ZSsoldierPileWall features

ZSsoldierPileWall™ is a standalone application to analyze excavations protected by soldier pile walls, based on the ZSOIL.PC 3D [7] FEM software. The program can alternatively be used as a pre-preprocessing template within ZSoil in order to speed-up data generation.

ZSsoldierPileWall™ is a 3D FEM calculator basing on the ZSOIL.PC 3D software, designed to carry out detailed analyses of excavations protected by soldier pile walls. It includes a coupled formulation for fully- and partially saturated two-phase media and advanced constitutive laws for soils. ZSsoldierPileWall™  analyzes excavation sequences including intermediate stability and thermal expansion checks.
In addition ZSsoldierPileWall™ 2019 offers:

  • a user-friendly graphical interface
  • simplifi ed overall input strategy
  • automated and user-configured, ready to print reporting (see examples Tutorial 1 or Tutorial 2)

ZSsoldierPileWall™ offers a variety of supporting systems which can be associated with excavations:

  • soldier pile walls (piles with steel profiles, RC piles, steel profiles)
  • tiebacks – anchors, nails
  • internal bracing – struts

Finite element models which are generated by ZSsoldierPileWall™, can be opened with the standard version of ZSoil® (*.inp file). This allows the models to be modified in order to analyze specific conditions which are not handled in the template, and then recalculated. Moreover, results of the completed analyzes, can be visualized using the ZSoil post-processor, whenever some specific outputs are requested.

ZSsoldierPileWall™ offers the following capabilities:

  • fast pre-processing of box-shaped excavations based on automatic finite element mesh generation, including volumetric locking-free finite elements (eight node BBAR, EAS) and an advanced mesh tying technique used to connect dense (in the zone close to the retaining wall) and coarse (at a certain distance from the retaining wall) meshes with a very high level of accuracy
  • modeling Soldier Piles (RC piles, full or partial length piles with embedded steel profiles, or steel profiles), lagging material (wood, concrete or any other), anchors, micropiles (as anchors with a very short free length), and struts
  • accounting for surface loads
  • advanced soil modeling using the Hardening-Soil model [4, 5], which is commonly recognized and accepted by the geotechnical community (refer to [3] for comprehensive descriptions on theory, parameter selection and examples of case studies). The model is extended to account for strong stiffness variation in the range of small-strains [1].
  • fully coupled (consolidation) or weakly coupled steady-state analyses including the effects of partial saturation in soil (soil water retention curve model by van Genuchten [6]) -for the theory, refer to [7].
  • intermediate stability checks based on incremental tan φ – c reduction algorithm


ZSsoldierPileWall™ can alternatively be used as a template pre-preprocessor in ZSoil [7] in order to speed-up data generation.

ZSsoldierPileWall™ requirements:

  • Processor : i5, i7 or Intel XEON; AMD not supported
  • System 64 bit: Windows: Windows 7 ,Windows 8 or 10
  • Update for Universal C Runtime in Windows is required for Windows Server 2012 R2, Windows 8.1, Windows RT 8.1, Windows Server 2012, Windows 8, Windows RT, Windows Server 2008 R2 Service Pack 1 (SP1), Windows 7 SP1, Windows Server 2008 Service Pack 2 (SP2), Windows Vista SP2 (see: https://support.microsoft.com/en-us/help/2999226/update-for-universal-c-runtime-in-windows)
  • RAM : 8-16GB of RAM recommended
  • Hard-disk space : 50 GB
  • Graphical resolution : higher than 1280 x 1024 (1024 x 768 supported)

[1] T. Benz. Small-strain stiffness of soils and its numerical consequences. Phd, Universitat Sttutgart, 2007.
[2] F. Kulhawy and P. Mayne. Manual on estimating soil properties for foundation design. Technical report, Electric Power Research Institute (EPRI), 1980
[3] R. Obrzud and A. Truty. The hardening soil model – a practical guidebook. Technical Report Technical report ZSoil.PC 100701, Zace Sevices Ltd, 2012.
[4] T. Schanz. Zur modellierung des mechanischen verhaltens von reibungsmaterialien. Mitt. Inst. für Geotechnik, Universitat Stuttgart, 1998, 45, 1998.
[5] T. Schanz, P. Vermeer, and P. Bonier, editors. Formulation and verification of the Hardening Soil model. Beyond 2000 in Computational Geotechnics. Balkema, Rotterdam, 1999.
[6] M. van Genuchten. A closed-form equation for predicting the hydraulic conductivity of unsaturated soils. Soil Sci. Soc. Am. J, 44:892–898, 1980.
[7] ZSoil. User manual ZSoil.PC v2018, Soil, Rock and Structural Mechanics in dry or partially saturated media. ZACE Services Ltd, Software Engineering, Lausanne, Switzerland, 1985-2018.