A metal sheet pile has an improved joint strength and is suitable for high

productivity manufacturing. Right and left end flanges are formed at

opposite sides of the rolled steel sheet pile. Joints are formed at edges

of the right and left end flanges. Cross-sections of the joints are point

-symmetric or line-symmetric, wherein the end flange and the joint are

disposed

so that a center of point-symmetry of a pair of interfitted joints is

located on or near a centerline of the end flange in the thickness

direction. Furthermore, the joint has a protrusion for preventing rotation

near the border between the joint and the end flange portion.
Sheet pile walls are usually used in soft soils and tight spaces. Sheet

pile walls are made out of steel, vinyl or wood planks which are driven

into the ground. For a quick estimate the material is usually driven 1/3

above ground, 2/3 below ground, but this may be altered depending on the

environment. Taller sheet pile walls will need a tie-back anchor, or

"dead-man" placed in the soil a distance behind the face of the wall, that

is tied to the wall, usually by a cable or a rod. Anchors are placed

behind the potential failure plane in the soil.
It is very important to have proper drainage behind the wall as it is

critical to the performance of retaining walls. Drainage materials will

reduce or eliminate the hydrostatic pressure and will therefore greatly

improve the stability of the material behind the wall, assuming that this

is not a retaining wall for water. Sheet piling is a form of driven piling

using thin interlocking sheets of steel to obtain a continuous barrier in

the ground. The main application of steel sheet piles is in retaining

walls and cofferdams erected to enable permanent works to proceed.

Normally, vibrating hammer, t-crane and crawle drilling are used to

establish sheet piles.

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