Pile Calculation Using SPT
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Design of Micropile GEOPROFOUND ENGINEERING SDN BHD 08/23/2022 Pile Geotechnical Design using SPT Values Site: 1000 mm Skin Area pe 3.142 Base Area, Ab 0.785 Factor of Safety (FoS) = 2.000 1 11 22 69.1 69.1 1466.7 1151.9 1221.0 610.5 2 11 22 69.1 138.2 1466.7 1151.9 1290.1 645.1 3 2 4 12.6 150.8 266.7 209.4 360.2 180.1 4 2 4 12.6 163.4 266.7 209.4 372.8 186.4 5 2 4 12.6 175.9 266.7 209.4 385.4 192.7 6 13 26 81.7 257.6 1733.3 1361.4 1619.0 809.5 7 26 52 163.4 421.0 3466.7 2722.7 3143.7 1571.8 8 21 42 131.9 552.9 2800.0 2199.1 2752.0 1376.0 9 21 42 131.9 684.9 2800.0 2199.1 2884.0 1442.0 10 1 2 6.3 691.2 133.3 104.7 795.9 397.9 11 12 24 75.4 766.5 1600.0 1256.6 2023.2 1011.6 12 5 10 31.4 798.0 666.7 523.6 1321.6 660.8 13.5 6 12 56.5 854.5 800.0 628.3 1482.8 741.4 15 6 12 56.5 911.1 800.0 628.3 1539.4 769.7 16.5 1 2 9.4 920.5 133.3 104.7 1025.2 512.6 18 3 6 28.3 948.8 400.0 314.2 1262.9 631.5 19.5 1 2 9.4 958.2 133.3 104.7 1062.9 531.5 21 2 4 17.0 975.2 240.0 188.5 1163.6 581.8 23 2 4 22.6 997.8 240.0 188.5 1186.3 593.1 24 2 2464.8 7743.2 8741.0 10000.0 7854.0 16595.0 8297.5 Specified Working Load = 8000 kN Depth required = 13 m (Based on given BH/MKT Report & above FoS) Round Pile f = m 2 Depth Interval (m) Avg SPT Value, N Unit Skin Fric, fs = 2N (kN/m 2 ) Skin Fric, Fs (kN) Cumulative Skin Fric, Fs (kN) End Bear at depth, qb=min(400N/ 3, 10000) (kN/m 2 ) End Bear at depth, Qb (kN) Pile Ultimate Capacity, Qult = Fs+Qb (kN) Pile Allowable Capacity, Qall = Qult/FoS (kN) 0 1000 2000 3000 4000 5000 0 5 10 15 20 25 Pile Capacity (kN) Depth (m)
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Transcript of Pile Calculation Using SPT
GeotechnicalPile Geotechnical Design using SPT ValuesSite:Round Pile f =1000mmSkin Area per m, As=3.142Base Area, Ab =0.785m2Factor of Safety (FoS) =2.000Depth Interval (m)Avg MKT Value (M)Avg SPT Value, NUnit Skin Fric, fs = 2N (kN/m2)Skin Fric, Fs (kN)Cumulative Skin Fric, Fs (kN)End Bear at depth, qb=min(400N/3, 10000) (kN/m2)End Bear at depth, Qb (kN)Pile Ultimate Capacity, Qult = Fs+Qb (kN)Pile Allowable Capacity, Qall = Qult/FoS (kN)1112269.169.11466.71151.91221.0610.52112269.1138.21466.71151.91290.1645.132412.6150.8266.7209.4360.2180.142412.6163.4266.7209.4372.8186.452412.6175.9266.7209.4385.4192.76132681.7257.61733.31361.41619.0809.572652163.4421.03466.72722.73143.71571.882142131.9552.92800.02199.12752.01376.092142131.9684.92800.02199.12884.01442.010126.3691.2133.3104.7795.9397.911122475.4766.51600.01256.62023.21011.61251031.4798.0666.7523.61321.6660.813.561256.5854.5800.0628.31482.8741.41561256.5911.1800.0628.31539.4769.716.5129.4920.5133.3104.71025.2512.6183628.3948.8400.0314.21262.9631.519.5129.4958.2133.3104.71062.9531.5212417.0975.2240.0188.51163.6581.8232422.6997.8240.0188.51186.3593.12422464.87743.28741.010000.07854.016595.08297.519.500.00.00.00.00.00.02100.00.00.00.00.00.022.500.00.00.00.00.00.02400.00.00.00.00.00.025.500.00.00.00.00.00.02700.00.00.00.00.00.028.500.00.00.00.00.00.03000.00.00.00.00.00.031.500.00.00.00.00.00.03300.00.00.00.00.00.034.500.00.00.00.00.00.03600.00.00.00.00.00.037.500.00.00.00.00.00.03900.00.00.00.00.00.040.500.00.00.00.00.00.04200.00.00.00.00.00.043.500.00.00.00.00.00.04500.00.00.00.00.00.0Specified Working Load =8000kNDepth required =13m(Based on given BH/MKT Report & above FoS)
&LDesign of Micropile&RGEOPROFOUND ENGINEERING SDN BHD&R&D
Geotechnical
Depth (m)Pile Capacity (kN)
Structural APIMicropile Structural Capacity CalculationPile Diameter, f =1000mmGrade, fcu35cement grout (w/c ratio = 0.45)Use API Pipe,f88.9mm6.45mm thkfy =500N/mm2 (min)Area of Steel & ConcreteAs (provided) = 2prtAs =1670.7068271607mm2Ac = p*d2/4Ac =785500mm2Ultimate Axial Load,fu = 0.4fcu*Ac + 0.75fy*Asfu =11623515.0601853Nfu =11623.5150601853kNTaking Factor of Safety (FoS) =2fall = fu/FoSfall =5811.8kNBased on the structural capacity above, the micropile is able to take the given working loadof5811.8kNMicropile DetailsMicropile, Dia1000mmAPI Pipe insidef88.96.45mm thkClear spacing/Cover =455.6mmCement grout, G35NW/C Ratio 0.45 min
&LDesign of Micropile&R&"Arial,Bold"&12GEOPROFOUND ENGINEERING SDN BHD (707134-T)&R&D
Structural RebarMicropile Structural Capacity CalculationPile Diameter, f =1000mmGrade, fcu35cement grout (w/c ratio = 0.45)Use Rebar,f32mm25Nosfy =460N/mm2 (min)Area of Steel & ConcreteAs (provided) = Sprbars2As =20106.1929829747mm2Ac = p*d2/4Ac =785500mm2Ultimate Axial Load,fu = 0.4fcu*Ac + 0.75fy*Asfu =17933636.5791263Nfu =17933.6365791263kNTaking Factor of Safety (FoS) =2fall = fu/FoSfall =8966.8kNBased on the structural capacity above, the micropile is able to take the given working loadof8966.8kNMicropile DetailsMicropile, Dia1000mmR6 Spiral LinkRebar4Y12Cement grout, G35NW/C Ratio 0.45 min
&LDesign of Micropile&R&"Arial,Bold"&12GEOPROFOUND ENGINEERING SDN BHD (707134-T)&R&D
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