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400mm RC Pile Set Calculation

This document contains a pile set calculation for a 400mm x 400mm reinforced concrete pile with a working load of 515.57 kN at a depth of 30 meters. It uses modified Hilleys formula to calculate that the allowable penetration per last 10 blows during pile setting is 23.9 mm, based on factors like the hammer weight, soil type, proposed hammer drop, pile dimensions, and temporary elastic compression factor.

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Raditya AzkaLaode
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369 views2 pages

400mm RC Pile Set Calculation

This document contains a pile set calculation for a 400mm x 400mm reinforced concrete pile with a working load of 515.57 kN at a depth of 30 meters. It uses modified Hilleys formula to calculate that the allowable penetration per last 10 blows during pile setting is 23.9 mm, based on factors like the hammer weight, soil type, proposed hammer drop, pile dimensions, and temporary elastic compression factor.

Uploaded by

Raditya AzkaLaode
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as XLS, PDF, TXT or read online on Scribd
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Title : abc Job Ref: Testing

Date 9-Sep-19
Time : 8:30
Designed By: Se TH
PILE SET CALCULATION FOR 400 mm x 400 mm RC PILE C1 Checked By : Ir. Se Thiam Hai
Reference Calculation Output

PILE SET CALCULATION FOR 400 mm x 400 mm RC PILE (WORKING LOAD = 515.57 kN AT 30 m
Set Calculation For Hammer Driven Piles Using Modofoed HILLEY's Formula
Based on Table 193, Reinforced Concrete Designer's Handbook - 9th Edition

Hammer Used = Freely Falling Drop Hammer


Pile Size = 400 mm
Pile Design Working Load = 515.57 kN
Estimated Pile Penetration Length, L = 30 m
Assumed Type of Driving = Medium
Weight of Hammer, w = 80 kN
Factor of Safety, Fs = 2.5
k Factor = 0.5
Weight of Helmet, Dolly & Stationery Parts = 5 kN
Type of Soil = Clay
Proposed Hammer Drop, H = 200 mm

Self Weight of Pile, Wp = 0.4 x 0.4 x 30 x 24


= 115.2 kN

Combined All Weight, P = 115.2 + 5


= 120.2 kN

Settlement Load, Wm = [515.57 + 120.2] / 0.5


= 1271.54 kN

Driving Pressure, p = 1271.54 / [400 x 400]


= 0.00794713 kN/mm2

Temporary Elastic Compression Factor

c1 (For Pile) = 0.044pL = 0.044 x 0.00794713 x 30 = 0.01049021


c2 (For Helmet and Dolly) = 0.56p = 0.56 x 0.00794713 = 0.00445039
c3 (For Ground) = 0.44p = 0.44 x 0.00794713 = 0.00349674

Therefore, The Temporary Elastic Compression Factor, Ac


= 0.5 x 64.8 x [0.01049021 + 0.00445039 + 0.00349674]
= 0.59736982

Efficiency of Blow
= P/w = 120.2 / 5 = 1.5025 = 1.5

Table 193 e = 0.44

Hiley Formula (Modified)

Settlement Load, Wm = [(W x H x e x n) / (1 + ac x n)] + W + P

Numbers of Blows, n = [Wm - w - P] / [(w x H x e) - (Wm - w - P) x ac]

Wm - w - P = 1271.54 - 80 - 120.2 = 1071.34

wxHxe = 80 x 1.0 x 200 x 0.44 = 7040

Therefore Numbers of Blows, n = 1071.34 / [ 7040 - (1071.34 x 0.59736982)]


= 0.167397

Therefore, The Allowable Penetration (mm) Per Last 10 Blows During Pile Setting
s = 10/(n x Fs) = 10 / (0.167397 x 2.5) = 23.9 mm
Title : abc Job Ref: Testing
Date 9-Sep-19
Time : 8:30
Designed By: Se TH
PILE SET CALCULATION FOR 400 mm x 400 mm RC PILE C1 Checked By : Ir. Se Thiam Hai
Reference Calculation Output

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