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Form Work Tie Rod Calculation

This document summarizes the design calculations for tie rods in a sedimentation wall. It includes: 1) Calculation of maximum lateral concrete pressure of 31.68 KN/m^2 based on formwork height, concreting rate, temperature and concrete properties. 2) Calculation of tie rod loads at different heights of the wall based on lateral pressure, area and safety factors. 3) Verification that the allowable load capacity of the selected 14.93mm diameter steel tie rods exceeds the calculated loads.

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Nalin
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855 views2 pages

Form Work Tie Rod Calculation

This document summarizes the design calculations for tie rods in a sedimentation wall. It includes: 1) Calculation of maximum lateral concrete pressure of 31.68 KN/m^2 based on formwork height, concreting rate, temperature and concrete properties. 2) Calculation of tie rod loads at different heights of the wall based on lateral pressure, area and safety factors. 3) Verification that the allowable load capacity of the selected 14.93mm diameter steel tie rods exceeds the calculated loads.

Uploaded by

Nalin
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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Project: KG-1 SHEET NO : 1

Element: Sedimentation wall DESIGNER : Nalin


DATE : 15/02/2005
ref Calculation Results

1 Concrete Lateral pressure Calculation.

[
Pmax =D [ C1 √ R ]+ D C2 K ( √ H−C 1 √ R ) ] OR Pmax  DH
Whichever is the smaller.

a. Formwork vertical height , H= 2.21 m


b. Average rate of concreting , R= 1 m/Hr
c. Temperature of concreting at the time of placing, t= 24 centi.
d. Type of cement C2,= 0.3
e. Density of concrete, D= 25 KN/m3
f. Coefficient of formwork of wall, C1 = 1

Pmax = 31.6825 KN/m2 OR Pmax =Dh = 55.25 KN/m2

( )
2
36
Where, K= 0.81 K=
t+16
The maximum concrete lateral Pressure= 31.68 KN/m2

2 Concret Lateral pressure Distribution

3 Tie Rod Calclation

Load Calculation

F=( P max × A×F s 1 + F c ×F s2 )


Fs1 = 1.5
Where Fs1, Fs2- Safety factors Fs2 = 1.4
Fc- Compaction Load, Cosider 6KN
PROJECT : SHEET NO :
ELEMENT : DATE :

reference Calculation

T18, Tie Rod diameter 14.93mm and Net Area, A = 174 mm2
Use G 43 Steek, Ps = 215 N/mm2

Let Tie Rod Spacings @ 600mm at 450mm height P1 = 31.7 KN/m2


F1 = 23.4 KN Spacing = 0.6 m

Tie Rod Spacings @ 600mm at 1050mm height P2 = 29.3 KN/m2


F2 = 24.2 KN Spacing = 0.6 m

Tie Rod Spacings @ 1200mm at 1650mm height P3 = 15.9 KN/m2


F3 = 25.6 KN Spacing = 1.2 m

Tie Rod Spacings @ 1200mm at 2250mm height P3 = 2.5 KN/m2

F3 = 10.0 KN Spacing = 1.2 m

Fallowable = Ps* A = 37.41 KN > F1,F2,F3,F4

It is OK.

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