HIGH MODULUS Z SHEET PILE WALL
- Robust and Resilient Wall System with High Cost Efficiency -Table of Contents
Chapter 1Introduction ······················································································································1

Chapter 2Wall Configuration ············································································································1

Chapter 3

Wall Properties ·················································································································23-1 Denomination of the Steel Plates ···············································································23-2 Comparison Table of High Modulus Z Sheet Pile Wall and RC Wall ···························2Chapter 4

Retaining Wall Design ·······································································································34-1 General ·······················································································································34-2 Embedded Depth of High Modulus Z Sheet Pile Wall ················································44-3 Durability ····················································································································50Chapter 1 Introduction
The purpose of this document is to provide model practice guidelines for the design of the High Modulus
Z Sheet Piles to be installed, using the Press-in Piling Method.

The Press-in Piling Method is commonly used worldwide because of its very quiet operation, ultra-low
vibration, and flexibility of sizes to suit different wall properties and subsoil conditions.

The main attributes of the High Modulus Z Sheet Piles are efficiency of physical properties and versatility.
The efficiencies of physical wall properties can be optimized in view of the flexibility of plates size for theground conditions and the form of the loading.

Chapter 2 Wall Configuration
High Modulus Z Sheet Pile is a combined retaining wall with great bending stiffness, which incorporates
the following elements.
High Modulus Z Sheet Pile Wall

Figure 1. Wall Configuration

1

Chapter 3 Wall Properties
The high modulus Z sheet piles are installed to a depth necessary to achieve the required passive toeresistance to reach static equilibrium with an adequate factor of safety.

3-1 Denomination of the Steel Plates
The profiles of the High Modulus Z Sheet Pile Walls are related to their dimension as follows: AZ52-700 – CP – 18.5”×0.5”, 17.5×0.5”

Base Size of

Cover Plates

Sheet Pilefor Reinforcement

Size ofCover Plates

3-2 Comparison Table of High Modulus Z Sheet Pile Wall and RC Wall
Table 1.

Wall Profiles

2Chapter 4 Retaining Wall Design
4-1 General
Both the steel sheet pile and steel plates act as the primary structural element of the wall. In order tohave an economically efficient wall design, the steel plates should only be placed along the depths of thewall where the moment and lateral deflections are the highest. In most cases, the steel plates can beconnected to the sheet pile through fillet welds. The size and length of the welds will depend on thestresses produced by the lateral soil loads for each specific case.

Figure 2. Welding Configuration3

4-2 Embedded Depth of High Modulus Z Sheet Pile Wall

Figure 3. Cross Section (Retaining Wall)44-2-1 Embedded Depth of High Modulus Z Sheet Piles Dpri
Limit equilibrium methods can be used to assess the required embedded depth of sheet piles. Themethods use an approach based on soil and groundwater parameters that tend towards worst credible
values and assume that the full strength of the ground is mobilized uniformly around the wall so that thewall is at the point of collapse.
Design parameters could govern the embedded depth of the High Modulus Z Sheet Piles are:•stratigraphy;•soil unit weight;•soil strength (cu, c', φ');•groundwater levels;•surcharge loads;•horizontal impact loads;•retained height;•

durability/corrosion rates; and•propped or cantilevered.

4-3 Durability
The effective life of the High Modulus Z Sheet Pile Wall depends upon the combined effects of imposed
stresses and corrosion.
Performance is clearly optimised where low corrosion rates exist at positions of high imposed stresses.

56