may result in longer than normal lead times.
We will reopen on Monday July 8 at 7:30 am.
Contact Us Today
1071 Merchants Lane
Oilville, VA 23129
Virginia Beach Office
2432 Bowland Parkway
Virginia Beach, VA 23454
Learn something new? Share itwith your co-workers!