New Approaches in Civil Engineering

New Approaches in Civil Engineering

Investigating the Interaction Effects of Urban Tunnels

Document Type : Education

Authors
jalil hadi 1
mohamad keshavarz bakhshaesh 2
1 Ms.c. of Geotechnical Engineering, Department of Civil Engineering, Zanjan Branch, Islamic Azad University, Zanjan, Iran
2 Assistant Professor, Department of Basic Sciences, Payam Nour University, Zanjan Branch
10.30469/jnace.2024.424762.1099
Abstract
Population growth in most cities has increased the need to implement surface and subsurface infrastructure. Tunneling causes changes in surface and subsurface structures. On the other hand, the existence of structures also affect the displacements of the ground due to tunneling. Therefore, investigating and estimating the interaction between the tunnel and the surface structures, in terms of the effect that the presence of the surface structures has on the amount of settlement and displacements caused by tunneling, is of particular importance. In recent decades, researchers have conducted their studies focusing on various factors. In this article, an attempt has been made to investigate the influence of the parameter of the distance between the center of gravity of the structure and the tunnel diameter (X/D) on the settlement and displacement curves of the ground surface due to tunnel excavation. For this purpose, finite element numerical method (FEM) has been used. Based on the results of numerical modeling, the amount of settlement has been reduced by reducing the X/D ratio. Also, by reducing this ratio, the impact range of the settlement also decreases. Changes in the X/D ratio do not have much effect on the longitudinal settlement curve above the tunnel axis, but with the decrease of the X/D ratio below the center of gravity of the structure, the maximum longitudinal settlement increases. Also, by reducing the X/D ratio, the amount of horizontal displacements will increase.
Keywords
Soil-structure interaction
Interaction analysis methods
Seismic response

Subjects

1-Jan Nikolas Franzius, 2003, Behavior of building due to tunnel induced settlement, PHD thesis, Imperial College of Science, Technology and Medicine, 2003.
2-Augarde, C. E., Burd, H. J., & Houlsby, G. T., 2008, Some experience of modelling tunneling in soft ground using three-dimensional finite elements, of: 4th European, 603-612
3-Desari, G. R., Rawlings, C. G., & Bolton, M. D., Burd, H. J., Houlsby, G. T., Augarde, C. E., & Liu, G., 2000, Modelling tunnelling-induced settlement of masonry buildings. Proc. Instn. Civ. Engrs. Geotech. Engineering, 143, 17-29.
4-Desari, G. R., Rawlings, C. G., & Bolton, M. D., 1996, Numerical modelling of a NATM tunnel construction in London clay, Proc. of the International Symposium on Geotechnical Aspects of Underground Construction in Soft Ground. Balkema, Rotterdam, 491-496.
5-Dias, D., Kastner, R., & Maghazi, M., 2000, Three dimensional simulation of slurry shield in tunnelling, Proc. of the International Symposium on Geotechnical Aspects of Underground Construction in Soft Ground. Balkema, Rotterdam, 351-356.
6- Guedes, P. F. M., & Santos Pereira, C., 2000, The role of the soil K0 value in numerical analysis of shallow tunnels, Proc. of the International Symposium on Geotechnical Aspects of Underground Construction in Soft Ground. Balkema, Rotterdam, 379-384
7- Katzenbach, R., & Breth, H., 1981, Nonlinear 3d analysis for NATM in Frankfurt Clay, Proc. 10th Int. Conf. Soil Mech. and Found. Eng., vol. 1. Balkema Rotterdam, 315-318 .
8- Kimura, T., & Mair, R. J., 1981, Centrifugal testing of model tunnels in soft clay, Proc. 10th Int. Conf. Soil Mech. and Found. Eng., 319-322.
10- Lee, G. T. K., & Ng, C. W. W., 2002, Three-dimensional analysis of ground settlements due to tunnelling: Role of K0 and stiffness anisotropy, Proc. of the International Symposium on Geotechnical Aspects of Underground Construction in Soft Ground. Specifique, Lyon, 617-622.
11- Lee, K. M., & Rowe, R. K., 1991, An analysis of three-dimensional ground movements: the Thunder Bay tunnel, Canadian Geotechnical Journal, 28, 25-41.
12-Tang, D. K. W., Lee, K. M., & Ng , C. W. W., 2000, Stress paths around a 3 -D numerically simulated NATM tunnel in stiff clay, Proc. of the International Sym-posium on Geotechnical Aspects of Underground Construction in Soft Ground. Balkema, 443-449.
13-Vermeer, P. A., Bonnier, P. G., & MÄoller, S. C., 2002, On a smart use of 3D-FEM in tunnelling. Proceedings of the 8th international symposium on numerical models in geomechanics, NUMOG VIII. Balkema, Rotterdam, 361-366.
14- شریفزاده، م، کولیوند، ف، قربانی، م،2011، ارزیابی تأثیر هندسه و وزن ساختمان بر نشست سطح زمین ناشی ازتونلسازی مرحلهای با استفاده از روش عددی اجزاء محدود، مطالعه موردی پروژه تونل نیایش، نخستین همایش آسیایی و نهمین همایش ملی تونل، تهران
15- شرکت مهندسین مشاور عمران راهوار،2016، گزارش مطالعات ژئوتکنیک و مهندسی پی پروژه تونل صدر- نیایش.
16-R.B. J. Brinkgreve & P.A. Vermeer, 2001, PLAXIS 3D TUNNEL user manual, Tokyo, A.A. Balkema.                     
New Approaches in Civil Engineering
Volume 7, Issue 4
Winter 2024
Pages 43-52