World trade is steadily increasing, leading to a high demand for economic solutions for quay walls. The combined steel pile wall is the most common steel construction solution. The primary elements are king piles, while intermediate piles function as secondary elements. The design of these secondary elements is governed by section 5.5.2 of EN 1993-5 [9]. The test-based method described in section 5.5.2(5) and (6) is used to generate the characteristic water pressure resistance values of the different combinations of I-shaped king and Z-shaped intermediate piles, each in different steel grades, which are given in the product catalogue of ArcelorMittal [1]. The test series executed and the subsequent setting-up and validation of a numerical model are presented in detail in this paper. A numerical model was used for a parametric study. The different failure modes observed in this parametric study are presented. A statistical evaluation according

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In port structures and other deep excavations, the HZ ® -M/AZ sheet pile wall is widely used as quay wall due to its high bending resistance and stiffness. Each system consists of an HZ ® -M king pile, that acts as a bearing element and two intermediate AZ sheet piles (or infill sheet piles), ensuring the horizontal load transfer (soil pressure, water pressure..) to the king piles. The HZ ® -M and AZ profiles are connected by the RZ connectors (RZD and RZU), while the AZ profiles are installed as double piles connected by a Larssen interlock, as it is shown in the Figure 1. When arching effect is ensured, earth pressure loads will be taken by the king piles and the infill sheets should only transfer the loads from the water pressure. Figure 1 Cross-section of an HZ ® -M wall panel -an example with HZ 1080M A and AZ 25-800 profiles (Source [1]).