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GNE-00800 Modulus Test Results_11-17-11Project:Atwood Drive Office Building Design Stress:27,820 psf Location Northampton, Massacusetts Nominal Pier Dia.:22.7 inches Project Number:GNE-00800 Pier Length:20.8 ft. Test Pier Number:TP-1 (Grouted Aggregate Pier) Date of Installation: Date of Test: Location:Between piers 249 and 264, Grid D.2-4.8 Nearest Boring:B-7 GFC Representative:Craig Harris (HDI)Owner Rep:None Present General Requirements:ABI 13/16 MRZV-20VV Hammer, 10.5 in. dia. mandrel, 65.7 cf 3/4- in. uniform graded stone, Pull 4'/Push 3' in silt/clay Pull 3'/ Push 2' in fill, 39 gal. 1:1 Cement Grout Leader Pressure: Advancing - 180 bars, at Base - 180 bars, Top of Pier - 180 bars BST Proof Test @ 180 bars: 1/2" in 3 minutes @ 21' Ram Load, (tons) Applied Stress, (psf) Percent Design Stress Total Deflection, (in) Tell-Tale Deflection, (in) Impact Pier Modulus, (pci) 1.52 1,391 5% 0.000 0.000 0 5.06 4,638 17% -0.010 -0.003 3221 10.11 9,272 33% -0.026 -0.004 2477 15.17 13,910 50% -0.038 -0.005 2542 20.23 18,548 67% -0.051 -0.006 2526 25.29 23,182 83% -0.065 -0.010 2477 30.35 27,820 100% -0.074 -0.014 2611 35.40 32,449 117% -0.095 -0.025 2372 40.46 37,092 133% -0.103 -0.029 2501 45.52 41,730 150% -0.115 -0.034 2520 30.35 27,820 100% -0.111 -0.032 1740 20.03 18,361 66% -0.103 -0.027 1238 10.01 9,181 33% -0.095 -0.021 671 0.00 0 0% -0.076 -0.007 0 GROUTED IMPACT PIER (GAP) MODULUS LOAD TEST Diagram November 8, 2011 November 17, 2011 Impact Pier Modulus Load Test Deflection vs. Top-of-Pier Stress -0.500 -0.400 -0.300 -0.200 -0.100 0.000 0 5,000 10,000 15,000 20,000 25,000 30,000 35,000 40,000 45,000 Top-of Impact Pier Stress, (psf)Deflection, (in)Telltale Top of Impact Pier 2.5' 23.3' Telltale Depth Telltale Med. dense silt and soft Clay, little fine sand 8' GS El. 122 d = 22.7" Loose to med. dense fine to medium sand, trace silt and gravel (Fill) 12' TM 24" Diameter Concrete Fine to coarse sand, little gravel, trace silt Grouted Shaft Ungrouted Shaft 6.8' 14' Design Stress 27.82 ksf