603Slope and Channel Protection

603.01 Description

This Section describes the requirements for constructing various kinds of slope and channel protection.

603.02 Materials

603.02.01 Materials

Provide materials as specified: Coarse Aggregate (No. 57) ................................ ................................ ................................ ............................ 901.03 Fine Aggregate ................................ ................................ ................................ ................................ ........ 901.06.02 Riprap Stones................................ ................................ ................................ ................................ ................ 901.08 Concrete ................................ ................................ ................................ ................................ ....................... 903.03 Mortar ................................ ................................ ................................ ................................ ..................... 903.08.01 Curing Materials ................................ ................................ ................................ ................................ ........... 903.10 Reinforcement Steel ................................ ................................ ................................ ................................ ...... 905.01 Preformed Joint Filler ................................ ................................ ................................ ................................ ... 914.01 Joint Sealer ................................ ................................ ................................ ................................ ................... 914.02 Stabilization Geotextiles................................ ................................ ................................ ................................ 919.01 For rock backfill, use 8 inch (d50) riprap stone as specified in 901.08.

603.02.02 Equipment

Provide equipment as specified: Vibrator ................................ ................................ ................................ ................................ ...................... 1005.04 Concrete Batching Plant ................................ ................................ ................................ .............................. 1010.01 Concrete Trucks ................................ ................................ ................................ ................................ .......... 1010.02

603.03 Construction

603.03.01 Concrete Slope Gutter

Excavate as specified in 202.03.03. Shape and compact the underlying material to produce a firm, even surface. Each time before using, ensure that the forms are thoroughly cleaned and treated with a material that will prevent adherence of the concrete to the forms without discoloring the concrete. Construct 1/2 inch wide expansion joints, placed at intervals of approximately 20 feet, with preformed joint filler. Ensure that the expansion joint material extends for the full depth. Clean the top and ends of expansion joint material of all excess concrete, and trim the expansion joint material slightly below the surface of the concrete. Place concrete according to the limitations specified in 504.03.02.C. Place concrete across the formed area to minimize rehandling. Ensure that concrete is not discharged into windrows or piles. Continuously place concrete between transverse joints without the use of intermediate bulkheads. To prevent bowing or misalig nment of the transverse joints, place concrete simultaneously on both sides of transverse joints without disturbing the joints. Consolidate the concrete by hand spading or using internal mechanical vibrators. If a section is not completed from transverse joint to transverse joint, remove the incomplete section and replace. Terminate each day’s placement at a transverse joint. If concrete becomes segregated during placement, cease operations and correct handling operations. Protect concrete as specified in

504.03.02 I.

Strike off the concrete to the required cross section using a transverse template resting upon the side forms. Finish the concrete using floats and straightedges to obtain a sm ooth surface. When the surface of the concrete is free from water and just before the concrete attains its initial set, texture with a broom. Round edges using an edging tool with a 1/4 inch radius. Cure concrete using curing compound as specified in 504.03.02.F. Remove forms as specified in 504.03.02.G. After removing the side forms, backfill the spaces along the slope gutter with suitable material. Place this material in 5 inch lifts, and compact the layers until firm.

603.03.02 Concrete Slope Protection

Construct concrete slope protection as specified in 603.03.01. Place the welded wire mesh halfway between the top and bottom surfaces of the concrete. Construct edge beams and key beams monolithically with the slab. Score 1/2 inch deep joints on a 6 foot grid pattern. Round scored edges to a 1/2 inch radius with an edging tool. Place a 1/2 inch, preformed joint filler where the concrete abuts any portion of a structure.

603.03.03 Riprap Stone Slope Protection

Excavate as specified in 202.03.03. Shape and compact the underlying material to produce a firm, even surface. Place geotextile over the entire area where riprap is to be placed and extend it at least 12 inches on each side. Bury the geotextile that is extended outside of the riprap area a minimum of 6 inches into the soil. When joining sections of geotextile, overlap the geotextile by a minimum of 18 inches in the direction of flow. Place a 6 inch layer of coarse aggregate without damaging or dislodging the geotextile. Firmly bed the riprap stones into the coarse aggregate without damaging or displacing the geotextile. Use larger riprap stones in the lower courses. Fill spaces between the riprap stones with smaller stones of the same type and quality. Firmly ram the smaller stones into place. Provide an even, finished surface for the slope or channel protection.

Slope and Channel Protection in other states

• Ohio 601 · Slope and Channel Protection