Walls and steep slopes

As Figure 15.1 shows, there are four published execution standards and one draft that are concerned with the execution of walls and steep slopes, as discussed in the following sub-sections.

15.3.1 Sheet pile walls

Figure 15.6 summarizes the scope of EN 12063,6 which deals with the execution of sheet pile walls including tubes and sheet piles, U-box and U-sheet piles, Z-box and Z-sheet piles, H-beams, and timber piles.

No design methods are provided for establishing the length or modulus requirements for sheet piles: these should be established from other standards and acceptable design methods.

Guidance on the handling of sheet piles is provided in Annex A and on suitable driving methods in Annexes C and D.

Welding requirements for sheet piling are discussed in detail and depend on the type of welded assembly (lengthened, strengthened, junction, or box piles). The type (visual or ultra-sonic) and extent (10, 50, or 100%) of testing of various joints (butt, lap, corner, T, or oblique T) are indicated.

Particular consideration is given to the permeability of sheet piles and where there is a need to reduce the overall permeability of the wall interlock sealing. Annex E provides an analytical method for assessing discharge through a sheet pile wall.

EN 12063 was published by CEN in 1999 and confirmed in 2005 for a further five years.

{Normative referenceTT-

I terms and definitions I symbols

Definitions

Information needed for the execution of sheet pile waUs|-

I sails and rock investigation I driveability of sheet piles

Site investigations

| steel sheet piles timber sheet piles j other materials and products corrosion protection for steel sheet piles and preservation of wooden sheet piles

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