The Three Rs in Gastonia: Raft footing, Rip Rap and Rubber Membranes

Hydromulch on corner section of site

The SW corner slope with ECO-Flex hydro mulch held up well to the past week of storms that dropped over 3” of rain in 7 days.  The mulch has seed, fertilizer, and tachafier (a type of polymer) that helps the organic mulch bond to the soil and helps reduce eroding of the slope.

Basket wall construction

The civil construction continues as the site contractor cuts out an area for the basket retaining wall. These walls once finished will measure over 40 feet; starting at the cut from the top of slope to the bottom where the wall footing will be.

Waterlines progress around site

The waterlines are being laid and crews are ready to tie it into the existing lines around the site. Before service can be sent to the building, the lines will have to be filled, flushed and treated with chlorine. In addition, the lines will be tested for bacteria as well.

Rip rap spread amongst the footing

We are using rip rap to condition and stabilize the ground under the raft style footing for the basket walls.  Rip rap is the rock or other material used to strengthen structures against water and natural erosion.  The basket walls will cross over each end of the double arches and hold the roadway to be constructed above.

Crews complete the raft footing after the rip rap install

The raft footing for the basket walls shown have 3 layers of geo grid and 2 ft of stone that is wrapped by another fabric like a “burrito”. This type of footing is used for the basket walls so that the wall is able to move and float on the marginal soils underneath without compromising the integrity of the wall itself.

Roofing crews installing membrane

The building work this week featured our crews began working on installing the membrane for the roof. In the photo above, the white area of the roof is the rubber membrane. This membrane is lightweight and allows for rain water to move more freely.