14:00
Peridynamic Framework for Modeling Excavation Processes in Mechanized Tunneling
Sahir Butt (Ruhr University Bochum), Joerg Renner (Ruhr University Bochum), Günther Meschke (Ruhr-Universität Bochum)


Kurzfassung:
A peridynamic framework for modeling the mechanical response of geomaterials under complex loading scenarios is presented. For porous rocks, the model incorporates pore compaction mechanisms motivated by experimental observations. The model uses a pressure-dependent failure criterion motivated by the asymmetry between tensile and compressive behavior. It is applied to simulate the excavation process in mechanized tunneling via full-scale Linear Cutting Machine tests. A good match between the predicted forces and experiments is demonstrated.

14:20
Mechanics of Longitudinal Joints in Segmental Tunnel Linings: A Rigid-Plate-Spring (RPS) Method Enhanced by Physics-Informed Neural Network (PINN)
Zhen Liu (Tongji University), Chen Xu (Ruhr University Bochum), Ba Trung Cao (Ruhr-Universität Bochum), Xian Liu (Tongji University), Yong Yuan (Tongji University)


Kurzfassung:
A physics-informed Rigid-Plate-Spring (RPS) method is established to learn compression-only spring laws for symmetric tunnel joints. The method is then developed to be able to consider asymmetric joint configurations and connectors. Taking full-scale joint tests and structural tests for validation, the developed method can accurately capture joint behavior both in joint level and structural level, enabling efficient design and O&M assessments.

14:40
The Hydro-mechanical Interaction between Different Tunnel Support Strategies and the Excavation Damaged Zone (EDZ)
Sina Shivaei (Ruhr-Universität Bochum), Maximilian Schoen (Ruhr Universität Bochum), Arash Alimardani Lavasan (Luxembourg University), Torsten Wichtmann (Ruhr-Universität Bochum)


Kurzfassung:
Mechanized tunneling in swelling clay shale induces stress redistribution, shear localization, and EDZ damage with increased permeability, promoting water inflow, swelling, and higher lining loads. A coupled HM FE model (LAGAMINE, Barcelona Basic Model, local second gradient model) shows that most EDZ growth occurs during excavation, while a deformation-tolerant support yields similar EDZ size but reduces lining stresses by about $60$–$75%$.

15:00
Numerische Auswertung von Dehnungsmessungen in Tübbingen einer segmentierten Tunnelschale
Maximilian Sorgner (TU Wien), Florian Stadlbauer (TU Wien), Ali Razgordanisharahi (TU Wien), Thomas Pilgerstorfer (GeoConsult), Bernd Moritz (ÖBB-Infrastruktur), Christian Hellmich (TU Wien), Bernhard Pichler (TU Wien)


Kurzfassung:
Die Tunnelschale im Baulos 3 des Koralmtunnels besteht aus vorgefertigten Stahlbeton-Tübbingen. Einzelne Messringe, bestehend aus sieben Tübbingen, sind mit Dehnungsmesssensoren ausgestattet, um die Verformung der Tübbinge in Umfangsrichtung zu erfassen. Die Messdaten werden unter Anwendung eines viskoelastischen Modells für gut aushydrierten Beton in Normalspannungen und zugehörige Auslastungsgrade der Tübbinge übersetzt.