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Technical Resources

Doublewal is a gravity retaining wall system. This system consists of precast, interlocking, reinforced concrete modules which vary in size depending upon the application. Each module consists of a front face panel and a back face panel held ridged by concrete connecting beams. Doublewal modules are then stacked in place without the need for wood bracing or fasteners. The modules are then backfilled with earth material to readily form an economical gravity retaining wall.

Installation Process

Completed Wall Cast-In-Place Footing Layout Footings Painted String Line Pre Cast Footings Modules Setting Wall Modules Rubber Pad and Foam Rod Placement Filter Fabric Backfill Underdrain Modules Set and Ready For Parapets Parapets Pour Slab Pour Slab Complete Traffic Barrier with Cast-In-Place Moment Slab
Cast-In-Place Footing Layout
Footings
Painted String Line
Pre Cast Footings
Modules
Setting Wall Modules
Rubber Pad and Foam Rod Placement
Filter Fabric
Backfill
Underdrain
Modules Set and Ready For Parapets
Parapets
Pour Slab
Pour Slab Complete
Traffic Barrier with Cast-In-Place Moment Slab
Completed Wall

Why Use Doublewal

Doublewal applications will result in significant cost savings over alternative designs such as on site cast-in-place concrete, metal crib or reinforced earth retaining walls. Some of the reasons why are:

  1. Standardization of required components and mass production
  2. Doublewal's remarkable building-block concept with its interlocking design assures that each module will quickly self-align, as it is placed.
  3. Corrosion problems are eliminated as the assembly does not require forms, bolts, nuts, pins, fasteners, or special strips under layered embankments. Expansion joints normally are not required.
  4. Fast, safe, simple erection procedures utilizing standard shoulder rivet eye bolts, results in a 2-5 minute cycle time to unload the Doublewal module from the trailer and set it into final position.
  5. Minimum manpower is required for erection, i.e., a Foreman, a crane operator, one man on the trailer for unloading, and two men to guide the Doublewal into its final position
  6. Doublewal can be erected without concern about freezing temperatures, thus schedules are maintained even in winter months.
  7. Doublewal manufactures precast traffic barriers and copings that interlock with the Doublewal modules. View Installation Process
  8. Doubelwal can eliminate or minimize temporary sheeting because the contractor utilizes the production line concept of excavation, footing, wall erection and backfilling. This procedure greatly reduces the time at which the raw slope is exposed
  9. Although Doublewal acts as a rigid body in resisting lateral forces, it is vertically flexible so that differential settlements are tolerated, and in most cases will not affect the performance or appearance of the wall.
  10. The initial wall length may be easily extended and the integrity of the structure maintained. Utilities may be installed behind the wall without concern of effecting stability.

Literature

Click to download PDF

EZ BLock Specifications
Doublewal Cut Sheet
EZ-Block Product Cut Sheet
Doublewal Field Manual
EZ-Block Product Cut Sheet
Doublewal Typical Details
EZ-Block Product Cut Sheet
Doublewal Module Properties