2516.01
DESCRIPTION.
A.
This section was developed in conjunction with Section 9072 of the SUDAS Standard Specifications, with modifications to suit the needs of the Department.
B.
Construct combined concrete sidewalk and retaining wall.
2516.02 A.
B.
MATERIALS. Combined Concrete Sidewalk and Retaining Wall. 1.
Portland Cement Concrete. Comply with Article 2511.02, A.
2.
Reinforcing Steel. Comply with Section 4151.
3.
Expansion Joint. Comply with Article 4136.02. Use resilient filler when type is not specified.
Subdrain. Use minimum 4 inch diameter pipe. 1.
Polyvinyl Chloride Pipe and Fittings (Solid Wall PVC):
minimum pipe stiffness.
12454.
ASTM D 3212 and ASTM F 477.
rows of 1/4 to 3/8 inch diameter holes along the bottom of pipe.
2.
Corrugated Polyvinyl Chloride Pipe and Fittings (Corrugated PVC):
Combined Concrete Sidewalk and Retaining Wall
c. d. e. 3.
C.
Use PVC plastic complying with ASTM D 1784, Cell Classification 12454. Integral bell and spigot type rubber gasket joint complying with ASTM D 3212 and ASTM F 477. Slot subdrain pipe according to ASTM F 949.
Corrugated Polyethylene Tubing and Fittings (Corrugated PE):
for soil tight service.
Porous Backfill Material for Subdrain. 1.
Crushed Stone or Processed Gravel. Comply with Section 4131.
2.
Pea Gravel. Comply with Gradation No. 20 or 21 of Section 4109 and the quality requirements of Section 4131.
D.
Suitable Backfill Material. Comply with Article 2102.02, D, 2.
E.
Rodent-Proof Hardware Cloth. Comply with Materials I.M. 443.01.
2516.03 A.
B.
2516.03
CONSTRUCTION. Excavation and Embankment. 1.
At locations where the wall will be constructed against embankment, compact to a minimum of 90% of maximum Standard Proctor Density prior to beginning wall construction.
2.
Excavate to the line and grade specified in the contract documents. Minimize over-excavation. Install sheeting, shoring, or other retention systems as required to ensure the stability of the excavation.
Installation. 1.
General.
wall is not formed and sloughing occurs, remove loose material, and replace with concrete at no additional cost to the Contracting Authority.
holes with an approved rustproof device backed with rodent-proof hardware cloth.
subdrain within porous backfill trench. Ensure positive drainage on subdrain.
2517.02
Railroad Approach Sections
2.
C.
Joints. 1. 2.
D.
Backfill Material Placement.
compaction in maximum 8 inch lifts, spread, and compact.
of the wall face.
FormED joints in wall at no more than 60 foot spacing. Affix expansion material to retaining wall. Form C joints in the wall at no more than 20 foot spacing.
3.
Form E joints in sidewalk to coincide withED joints in wall. Form C joints in sidewalk at spacing equal to sidewalk width.
4.
Form longitudinal joint in sidewalk when sidewalk width is greater than 8 feet.
Rustication. Decorative form liners or inserts may be used when forming the face of the wall with the approval of the Engineer. Form rustications as specified in the contract documents.
2516.04METHOD OF MEASUREMENT
Measurement for Combined Concrete Sidewalk and Retaining Wall will be cubic yards shown in the contract documents.
2516.05BASIS OF PAYMENT
Payment for Combined Concrete Sidewalk and Retaining Wall will be the contract unit price per cubic yard. Payment is full compensation for: • Excavation and foundation preparation, • Furnishing and placing concrete and reinforcing steel, • Joint material, • Subdrain, • Porous backfill material, • Suitable backfill material, • Finishing disturbed areas, and • Shoring as necessary.