Transmission And Substation Foundations - Technical Design Manual (TD06088E)

HIGH COMPRESSION STRENGTH WITH DRIVECAST™ PILES IN FIRM SOILS The following tables provide the nominal, LRFD design, and ASD allowable compression strengths of Drivecast piles with various diameter grout shafts in firm soils. The strengths listed are based on an unsupported length of 5 feet (3 meters) with either a fixed or pinned end condition at the pile head. The grout column diameters listed reflect the results in various soil conditions. In clay, the grout column is generally close to the diameter of the small plate on the displacement assembly. In sand, the grout column ranges between the small and large diameter plates on the displacement assembly. In loose sand fill, the grout column can exceed the diameter of the large plate on the displacement assembly. Each table includes the compression strengths of shafts without external grout for comparison.

Per the International Building Code (IBC) 2015 Section 1810.2.1, the depth to fixity of piles driven into firm ground can be considered fixed and laterally supported at 5 feet below ground surface.

Nominal, LRFD Design, and ASD Allowable Compression Strengths of Drivecast Piles, Type SS175 Central Shafts in Firm Soil 1,2,3

Nominal, LRFD Design, and ASD Allowable Compression Strengths kip (kN) Firm Soil Pinned Fixed

Grout Column Diameter

Nominal

Design

Allowable

Nominal

Design

Allowable

No Grout

103.02 (461.7) 386.26 (1731.3) 448.60 (2010.7) 516.53 (2315.1) 590.27 (2645.7) 670.00 (3003.0)

92.82 (416.0) 289.6 (1298.4) 336.4 (1508.0) 387.40 (1736.4) 442.7 (1984.2) 502.5 (2252.3)

61.69 (276.5) 193.13 (865.6) 224.30 (1005.3) 258.26 (1157.5) 295.13 (1322.8) 335.00 (1501.5)

164.26 (736.2) 424.24 (1901.5) 484.31 (2170.7) 550.36 (2466.8) 622.55 (2790.4) 701.01 (3142.0)

147.83 (662.6) 318.18 (1426.1) 363.24 (1628.1) 412.77 (1850.1) 466.91 (2092.7) 525.76 (2356.5)

98.36 (440.8) 212.12 (950.7) 242.16 (1085.4) 275.18 (1233.4) 311.27 (1395.1) 350.50 (1571.0)

8” OD 9” OD 10” OD 11” OD 12” OD

Nominal, LRFD Design, and ASD Allowable Compression Strengths of Drivecast Piles, Type SS200 Central Shafts in Firm Soil 1,2,3

Nominal, LRFD Design, and ASD Allowable Compression Strengths kip (kN) Firm Soil Pinned Fixed

Grout Column Diameter

Nominal

Design

Allowable

Nominal

Design

Allowable

No Grout

167.34 (750.0) 453.11 (2030.9)

150.60 (675.0) 339.83 (1523.1) 387.42 (1736.5) 439.08 (1968.0) 495.02 (2218.7) 555.36 (2489.2) 620.24 (2780.0) 689.74 (3091.5) 763.95 (3424.1) 842.91 (3778.1)

100.20 (449.1) 226.55 (1015.4) 258.28 (1157.6) 292.72 (1312.0) 330.01 (1479.1) 370.24 (1659.4) 413.49 (1853.3) 459.83 (2061.0) 509.30 (2282.7) 561.94 (2518.7)

239.01 (1071.2) 495.45 (2220.7) 556.10 (2492.5) 622.66 (2790.8) 695.29 (3116.4) 774.13 (3469.8) 859.27 (3851.4) 950.81 (4261.7) 1048.78 (4700.8) 1153.25 (5169.1)

215.11 (964.1) 371.59 (1665.5) 417.07 (1869.3) 466.99 (2093.1) 521.47 (2337.3) 580.60 (2602.3) 644.46 (2888.6) 713.10 (3196.2) 786.59 (3525.6) 864.94 (3876.8)

143.12 (641.4) 247.72 (1110.3) 278.05 (1246.2) 311.33 (1395.4) 347.64 (1558.1) 387.06 (1734.8) 429.64 (1925.7) 475.40 (2130.8) 524.39 (2350.4) 576.62 (2584.5)

8” OD

DRAWINGS AND RATINGS 9” OD 516.55 (2315.2)

10” OD 11” OD 12” OD 13” OD 14” OD 15” OD 16” OD

585.45 (2624.1) 660.02 (2958.3) 740.48 (3318.9) 826.98 (3706.7) 919.66 (4122.1) 1018.6 (4565.5) 1123.8 (5037.4)

For SI: 1 kip = 4.448 kN. 1 Refer to Section 4.1.3 of ESR-2794 for descriptions of fixed condition, pinned condition, soft & firm soil. 2 Strength ratings are based on a design corrosion level of 50-years and presume the supported structure is braced in accordance with IBC Section 1808.2.5. 3 Column length to “fixity” of shaft in soft soil = 10 feet (3 meters), and 5 feet (1.5 meters).

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