Standard specification for road works 2015/2016
Standard specification for road works; Reports; PublicationNT
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miscellaneous provisions ■ provision for traffic ■ clearing grubbing and rehabilitation ■ earthworks ■ conformance testing ■ pavements and shoulders ■ stabilisation ■ spray sealing ■ dense graded asphalt ■ slurry surfacing ■ miscellaneous concrete works ■ drainage works ■ protection works ■ road furniture and traffic control devices ■ pavement marking ■ landscape ■ ducting and conduits ■ traffic control signals ■ traffic counting stations ■ street lighting ■ directional (thrust) boring ■ measurement and payment ■ referenced documents ■ nt climate zones table ■ This document specifies the general standards of materials and workmanship required by the Department of Infrastructure for construction of civil road network assets
Roads -- Northern Territory -- Works -- Periodicals.
Department of Infrastructure
PROTECTION WORKS STANDARD SPECIFICATION ROADWORKS DoI REFERENCE TEXT December 2015 Page 94 Table 13.6 Wire Properties Reno Mattresses Wire Type Minimum Diameter (mm) Body wire 2.0 Binding and lacing wire 2.2 Selvedge wire 2.4 Selvedge wire to be woven integrally along all edges of the mesh, in accordance with the manufacturer's instructions. Cut to shape where necessary. MATTRESS PANELS Bottom panel: Includes both sides and both end panels. Top panel: Shall have the same dimension as the bottom, without the sides and ends, and be supplied separately. Diaphragms: Extend over the full width of the mattress from top to bottom at maximum intervals of 1 m. 13.10.3 Construction Assemble and erect in accordance with the manufacturer's instructions. Align diaphragms perpendicular to the direction of flow unless otherwise specified. Pretension the wire framework against a firm anchor or adjacent units. Retain the shape of the wire framework with spreaders. Fill with hard durable stone complying with 13.4 Rock Properties and placed in stages to achieve the tightest packing of stone. Maximum stone dimension: 120 mm when mattress depth 170 mm. 150 mm when mattress depth 230 mm. 200 mm when mattress depth 300 mm or greater. Minimum least stone dimension: 80 mm. Overfill the framework by 20 mm to 50 mm to allow for subsequent movement of the stone. Perform lacing operations using specified lacing wire. Wire to pass round the edges being joined using alternative single and double loops through each mesh in turn. Tightness of the mesh and wiring is essential. Last panel on downstream side, or at base of slope, shall be a whole unit (i.e. not cut). Ensure a tightly packed, neat and uniform construction. 13.11 REVETMENT MATTRESSES 13.11.1 General A nylon fabric material filled with mortar with filter points for the relief of hydrostatic uplift pressure. Conform to the manufacturer's instructions. 13.11.2 Materials Mortar mix proportions: Table 13.7 Mortar Mix Proportions Revetment Mattresses Cement Type GP or GB Fine Sand Coarse Sand Water 1 (500kg) 1.2 (600kg) 2.2 (1,100kg) 450 l/m 3 Adjust fine sand/coarse sand proportions if required to provide workable mix. 13.11.3 Construction Toe-in to provide cut-off walls minimum 300 mm deep and width not less than maximum thickness of mattress. Lay, cut and stitch mattress on prepared surface. Make allowance for take up of fabric resulting from filling mattress with mortar. All stitching and seams to be neat in appearance and strength to withstand filling pressure. Ensure mattress is anchored prior to mortar pumping to prevent creep during placement of mortar. Provide openings in fabric at a maximum of one every 50 sq.m for placement of mortar. Opening to match size of pumping hose. Make good openings on completion of mortar pumping. All areas of mattress to be hard filled with mortar with smooth surface. Do not permit any loading on the mattress until one hour after mortar pumping has been completed. Remove spilt mortar from surface of mattress by hand only. Do not use water to wash spilt mortar. Make good any defective areas.