چکیده مقاله
The Steinhaldenfeld tunnel is located in the north eastern part of the city of Stuttgart, Germany The construction of this tunnel was carried out between the Hauptfriedhof and Steinhaldenfeld station, including two cut and cover parts of each 110 m length at the tunnel portals and a conventionally constructed part of 940 m length in between Several numerical studies have been performed to predict the magnitude of induced surface settlements Ref 4 , Ref 6 Throughout the studies some simplifying assumptions have accounted for modelling of tunnel installation procedures, like assuming a zone with increased cohesion around tunnel instead of modelling of rockbolts Thus, the reported results from numerical studies differ from what discovered in the field These differences consist of steepness of the settlement trough, which is more steeped in the case of discovered data, and the magnitude of settlements, which are smaller in the case of field data This research is focusing on how modelling of rockbolts in the numerical analysis can affect the induced surface settlements and the settlement trough shape Results indicate that the modelling using rockbolts instead of grouting zone yields more accurate surface settlements with regard to the discovered data in the field However, both modelling cases supply wider settlement troughs with less inclined shape relative to the settlement trough in the field, which means they do not provide conservative results for risk assessment of surface structures
کلیدواژهها
نویسندگان
Reza Ziaie Moayed
Assistant Professor, Civil Engineering Department, Imam Khomeini International University, Qazvin, Iran
Ehsan Izadi
Research Assistant, Civil Engineering Department, Imam Khomeini International University, Qazvin, Iran
Mehrad Mirsepahi³
Research Assistant, Geotechnical Engineering Department, Islamic Azad University Science and Research Hamedan Branch, Iran
شیوه ارجاع
Ziaie Moayed, Reza and Izadi, Ehsan and Mirsepahi³, Mehrad,1390,Effect of accounting rockbolts in the numerical analysis on the surface settlements of Steinhaldenfeld tunnel,09th Iranian Tunneling Conference,Tehran
ارائهشده در
مجموعه مقالات نهمین همایش ملی تونل10 آبان 1390 · تهران