Pinnacle Retaining Wall and Erosion Control Systems

Soil Nail Walls


n		MSE Segmental Retaining Walls (SRW)
n		MSE Berm
n		MSE Panel Walls
n		Vegetated MSE Slopes
n		Stone Faced MSE Walls
n		MSE Pressure Relief Walls
n		Cast-In-Place (CIP) Concrete Walls
n		Gravity Retaining Walls
n		Soil Nail Walls
n		Piling Walls
n		Gabion Structures
n		Above and Underground Stormwater Detention Structures
n		Composite Wall Systems
n		Retaining Wall Repair

Soil Nailing is an insitu reinforcing of the soil while it is excavated from the top down. Any array of soil nails which are passive inclusions are installed in a grid that functions to create a stable mass of soil. This mass of reinforced soil functions to retain the less stable material behind it. In the right soil conditions, soil nailing is a rapid and economical means of constructing excavations support systems and retaining walls. In many applications soil nailing can be the least disruptive way to construct a retaining wall. Soil Nailing requires an unusual amount of hand work, craftsmanship and geotechnical knowledge to construct. The typical construction sequence begins with the excavation of a shallow cut. Then, shotcrete is applied to the face of the cut and soil nails are drilled and grouted. This sequence is then repeated until subgrade is reached. Unlike soldier beam walls, soil nail walls eliminates the Need for Drilling and Installing Caissons. Soil nailed retaining walls can be constructed with a variety of concrete facing options.

Pinnacle Design/Build - Soil Nail Wall Project Profiles


		Blue Ridge Parkway Landslide Repair, Spruce Pine, NC PROJECT FACTS: Wall Area = 5,000 SF; Max Ht = 22.5 FT CHALLENGE: Repair to the parkway at the several landslide locations. SOLUTION: Pinnacle Design/Build was part of a design team that utilized soil nailing, tiebacks and MSE retaining walls to stabilize the slide and support the reestablished roadway. VALUE: The solution of soil nailing and MSE retaining walls provided a high performance and reliable support system.

		The Retreate at High Pointe, Savannah, TN PROJECT FACTS: Wall Area = 25,000 SF; Max Ht = 36 FT CHALLENGE: This high end residential development was to be situated on the steep bluffs above Pickwick Dam in Savannah, Tennessee. However, the site was too steep and unstable to build conventional access roads and building lots. SOLUTION: Pinnacle Design/Build worked with the developer to design the most efficient combination of walls and usable building lots possible. Then we constructed a gently curving, combination MSE/soil nail wall to create the space required without detracting from the natural beauty of the surroundings. VALUE: The Pinnacle Design/Build solution was implemented in less than three months and saved the developer significant money in terms of wall cost and lot production. Moreover, the appearance of the finished product fits well with the surroundings.

		Piedmont West, Atlanta, GA PROJECT FACTS: Wall Area = 9,000 SF; Max Ht = 30 FT CHALLENGE: A below grade parking structure required thick, expensive reinforced concrete retaining walls to support lateral earth pressures and the structure to be constructed above it. SOLUTION: Pinnacle Design/Build value engineered and constructed a composite soil nail and MSE retaining wall system to withstand the anticipated lateral loads. A segmental block facing was constructed in front of the composite mass to form the permanent interior wall facing for the parking garage. This eliminated the need to build an additional facing wall. VALUE: The developer was able to save about 40% of the cost of traditional foundation walls and cut the timeline for completion by about 30%.

		TN DOT I-40/SR171, Mount Juliet, TN PROJECT FACTS: Wall Area = 2,000 SF; Max Ht = 19 FT CHALLENGE: Commercial development near this busy interchange required construction of a new deceleration lane. Insufficient space in the area where SR 171 passes over I-40 necessitated construction of a retaining wall in the confined space under the bridge. However, the wall could not disturb with the existing bridge abutment or roadway. SOLUTION: Pinnacle Design/Build engineered and constructed a soil nail retaining wall with a permanent segmental retaining wall facing to solve the problem. VALUE: This system limited the amount of excavation required and disturbance to the surrounding infrastructure. The segmental block facing allowed the wall to blend nicely with the surroundings.


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Pinnacle Design Build Group, Inc. provides all engineering and design services through subcontract agreement with Vertex Design Group, LLC.