Updating Bearing Capacity – SPT Graphs - Maryland State Highway ...

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Figure 4.2 and Table 4.2 show the values of x 1 and x 2 as a function of N 60 . Appendix A-2 showsthe determination of x 1 and x 2 as a function of ϕ.TABLE 4.1 x 1 and x 2 Factors as a Function of N 60 for a Wall FootingN 60 x 1 x 2 N 60 x 1 x 22 14.11 7.91 28 35.08 25.674 15.06 8.62 30 37.75 28.156 16.09 9.41 32 40.85 31.128 17.22 10.28 34 44.12 34.2810 18.40 11.20 36 47.73 37.8312 19.74 12.28 38 51.74 41.8614 21.14 13.42 40 55.96 46.1216 22.67 14.69 42 60.90 51.2718 24.34 16.10 44 66.14 56.7920 26.09 17.59 46 71.96 63.0322 28.10 19.36 48 78.49 70.1824 30.21 21.23 50 85.38 77.7726 32.53 23.32TABLE 4.2 x 1 and x 2 Factors as a Function of N 60 for a Square FootingN 60 x 1 x 2 N 60 x 1 x 22 21.49 4.75 28 60.02 15.404 23.13 5.17 30 65.19 16.896 24.94 5.65 32 71.20 18.678 26.91 6.17 34 77.61 20.5710 29.02 6.72 36 84.77 22.7012 31.41 7.37 38 92.77 25.1214 33.95 8.05 40 101.23 27.6816 36.73 8.81 42 111.26 30.7718 39.79 9.66 44 122.03 34.0720 43.02 10.56 46 134.06 37.8222 46.76 11.61 48 147.72 42.1124 50.72 12.74 50 162.22 46.6726 55.14 13.994-3
x1 and x2 factors1801601401201008060Square Footing on Granular Soilsq ult = γ [D x 1 + B x 2 ] psfq q FSall=ultγ in pcf, D in ft, B in ftx 1402000 5 10 15 20 25 30 35 40 45 50Standard Penetration Resistance, blows/ftx 2Note: Settlement was not considered in the graph.Fig. 4.2x 1 and x 2 factors as a function of N-value for a square footing4-4
Page 1: UPDATING BEARING CAPACITY - SPT GRA
Page 4 and 5: SUMMARYThe graphs used by the Maryl
Page 6: 90x1 and x2 factors x1 and x2 facto
Page 9 and 10: LIST OF TABLESTablePage2.1 Angle of
Page 11 and 12: CHAPTER IINTRODUCTION1.1 General Ov
Page 13 and 14: Fig. 1.2Maryland SHA graphs for cla
Page 15 and 16: CHAPTER IISOIL PROPERTIES FROM SPT
Page 17 and 18: Fig. 2.1Correlation between frictio
Page 19 and 20: The Japanese “Road Bridge Specifi
Page 21 and 22: Fig. 2.3Relationship between SPT N-
Page 23 and 24: CHAPTER IIIAVAILABLE BEARING CAPACI
Page 25 and 26: q ult(AASHTO 4.4.7.1-1)= cNc+ 0.5γ
Page 27 and 28: TABLE 3.3 AASHTO Expressions for Fo
Page 29: 90807060Wall Footing on Granular So
Page 33 and 34: q ult= γ 1x 1D + γ 2x 2Bwhere γ
Page 35 and 36: Presumptive Ultimate Bearing Capaci
Page 37 and 38: = 466N psfFigure 4.5 and Table 4.4
Page 39 and 40: CHAPTER VAPPLICATIONS OF CURRENT AN
Page 41 and 42: Fig. 5.1 Comparison between the cur
Page 43 and 44: Fig. 5.2 Comparison between the cur
Page 45 and 46: REFERENCESMcGregor, J.A. and Duncan
Page 47 and 48: A.1. x 1 and x 2 factors as a funct
Page 49: APPENDIX BShear Strength vs. SPT-va

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