LINE B-2-3 AND B-2-4 - Laserfiche WebLink

29-05 29-06 In no case shall the extreme minus tolerance extend continuously over an area exceeding 200 square feet. The grout shall be placed to a depth of twelve (12) inches from the rock surface in one course only. The grout for the cutoff walls shall be placed to the full depth of the walls in twelve (12) inch layers. Prior to groutng, the rock shall be flushed with water to wash down the fines. The rock shall be kept wet just ahead of the actual placing of grout. T~e grout shall be brought to the place of final deposit by methods approved by the Engineer and discharged directly on the rocks, using a splash plate of metal or wood to prevent displacement of rock directly under the discharge. The flow of grout shall be directed with brooms, spades or barrels to prevent it from fl owing excessively along the same path, and to assure that all voids are filled. Sufficient barring shall be done to loosen tight pockets of rocks and otherwise aid the penetration of grout. All brooming on the slopes shall be uphill, and after the grout has stiffened, the entire surface shall be rebroomed to eliminate runs and to fill voids caused by sloughing of the grout. After completion of any strip or panel, ~no workman or other load shall be permitted on he grouted surface for a period of twenty-four (24) hours. The grouted surface shall be protected from injurious action by the sun and shall be protected from rain, flowing water, and mechanical injury, and shall be cured as specified by the Engineer. Weep Holes: Weep holes shall be provided by placing fiber tubes or pipe (4-inch minimum diameter) through the grouted rock at a five foot longitudinal spacing. The tubes used to form weep holes shall extend a minimum distance of two (2) inches into the filter blanket. Cardboard or fiber tubing shall be removed after concrete grout has set and before completion of work. Measurement and Payment. The quantity to be paid for will be the number of cubic yards of rock placed (not including the filter blanket) as determined from the dimensions shown on the plans or the dimensions directed by the Engineer. Payment will be at the contract unit price per cubic yard for grouted rock slope protection and shall include payment for furnishing and installing all materials, trenching for cut-off walls, installing weep- holes, placing filter blanket and concrete grout and all. other incidentals. No separate payment will be made for earthwork, filter materials or concrete grout. CDS.1.18 29-3