Soil Nailing · Newbury, NH
Soil Nail Wall, 16 Edgemont Landing
The Phase II garage at 16 Edgemont Landing needed a permanent soil nail wall built to a PE-stamped design, on a schedule tied to a facing subcontractor's shotcrete window.
The problem
The Phase II garage at 16 Edgemont Landing needed a permanent soil nail wall built to a PE-stamped design, on a schedule tied to a facing subcontractor's shotcrete window.
The engineered approach
Sixty fully grouted soil nails on 32 mm hollow threaded bar, installed 20 ft into the ground with a 2 ft stickout, each finished with a 10 in × 5/8 in bearing plate, hex nut and washer. ESC's scope is installation only — the geotechnical investigation, wall design, layout and PE stamp are furnished by others.
Outcomes for the GC
- Subcontract executed 9 June 2026 at $141,000
- Installation-only scope, sequenced around the facing subcontractor
- Mobilised on the GC's stated schedule
How we built it
A schematic section of the soil nailing system for this Newbury, NH job. Scroll to build it in construction order, or select a callout to read the detail.
Callouts
Select a numbered part below to read what it is and what it does.
- The general contractor takes the cut down in lifts. Each lift goes only as deep as the ground will stand unsupported long enough for ESC to drill, grout and finish that row of nails.
- A self-drilling hollow bar is its own drill string: it is advanced into the retained ground and left in place, so a hole that would ravel in loose soil never has to stand open.
- The bit stays in the ground at the far end of every bar. Sixty nails are installed across this wall, each one 20 ft into the retained ground.
- Grout is pumped down the hollow core and out through the bit, so the bar is drilled and grouted along its whole length in a single pass. Soil nails are passive: they pick up load as the ground deforms, and are never stressed like a tieback.
- Each head is finished with a 10 in × 5/8 in bearing plate, washer and hex nut on the 2 ft of bar left projecting from the face — the detail that transfers facing load back into the nail.
- Everything drawn dashed is furnished by others — the facing subcontractor's shotcrete and the garage structure behind it, plus the geotechnical investigation, the wall design, the PE stamp and the layout. ESC's scope on this contract is installation of the nails only.
Ready to scope your foundation?
Tell us about the project and we'll put together a detailed quote within 3 days. We generally work with general contractors.
Or email plans to bids@earthsupportcorp.com