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:: Volume 10, Issue 3 (Vol. 10, No. 3 Autumn2016 2017) ::
2017, 10(3): 3559-3586 Back to browse issues page
Effect of Engineering Geological Factors on the Parameters Associated with the Empirical Study of Ground Settlement due to Excavation of Abuzar Tunnel, Tehran
M. R Baghban Golpasand *1, M. R Nikudel, A Uromeihy
1- دانشگاه تربیت مدرس، دانشکده علوم، گروه زمین شناسی مهندسی , mr.baghbangolpasand@modares.ac.ir
Abstract:   (4494 Views)

Ground settlement due to tunneling and the effects of the engineering geological factors on its dimensions and extensions, is a very important problem in shallow tunnel excavation projects in urban areas. Empirical method is one of the usual methods to study this subject. The empirical and dimension-less parameters of VL and k are the most important parameters in relation to this method that are estimated according to engineering geological factors. In this research, the values of these parameters were initially estimated based on preceding studies and the ground settlement was predicted using these estimated values of VL and k. In next stage, the results of predictions were compared with the real (measured) settlements happened due to Abuzar tunnel excavation. As the real settlements are less than the predicted ones, it was concluded that the real VL must be lower than the predicted values or the real k must be higher than the predicted values. With regard to the high dependency of these parameters to the soil cohesion, it seems natural cementation of Tehran alluvia has acted as a factor to increase the soil cohesion and has caused to decrease ground settlement due to excavation of Abuzar tunnel. For validation of this hypothesis, preceding findings about alluvia cementation were reviewed and the results of in-situ and laboratory shear and triaxial tests were compared with together. Then it is concluded that the higher cohesions of in-situ shear tests are occurred due to natural cementation of materials existing in Abuzar tunnel route

Keywords: Ground Settlement, Mechanized Tunnelling, Empirical Parameters of VL & k, Abuzar
Full-Text [PDF 1648 kb]   (2928 Downloads)    
Type of Study: Research Paper | Subject: Geotecnic
Received: 2016/12/20 | Accepted: 2016/12/20 | Published: 2016/12/20
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Baghban Golpasand M R, Nikudel M R, Uromeihy A. Effect of Engineering Geological Factors on the Parameters Associated with the Empirical Study of Ground Settlement due to Excavation of Abuzar Tunnel, Tehran. Journal of Engineering Geology. 2017; 10 (3) :3559-3586
URL: http://jeg.khu.ac.ir/article-1-2590-en.html


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Volume 10, Issue 3 (Vol. 10, No. 3 Autumn2016 2017) Back to browse issues page
نشریه زمین شناسی مهندسی Journal of Engineering Geology
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