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Type IV sheet piling

Type IV sheet piling design was performed in accordance with BS8081. The anchor should be located as close to the bulkhead as possible but should be far enough that the full passive earth pressure can be utilized to resist the anchor pull. When increased section modulus or inertia is required to cater for high bending moments over part of the pile length, it may be economic to attach appropriately sized plates to the pans of the piles to locally enhance the engineering properties of the section.

The vertical position should be above ground water level but with sufficient overburden. It is generally economic to consider this option rather than just selecting type 4 steel sheet piles when the pile is very long or when the pile is at the top of the range anyway. Type ISP, JSP, KSP, NKSP, JFE,JFESP have good properties, and type FSP, NS-SP, SKSP, TSP,GSP area also good profiles.

This is particularly important when the anchor pull is not horizontal such as the practice of tying the anchor rod to the cap of the wall. The effects of the various load cases were considered.
Geotechnical loads were calculated from representative soil parameters and considered working load values. SP-IV sheet pile capacity was designed to have a factor of safety of 2.0 (uncorroded) and 1.75 (corroded) on static load conditions. Separate additional tie rods provided for quick release hooks. No bollard loads were considered in the main tieback system. The SP-4 sheet piles should be located far enough so that it will not add loading to the wall. Type IV sheet pile is 400x170x15.5



Section Dimensions Sectional Area Mass Moment of inertia Modulus  of section 
Width Height Thickness Pile Wall
b h/2 t          
mm Mm mm cm2/pile kg/m kg/m2 cm4/m cm3/m
400 170 15.5 97 76.1 190 38600 2270

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