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Solution To Assignment No.1 - Wall Formwork Design Calculation Determining Concrete Pressure acting on formwork K=(36/(7+16))sq= C2=0.45
Wi=0.6+(0.8-0.6)/5*h
Ai=10.0*Wi
(Mix w/retarder)
2.450 H = 6.0 m
R=6.75/A (Q=9/2= 4.5 m3/h, 2 trucks of 4.5 m3 in two hours)
Pmax=25(1.0*sqrt(R) + 0.45*K*sqrt(5.0-1.0*sqrt(R))) or D*h whichever is the smaller
Depth
Total Width Plan Area
h
Wi
m 0.00 1.00 2.00 3.00 4.00 5.00
m 0.600 0.640 0.680 0.720 0.760 0.800
Ai=10.0*Wi m2 6.000 6.400 6.800 7.200 7.600 8.000
Rate of Rise
Hydrostatic D*h
Pmax
(Assume lowest temperature for the max. design conc. Pressure)
(CIRIA Report 108) Design Pressure
Elev. above bottom
R m/h 0.750 0.703 0.662 0.625 0.592 0.563
kN/m2 77.69 77.19 76.73 76.31 75.93 75.57
kN/m2 0.00 25.00 50.00 75.00 100.00 125.00 P max
kN/m2 m 6.00 0.00 5.00 25.00 4.00 50.00 3.00 75.00 2.00 75.93 1.00 75.57 75.93 kPa
Elevation above bottom (m)
C1=1.0 (Wall Form)
Conc. Pressure Diagram
1
2
3
4
Design Concrete Pressure :
75.93, say 85 kPa throughout the height 5
2 marks
6
0.00
20.00
40.00
60.00
80.00
Conc. Pressure (kN/m2)
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Solution To Assignment No.1 - Wall Formwork Design Calculation WALL FORM DESIGN
Hydrostatic
Design Information Design Concrete Pressure (Refer to the "Concrete Pressure" Spread Sheet) Allowable Deflection not exceed Tie Rod Spacing not less than
kPa Span m
75.93 1/360 0.9
Design Conc. Pressure Diagram
75.93 kPa Conc. Stiffening Design Concrete Enevlope
Formwork Components Plywood (1-m width) Waling Soldier
Formwork Component
Recommeded Spacing (to the nearest 25 mm)
Formwork Component Spacing to be Used (m) udl (kN/m) Plywood 75.93 Waling 0.150 11.39 Soldier 1.325 100.61 Toe Rod 1.000 Max. Tension in each Tie Rod =75.93kPa *1.325*1.000 = Assessment Plan
Moment of Resistance (kNm) 0.46 2.025 10.5
Key Skills
F1
Communication, IT and Numeracy
F5
Analytical & Problem Solving
P1
Presentation & Autonomy
Bending Moment Coefficient 0.1 0.1 0.1
Bending Stiffness EI Shear Load (kN) (kNm2) 3.25 6.86 119.14 12.8 200.35 64.5
Shear Force Deflection Coefficient Coefficient 0.6 0.007 0.6 0.004 0.6 0.004
Max. Spacing (m) calculated from Bending Moment 0.246 1.333 1.022
Shear 0.151 1.873 1.069
Deflection 0.257 1.937 1.114
Max. Spacing (m) 0.151 (Waling) 1.333 (Soldier) 1.022 (Tie Rod)
Check Tie Rod Spacing Crtiterion N/A N/A N/A OK (Horizontal Tie Rod Spacing>0.90 m) OK (Vertical Spacing > 0.90 m)
100.61 kN Criteria Accuracy of Calculations & Sketching (3 mark) Loading Determinination (2 marks) & Correct Use of Formulas (2 marks) Neatness & Clarity in Presentation (1 mark) & Design Criteria Checks (2.5 marks) Total
Marks
7.0 3.5 10.5
Marks
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