Spatial effects in tunnelling through squeezing ground

Preface
Vorwort
Acknowledgments
Summary
Zusammenfassung
Table of contents
Introduction

Part I: The effect of the stress path on squeezing behaviour in tunnelling

1 Introduction
2 Problem layout and solution method
3 Deviation from the plane strain response
4 Limitations of the convergence-confinement method
5 Stress and deformation history and its effect on ground response
6 Conclusions

Appendix of Part I
References

Part II: The interaction between yielding supports and squeezing ground

1 Introduction
2 The influence of the stress path on ground-support interaction
3 The influence of yield pressure and yield deformation
4 Design nomograms
5 Application examples
6 Closing remarks

References

Part III: On a paradox of elasto-plastic tunnel analysis

1 Introduction
2 Unexpected model behaviour
3 Reasons for the discrepancy between model and reality
4 Effect of creep
5 Effect of face reinforcement
6 Effect of yielding support
7 Effect of the low stiffness of green shotcrete
8 Effect of the overcut in shield tunnelling
9 Conclusions

Appendix A of Part III
Appendix B of Part III
References

Part IV: On the variability of squeezing in tunnelling

1 Introduction
2 The sensitivity of ground response
3 Heterogeneous rock structures
4 Conclusions

Acknowledgements
References

Part V: Interpretation of core extrusion measurements in tunnelling through squeezing ground

1 Introduction
2 Computational methods for estimating extrusion
3 Extrusion measurements
4 Theoretical aspects
5 Gotthard Base Tunnel
6 Conclusions

Acknowledgments
References
Conclusions and Outlook