ARCHIVED REPORTS_2003_5 - Laserfiche WebLink

Home Browse Search

Unless otherwise describe in the manufacturer's installation instructions, each gabion shall be assembled by tying or fastening all untied edges. The binding wire shall be tightly looped around every other mesh opening along the seams in such a manner that single and double loops are alternated. The wire fastener shall be applied at approximately 4- to 6-inch intervals. A minimum of two fasteners per 1 foot, three fasteners per 1.5 feet, and six fasteners per 3-foot vertical or horizontal edge seam are required. A line of empty gabions, with joints staggered, shall be placed into position according to the Contract Drawings. Binding wire or wire fasteners shall be used to secure each unit to the adjoining one along the vertical reinforced edges and the top selvedges. An approved corner closure tool shall be used to adjoin adjacent gabions to insure a tight, neat seam and minimize gabion wire join deformation. The base of the empty gabions placed on top of a filled line gabions shall be tightly wired or fastened to the latter at front and back. The lid shall be secured with an approved closure tool to insure proper closure without excessive mesh deformation. B. Gabions 1. Tiers: Set tiers of assembled gabion units at locations and to lines and grades shown on the drawings. Each tier shall be set in place, laced, filled with rock filler, and approved by the Engineer before lids are laced down and successive tiers are placed. 2. Diaphragms: Where the length of the gabion exceeds its horizontal width, the gabion shall be equally divided by diaphragms, of the same mesh and gauge as the body of the gabions, into cells the length of which does not exceed the horizontal width. Diaphragms shall be tied on the vertical sides. Use lacing wire to join adjacent baskets together. 3. Interconnections: Interconnect gabions and check alignment carefully before placing rock filler. 4. Tie Wires: Vertical gabion cells that will remain exposed after completion of backfilling operations shall be furnished with internal tie wires perpendicular to the exposed faces, as shown on the drawings. Partially fill the gabion basket to the level where the tie wires shall be installed, install the tie wires equally spaced according to basket dimensions, and carefully continue filling to avoid dislodging, breaking, or bending the tie wires. 5. Basket Completion: When filling is complete, bend lids over to close the basket and secure lid firmly by lacing shut with connecting wires. The completed gabion structure shall be within +3 inches of the top elevations shown on the drawings. The surface alignment, including bulges, shall not vary more than 3 inches. FORWARD LANDFILL 02645 g MISCELLANEOUS CIVIL IMPROVEMENTS