Evaluation of Building Displacement Induced By EPB Tunneling Through GPS-GNSS Monitoring System and Back Analysis Technique (Tabriz Subway Twin Tunnels)
Downloads
One of the main aspects of tunneling in urban areas is controlling the amount of settlement that might cause some damage to the structures and infrastructures. In this paper, the novel displacement monitoring system called Global Positioning System - Global Navigation Satellite System (GPS-GNSS) has been applied to monitor the building displacement .One of the most important features of this approach is that this system provides three dimensional displacement behavior of the building. Besides, in order to fulfill the purpose of accuracy, the amount of settlement induced by Earth Pressure Balance (EPB) tunneling was calculated by numerical, empirical and analytical methods. In order to achieve this purpose, the back analysis technique was considered. The order in which the geotechnical parameters are optimized depends on the amount of sensitivity function. That is, the parameter of high sensitivity function is optimized first. According to the calculations, the sensitivity analysis results show that the maximum amount of sensitivity function with the volume loss of more than 1% in respect to the internal friction angle is about 0.5, which is greater than other geotechnical properties. According to the results of back analysis technique, the optimized geotechnical properties were elastic modulus (), internal friction angle () and cohesion () found on the volume loss of 1.5% with less than 0.02% error. The maximum settlement of the building at the studied area, explored by the optimized numerical method, is about 4 mm, which is in the range of monitored data (3mm-13mm) obtained through GPS-GNSS procedure.
[2] Park, Kyung-Ho. "Analytical solution for tunnelling-induced ground movement in clays." Tunnelling and Underground Space Technology 20, no. 3 (2005): 249-261.
[3] Möller, S. C., and P. A. Vermeer. "On numerical simulation of tunnel installation." Tunnelling and Underground Space Technology 23, no. 4 (2008): 461-475.
[4] Strokova, L. A. "Methods of estimating surface settlement during driving of urban tunnels." Soil Mechanics and Foundation Engineering 47, no. 3 (2010): 92-95.
[5] Shimizu, N., S. Tayama, H. Hirano, and T. Iwasaki. "Monitoring the ground stability of highway tunnels constructed in a landslide area using a web-based GPS displacement monitoring system." Tunnelling and Underground Space Technology 21, no. 3 (2006): 266-267.
[6] Shin, H. S., C. Y. Kim, K. Y. Kim, BJ BAE, and S. W. Hong. "A new strategy for monitoring of adjacent structures to tunnel construction in urban area." Tunnelling and Underground Space Technology 21, no. 3-4 (2006).
[7] Yoo, Chungsik, and Jae-Hoon Kim. "A web-based tunneling-induced building/utility damage assessment system: TURISK." Tunnelling and Underground Space Technology 18, no. 5 (2003): 497-511.
[8] Ghorbani, Masoud, and Mostafa Sharifzadeh. "Long term stability assessment of Siah Bisheh powerhouse cavern based on displacement back analysis method." Tunnelling and Underground Space Technology 24, no. 5 (2009): 574-583.
[9] Davarpanah, M., 2011. Assessment of the effect of full face excavation of the Tabriz subway tunnels on adjacent structures. M.Sc. thesis, P. 105-125. Sahand University of Technology, Tabriz, Iran (Farsi).
[10] GNSS Solution, Refeeence Manual. 2005, p.45-98
[11] Jeon, Y. S., and H. S. Yang. "Development of a back analysis algorithm using FLAC." International Journal of Rock Mechanics and Mining Sciences 41 (2004): 447-453.
[12] Fakhimi, A., D. Salehi, and N. Mojtabai. "Numerical back analysis for estimation of soil parameters in the Resalat Tunnel project." Tunnelling and Underground Space Technology 19, no. 1 (2004): 57-67.
[13] Franzius, J.N.,"¬Behavior of building due to tunnel induced settlement", PHD thesis, Imperial College of Science,Technology and Medicine, 2003,p149-164
[14] den Hertog, R. W. "Boring Esfahan's North-South line: An assessment of the influence on the adjacent structures due to tunnelling underneath the Chahar Bagh Abbasi street in Esfahan, Iran." PhD diss., TU Delft, Delft University of Technology, 2005.
[15] Ocak, Ibrahim. "Environmental effects of tunnel excavation in soft and shallow ground with EPBM: the case of Istanbul." Environmental Earth Sciences 59, no. 2 (2009): 347-352.
[16] Zhu, W., Zhao, J., Stability Analysis and Modelling of Underground Excavations in Fractured Rocks. ELSEVIER GEO-ENGINEERING BOOK SERIES, 2004. p.67-74
[17] Chi, Shue-Yeong, Jin-Ching Chern, and Chin-Cheng Lin. "Optimized back-analysis for tunneling-induced ground movement using equivalent ground loss model." Tunnelling and Underground Space Technology 16, no. 3 (2001): 159-165.
[18] Vittorio, ¬G., Mechanized tunnelling in urban areas:Design methodology & construction control, Taylor and Francis Group 2007,p.113-150
[19] Leca, Eric, and Barry New. "Settlements induced by tunneling in soft ground." Tunnelling and Underground Space Technology 22, no. 2 (2007): 119-149.
[20] Mahmutoğlu, Yılmaz. "Surface subsidence induced by twin subway tunnelling in soft ground conditions in Istanbul." Bulletin of engineering geology and the environment 70, no. 1 (2011): 115-131.
[21] Migliazza, M., M. Chiorboli, and G. P. Giani. "Comparison of analytical method, 3D finite element model with experimental subsidence measurements resulting from the extension of the Milan underground." Computers and Geotechnics 36, no. 1 (2009): 113-124.
- authors retain all copyrights - authors will not be forced to sign any copyright transfer agreements
- permission of re-useThis work (including HTML and PDF Files) is licensed under a Creative Commons Attribution 4.0 International License.
