PERMISSIBLE VALUES

Permissible compressive stress of Concrete (\(σ_c\)): N/mm²

Permissible compressive stress of Steel (\(σ_{st}\)): N/mm²

Tensile strength of Steel (\(σ_t\)): N/mm²

Modulus of Elasticity of Concrete (\(E_c\)): N/mm²

DESIGN OF MAXIMUM THICKNESS AND REINFORCEMENT

1. NORMAL CONDITION

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

Internal water pressure at base of shaft (\(P_{in}\)): kN/m²

External water pressure at base of shaft (\(P_{on}\)): kN/m²

Permissible compressive stress in concrete in Normal condition (\(σ_{ca}\)): N/mm²

Check for permissible stress :

2. UPSURGE CONDITION

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

Internal water pressure at base of shaft (\(P_{iu}\)): kN/m²

External water pressure at base of shaft (\(P_{ou}\)): kN/m²

Permissible compressive stress in concrete in Upsurge condition (\(σ_{cu}\)): N/mm²

Check for permissible stress :

REINFORCEMENT DESIGN

1. HOOP REINFORCEMENT

Area of reinforcement (\(A_{st}\) ): mm²

Area of reinforcement provided (\(A_{stph}\)) : mm²

2. LONGITUDINAL REINFORCEMENT

Area of reinforcement (\(A_{stm}\)) : mm²

Area of reinforcement provided (\(A_{stpl}\)) : mm²