Autor(en): | Nagel, F.; Stascheit, J.; Meschke, G. |
Titel: | A Numerical Simulation Model for Shield Tunnelling with Compressed Air Support |
Kurzfassung: | This paper is concerned with a numerical simulation model (ekate) specifically designed for shield tunnelling in fully and partially saturated soils based upon the Finite Element Method (FEM). The model considers all relevant components - the soil, the lining, the tail void grouting, the hydraulic jacks and different types of face support - involved in shield tunnelling. The surrounding soft soil is formulated as a three-phase material, consisting of the soil skeleton, pore water and air. This model allows for the simulation of consolidation processes in partially saturated soils as well as of flow of compressed air often used as temporary face support during repair interventions at the cutting wheel. Despite the complexity connected with the relatively high degree of realism of the simulation model, only little effort is required from the user to establish a realistic 3D model for shield tunnelling. To this end an automatic model generator has been developed which allows for a user friendly generation of the discretized model including all components involved and to investigate variants with a minimum effort for the user. The model allows for realistic predictions of settlements and also provides information on deformations and stresses in the ground, the lining and the TBM, respectively. In addition to its use as a prognosis tool in the design process, in particular for tunnelling projects in sensitive urban areas, the model also may be used to assist the driving and steering process in mechanized tunnelling. The paper provides an overview over the main components of the model, the automatic model generator and the tri-phasic representation of the soil. A simulation of a compressed air intervention of a shield tunnel in soft soil demonstrates the applicability of the model. |
Erschienen in: | Geomechanik und Tunnelbau 1 (2008), Heft 3 |
Seite/n: | 222-228 |
Sprache der Veröffentlichung: | Deutsch |
Ich möchte den Artikel kaufen
Diesen Artikel können Sie für 25 € als PDF (0.75 MB) erwerben. Das PDF kann gelesen, gedruckt und gespeichert werden. Eine Vervielfältigung und Weiterleitung an Dritte ist nicht gestattet. |
Ich bin Online-AbonnentAls Online-Abonnent der Zeitschrift "Geomechanik und Tunnelbau" können Sie diesen Artikel über Wiley Online Library aufrufen. |
Ich möchte "Geomechanik und Tunnelbau" abonnierenDieser Beitrag ist in der Zeitschrift "Geomechanik und Tunnelbau" erschienen. Sie möchten die Zeitschrift näher kennenlernen? Dann bestellen Sie doch ein kostenloses Probeheft der aktuellen Ausgabe oder informieren sich über Inhalt, Preise und alles Weitere auf unserer Website. |