Download - Keystone

BPART SIXAppendix BNCMA 2ND EDITION - COULOMB METHODOLOGY LEVEL SURCHARGE - 250 PSF13) Connection StrengthThe last major item to check is the geogrid connection strength. KeyWall incorporates thelaboratory connection test data for all Keystone unit types connected to different geogrid types.The following chart is applicable for Standard units and Stratagrid SG200 geogrid in this example:3000Connection Capacity2500Connection Force (plf)20001500100050000 500 1000 1500 2000 2500 3000 3500 4000Normal Force (plf)The equations for these connection curves are:Peak Connection = 834 plf + N Tan 35.8˚ < 1567 plf Max / 1.5 Factor of Safety¾" Serviceability = 795 plf + N Tan 4.1˚ < 1062 plf MaxHeight Grid Depth N Tpeak TServ Load4) 8.00' SG200 2.00' 420 758 825 3533) 5.33' SG200 4.67' 981 1028 865 5072) 2.67' SG200 7.33' 1539 1045 905 6081) 0.67' SG200 9.33' 1959 1045 935 528OK - Calculated loads are less than the maximum allowable for Peak and Serviceabilityconnection criteria.B.8