PERMISSIBLE VALUES

Permissible compressive stress of Concrete (\(σ_c\)):

Permissible compressive stress of Steel (\(σ_{st}\)):

Tensile strength of Steel (\(σ_t\)):

Modulus of Elasticity of Concrete (\(E_c\)):

DESIGN OF MAXIMUM THICKNESS AND REINFORCEMENT

1. NORMAL CONDITION

Internal water depth at base of shaft (\(h_{wn}\)):

Internal water pressure at base of shaft (\(P_{in}\)):

External water pressure at base of shaft (\(P_{on}\)):

Permissible compressive stress in concrete in Normal condition (\(σ_{ca}\)):

Check for permissible stress :

2. UPSURGE CONDITION

Internal water depth at base of shaft (\(h_{wu}\)):

Internal water pressure at base of shaft (\(P_{iu}\)):

External water pressure at base of shaft (\(P_{ou}\)):

Permissible compressive stress in concrete in Upsurge condition (\(σ_{cu}\)):

Check for permissible stress :

REINFORCEMENT DESIGN

1. HOOP REINFORCEMENT

Area of reinforcement (\(A_{st}\) ):

Area of reinforcement provided (\(A_{stph}\)) :

2. LONGITUDINAL REINFORCEMENT

Area of reinforcement (\(A_{stm}\)) :

Area of reinforcement provided (\(A_{stpl}\)) :