614.01 Description
This work is constructing concrete and metal bin-type retaining walls.
614.02 Materials
Furnish materials in accordance with the following section and subsection requirements: Backfill for Metal Bin-Type Retaining Walls ............. 701.09 Hydraulic Cement Concrete .................................... 551 Metal Bin-Type Retaining Walls .............................. 711.17 Reinforcing Steel ..................................................... 711.01
614.03 Construction Requirements
614.03.1 Foundations
Excavate and prepare foundations for concrete retaining walls in accordance with Subsection 209.03. Construct metal bin-type retaining wall foundations to the established lines and grades and compact in accordance with Subsection 203.03.3. The Project Manager will inspect and approve all foundations before subsequent work.
614.03.2 Concrete Retaining Walls
Construct concrete retaining walls as specified in the contract. Perform concrete work in accordance with Section 552. Remove all deleterious material from the footings before placing concrete. Prepare the footing surface in accordance with Subsection 552.03.6. Make vertical construction joints in accordance with Subsection 552.03.6.
614.03.3 Bin-type Retaining Walls
Assemble the wall parts following the wall manufacturer’s recommendations. If approved, the wall height and depth may be varied but cannot exceed the maximum dimension shown. Two or more retaining wall designs may be used in the same wall, using standard split columns to make the step back connection.
614.03.4 Backfill
A.Concrete Structures. Furnish the backfill material specified in the contract. Place backfill as specified in Subsection 203.03.2(B).
B.Metal Bin-type Retaining Walls. Follow the manufacturer’s recommendations for placing and compacting backfill material. If no recommendations are made, bring the backfill up equally inside and outside the bins as follows: • For backfill material outside the bins, use roadway excavation and place it as specified in Subsection 203.03.2(B) . • Furnish backfill material for inside the bins in accordance with Subsection 701.09. • Place the backfill in 8-inch (200 mm) maximum compacted lifts, completely filling in all corrugations. Compact backfill as specified in Subsection 203.03.3. Hollow sounding corrugations in the bin wall face detected by the Inspector is cause to remove, replace, and re-compact the backfill at Contractor expense. 614 – RETAINING WALLS 2020 EDITION V5.1 614-2
614.04 Method of Measurement
614.04.1 Concrete
Concrete is measured by the cubic yard (m3) in accordance with Subsection 552.04.
614.04.2 Reinforcing Steel
Reinforcing steel is measured by the pound (kg) in accordance with Subsection 555.04.
614.04.3 Metal Retaining Walls
Metal bin-type retaining walls are measured by the nominal square foot (m2) of facial area of wall.
614.05 Basis of Payment
Payment for the completed and accepted quantities is made as follows: Pay Item Pay Unit Concrete Cubic Yard (m3) Metal Retaining Wall Square Foot (m2) Reinforcing Steel Pound (kg)
Retaining Walls in other states
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Source: Standard Specifications for Road and Bridge Construction, 2020 (v5.1) Edition. Pages 451–452 of 611. View official source ↗