1.4 Straight Web SP560x2

Straight Web Sheet Piles


Most sheet piles rely on their bending strength and stiffness to retain the soil or water, whereas straight web sheet piles are designed to form cylindrical structures, generally closed, retaining a soil backfill.

Straight Web sheet piles are mostly used on projects where rock layers are close to ground level, where the excavation depth removes toe support, or where anchoring cannot be reasonably provided. Straight web sheet pile structures are constructed as circular cells or diaphragm walls depending on the site characteristics or the particular requirements of the project. The large diameter of each cell, and contained soil mass ensures stability of the structure.

The forces developing in straight web sheet pile sections are essentially horizontal traction forces requiring interlocks especially designed for declutching resistance, corresponding to the horizontal force in the web of the pile. Straight web sheet piles can rotate up to 4.5 degrees per interlock, greater rotation can be achieved by special bending of the sheet pile up to 12 degrees.

Straight Web Pile Sheets

AS500 Series of Straight Web Pile Sheets

Section Width* Thickness Interlock Strength Interlock
Rotation**
Sectional
Area
Mass Section Modulus  Moment of Inertia
  b mm t mm kN/m δ  ° cm2/m Pile
kg/m
Wall
kg/m2
cm3/m cm4
AS 500 9.5 500 9.5 3000 4.5 162.6 63.8 128 46 168
AS 500 11.0 500 11 3500 4.5 180.0 70.6 141 49 186
AS 500 12.2 500 12 5000 4.5 189.2 74.3 149 51 196
AS 500 12.5 500 12.5 5500 4.5 194.5 76.3 153 51 201
AS 500 12.7 500 12.7 5500 4.5 196.4 77.1 154 52 204

* Use 503 mm for template construction and layout drawings

** Rotation decreases to 4.0 degrees for piles over 20.0 m in length.


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