Core Calculation Parameters of Steel Sheet Pile Cofferdam

Steel Sheet Pile Embedment Depth Calculation

 

External Forces of Steel sheet pile mainly are active ground-breaking pressure, passive earth pressure, water pressure and wave pressure.

When calculating the core parameters are :

M: external torque on the base surface
Ea: Pressure on the center line of cofferdam
B = 8.0m, inside friction angle = 20 °
Calculated, Shear K = 0.74> 0.7

Anti-Overtuning and Stability Calculation

 

Core parameters:
G: weir body weight per meter
T: friction per meter of sheet pile soil with the base
Calculated, Tilt K = 11.97 > 1.4

The sliding Stability Calculations

 

Core parameters:
S: the shear strength of each steel sheet pile, S = Aτ
A: steel sheet piles per meter of basal area
τ: is the ultimate shear strength of pile
Calculated, Slip K = 16.24> 1.4

Steel Sheet Pile Inner Force Calculation

 

Inner Force calculation of determine the location of steel sheet pile when the shear is zero, then calculate the point’s moment, the maximum bending moment of steel sheet pile.

According to the structural type of steel sheet pile, we can get W = 850cm³, [σ] = 200MPa

From calculation, the internal forces for the steel sheet pile is 62.37MPa which meets strength requirements.