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Structures & Foundations
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Soil & Rock Mechanics

Starting the 1st of January 2023, GeoDev will centralize all activities around ZSOIL : Research & Development, Customer Support, Training Courses and Sales.

Click here to learn more about GeoDev.


Online by Zoom and Live at HEIA-FR, Route des Arsenaux 41, 1700 Fribourg, room Ars3.383, Friday 25.8.2023 09.00 – 16.30

Organised by GeoDev Sàrl et ITEC-HEIA Fribourg

Also celebrating 38 years of ZSOIL

Registration is open now: Registration form


Numerical simulation in geomechanics, constitutive aspects, soil-structure interaction and associated structural analysis with emphasis on present and future engineering practice: theory, applications, case studies, failure analyses, optimisation, probabilistic approaches.


The symposium combines invited presentations, and contributions by ZSOIL users and others. It has been taking place every year in late summer over the past twenty years, at the Swiss Federal Institute of Technology, in Lausanne and newly at Haute Ecole d’Ingénierie et d’Architecture de Fribourg.


09h00-10h45: chair RO

5’ S. Commend Welcome address

35’ Invited lecture: M. Brandtner, A. Poisel: A numerical time travel with stops at different problem statements

25’ G.W. Byun: Dynamic analysis for ground movement due to blast load on NATM tunnel

25’ J. Minini, M. Dupays, S. Commend: Prediction of diaphragm wall displacements using live-bayesian model calibration

15’ Y. Ji: Application of Ultra High Strength Concrete (UHC) Pipe Pile for 200-m super-high-rise building


10h45-11h00: coffee break


11h00-12h30: chair SC

25’ R. Obrzud, R. Maye: Application of thick shells to modeling diaphragm walls in large scale 3D models

25’ M. Preisig: Theory, application and validation of interface elements

25’ A. Truty: Estimating Hardening Soil model parameters for sands based on CPTU tests and laboratory experimental evidence

15’ F. Pachla, K. Podleś, A. Urbanski: Numerical Analysis of Historic Masonry Arch Viaduct


12h30-14h: lunch break


14h00-15h15: chair MP

25’ A. Truty: New developments in ZSoil v2023 midyear upgrade. Why do we need full van Genuchten's law, Biot coefficient and modified Bishop effective stress principle?

20’ J. Levkov, L. Léchot: Using conditional random fields to model slope instabilities

20’ M. Delage, G. Jacot-Descombes: Modeling wood joints with Zsoil


15h15-15h30: coffee break


15h30-16h30: chair KP

15’ Y. Ji: Modelling the process of correcting inclination building by jack-up method in Henan Province, China

25’ A. Truty: Heat exchangers in ZSoil 2024

20’ S. Kivell: What's new within ZSoil 2024?


17h-19h: cocktail dinner


Engineers and developers confronted with the need to perform accurate numerical simulations or optimisations for complex underground, above ground or combined constructions have an opportunity to exchange experience, see state of the art presentations of recent case studies and get a comprehensive introduction to numerical simulations in 2D or 3D, with ZSOIL, in dry or partially saturated rock or soil, with full structural capabilities, soil-structure interaction, interfaces, thermal effects, ultimate load evaluation, continuous safety assessment, including creep, swelling, dilation, dynamics, uncertainty quantification with UQlab etc.


ZSOIL is a user-friendly 2D/3D finite element package for soil, rock and soil-structure analysis available and used worldwide since 1985, and continuously upgraded. The program was developed at Zace Services Ltd, by a team of engineers with research experience at the Swiss Federal Institute of Technology in Lausanne, UC Berkeley, California Institute of Technology, Purdue University, Cracow University of Technology, Stanford University and UC Davis . The aim is to provide civil engineers with a simple tool to accurately support geomechanical and structural engineering analysis, dimensioning and optimisation. Since ZSOIL first came out in 1985 it has steadily gained worldwide acceptance among practitioners as well as teachers and researchers. Today, upto ten free student versions are downloaded every day.


FEE: 200 CHF (free for speakers & HEIA Fribourg affiliates, 50% discount for ZSOIL owners,
10 CHF for students). Registration required.

Please prepay to GeoDev Sarl, Epinettes 32, 1007 Lausanne, Switzerland
Payment in CHF to : CREDIT SUISSE (Suisse) SA, CH-1001 Lausanne,
account n° 1294343-91, IBAN CH51 0483 5129 4343 9100 0, BIC/SWIFT CRESCHZZ80A

with mention “ZSOIL symposium”, and your name and affiliation



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