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I <br /> 1 <br /> 2 U.S. Army Corps of Engineers (USAGE) <br /> 3 1. Draft Specification for Grid Aperture Stability by In-Plane Rotation <br /> 4 2. CW-02215 Determination of Percent Open Area. <br /> 5 <br /> 6 American Society of Civil Engineers (ASCE) <br /> I <br /> 7 1. Giroud, J.P., and Han, J. (2004). "Design method for geogrid-reinforced unpaved roads. <br /> 8 Part I — Development of design method." Journal of Geotechnical and Geoenvironmental <br /> 9 Engineering, 130 (8), 775-786. I 10 2. Giroud, J.P., and Han, J. (2004). "Design method for geogrid-reinforced unpaved roads. <br /> 11 Part II — Calibration and applications." Journal of Geotechnical and Geoenvironmental <br /> 12 Engineering, 130 (8), 787-797. <br /> 13 <br /> I <br /> 14 2-13.1(2) Definitions <br /> 15 Geogrid - A polymeric grid formed by a regular network of integrally connected, multi- ' <br /> 16 directional tensile elements of appropriate orientation, size and shape with triangular <br /> 17 apertures of appropriate size and shape to allow interlocking with surrounding soil, rock, or <br /> 18 earth to function primarily as reinforcement. <br /> 19 <br /> I <br /> 20 Radial Stiffness-determined from tensile stiffness measured in any in-plane axis from testing <br /> 21 in accordance with the scope of ISO 10319:1996. <br /> 22 <br /> I <br /> 23 Junction Strength - Breaking tensile strength of junctions when tested in accordance with <br /> 24 GRI-GG2 as modified byAASHTO Standard Specification for Highway Bridges, 1997 Interim, <br /> 25 using a single rib having the greater of 3 junctions or 8 inches and tested at a strain rate of I 26 10 percent per minute based on this gauge length. <br /> 27 <br /> 28 Aperture Stability Modulus (also known as Torsional Rigidity or Torsional Stiffness) - <br /> 29 Resistance to in-plane rotational movement measured by applying a 5 kg-cm (2.0 m-N) ' <br /> 30 moment to the central1by specimen of a 9-inch 9-inch s ecimen restrained at its perimeter. <br /> 31 <br /> 32 2-13.2 Materials <br /> I <br /> 33 Structural Soil Reinforcement Geogrid — The geogrid shall consist of a multi axial geogrid that is <br /> 34 integrally formed and deployed as a single layer having the following characteristics: <br /> 35 <br /> I <br /> Index Properties Longitudinal Diagonal Transverse General <br /> Rib pitch, mm (in) 40 (1.60) 40 (1.60) - I Mid-rib depth, mm (in) - 1.8 (0.07) 1.5 (0.06) <br /> Mid-rib width, mm (in) - 1.1 (0.04) 1.3 (0.05) <br /> Nodal thickness, mm (in) 3.1 (0.12) <br /> Rib shape rectangular <br /> Aperture shape triangular <br /> Rib Aspect Ratio (height: width) > 1.0 <br /> Structural Integrity <br /> Junction efficiency,(') °A) 93 I Aperture stability,(2) kg-cm/deg @ 3.6 <br /> 5.0kg-cm <br /> WEST MARINE VIEW DRIVE UTILITIES PAGE 85 OF 117 August 2018 <br /> WORK ORDER#3588 <br /> SPECIAL PROVISIONS <br />