The tunnel Progon is being constructed as a part of Corridor 10 highway project about 5 km north from the border crossing with Bulgaria in southern Serbia. During the design process 2D finite element analysis was utilized with the objective to investigate an influence of different support systems on the convergence across an excavation. Two models were used in calculations. The first model is elastic perfectly-plastic with constant stiffness independent of the stress level. The second model assumes hyperbolic relationship between the deviatoric stress and axial strain and stress dependent stiffness. This model also accounts for small strain stiffness of soil. In order to allow for a certain convergence across an excavation the load reduction method was utilized. Convergence monitoring is currently ongoing for the excavated portion of approx. 700 m of the tunnel exit portal. The measurements show cumulative displacements in the range of 1-3 cm. Results obtained by the analyses prior to ...the tunnel construction are in good agreement with the measurements. Convergence is approx. 5 cm when MC model is used and around 1 cm in the case of HS-small model, thus limiting the measurement results from the lower and upper bound.
TY - CONF
AU - Berisavljević, Zoran
AU - Milenković, Svetozar
AU - Berisavljević, Dusan
AU - Šušić, Nenad
PY - 2015
UR - http://rims.institutims.rs/handle/123456789/284
AB - The tunnel Progon is being constructed as a part of Corridor 10 highway project about 5 km north from the border crossing with Bulgaria in southern Serbia. During the design process 2D finite element analysis was utilized with the objective to investigate an influence of different support systems on the convergence across an excavation. Two models were used in calculations. The first model is elastic perfectly-plastic with constant stiffness independent of the stress level. The second model assumes hyperbolic relationship between the deviatoric stress and axial strain and stress dependent stiffness. This model also accounts for small strain stiffness of soil. In order to allow for a certain convergence across an excavation the load reduction method was utilized. Convergence monitoring is currently ongoing for the excavated portion of approx. 700 m of the tunnel exit portal. The measurements show cumulative displacements in the range of 1-3 cm. Results obtained by the analyses prior to the tunnel construction are in good agreement with the measurements. Convergence is approx. 5 cm when MC model is used and around 1 cm in the case of HS-small model, thus limiting the measurement results from the lower and upper bound.
PB - Springer Int Publishing Ag, Cham
C3 - Engineering Geology for Society and Territory, Vol 6: Applied Geology for Major Engineering Projects
T1 - Convergence Predictions and Primary Support Optimization of the Tunnel Progon
EP - 328
SP - 323
DO - 10.1007/978-3-319-09060-3_55
ER -
@conference{
author = "Berisavljević, Zoran and Milenković, Svetozar and Berisavljević, Dusan and Šušić, Nenad",
year = "2015",
abstract = "The tunnel Progon is being constructed as a part of Corridor 10 highway project about 5 km north from the border crossing with Bulgaria in southern Serbia. During the design process 2D finite element analysis was utilized with the objective to investigate an influence of different support systems on the convergence across an excavation. Two models were used in calculations. The first model is elastic perfectly-plastic with constant stiffness independent of the stress level. The second model assumes hyperbolic relationship between the deviatoric stress and axial strain and stress dependent stiffness. This model also accounts for small strain stiffness of soil. In order to allow for a certain convergence across an excavation the load reduction method was utilized. Convergence monitoring is currently ongoing for the excavated portion of approx. 700 m of the tunnel exit portal. The measurements show cumulative displacements in the range of 1-3 cm. Results obtained by the analyses prior to the tunnel construction are in good agreement with the measurements. Convergence is approx. 5 cm when MC model is used and around 1 cm in the case of HS-small model, thus limiting the measurement results from the lower and upper bound.",
publisher = "Springer Int Publishing Ag, Cham",
journal = "Engineering Geology for Society and Territory, Vol 6: Applied Geology for Major Engineering Projects",
title = "Convergence Predictions and Primary Support Optimization of the Tunnel Progon",
pages = "328-323",
doi = "10.1007/978-3-319-09060-3_55"
}
Berisavljević, Z., Milenković, S., Berisavljević, D.,& Šušić, N.. (2015). Convergence Predictions and Primary Support Optimization of the Tunnel Progon. in Engineering Geology for Society and Territory, Vol 6: Applied Geology for Major Engineering Projects
Springer Int Publishing Ag, Cham., 323-328.
https://doi.org/10.1007/978-3-319-09060-3_55
Berisavljević Z, Milenković S, Berisavljević D, Šušić N. Convergence Predictions and Primary Support Optimization of the Tunnel Progon. in Engineering Geology for Society and Territory, Vol 6: Applied Geology for Major Engineering Projects. 2015;:323-328.
doi:10.1007/978-3-319-09060-3_55 .
Berisavljević, Zoran, Milenković, Svetozar, Berisavljević, Dusan, Šušić, Nenad, "Convergence Predictions and Primary Support Optimization of the Tunnel Progon" in Engineering Geology for Society and Territory, Vol 6: Applied Geology for Major Engineering Projects (2015):323-328,
https://doi.org/10.1007/978-3-319-09060-3_55 . .
