Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Experimental and numerical investigations on cross rock pillar method for super large cross-sectional tunnel excavation
Abstract To solve stability issues of super large cross-sectional tunnel with greater than 20 m across and an overall area greater than 314 $ m^{2} $ during excavation, a new technique named cross rock pillar method (CRPM) is proposed. A physical model test was firstly conducted to investigate the deformation and failure mechanisms of a tunnel using CRPM. In this physical model, a rock-like material simulating the V-class surrounding rock was made and a geomechanical model test bench was developed to simulate and observe the progressive failure process of the tunnel. Furthermore, fiber sensing technology was used to continuously monitor the horizontal strain in different cross sections. Test results show that the cross rock pillars play a significant role in preventing deformation of the surrounding rock during the tunnel excavation. A numerical model was then established to verify the results obtained by the physical model test. The deformation and stability mechanisms of the surrounding rock are determined using CRPM in super large cross-sectional tunnels. Finally, the proposed CRPM was successfully implemented in the Hongqihegou rail station, and the monitoring results show that the surrounding rock was adequately controlled throughout the excavation process.
Experimental and numerical investigations on cross rock pillar method for super large cross-sectional tunnel excavation
Abstract To solve stability issues of super large cross-sectional tunnel with greater than 20 m across and an overall area greater than 314 $ m^{2} $ during excavation, a new technique named cross rock pillar method (CRPM) is proposed. A physical model test was firstly conducted to investigate the deformation and failure mechanisms of a tunnel using CRPM. In this physical model, a rock-like material simulating the V-class surrounding rock was made and a geomechanical model test bench was developed to simulate and observe the progressive failure process of the tunnel. Furthermore, fiber sensing technology was used to continuously monitor the horizontal strain in different cross sections. Test results show that the cross rock pillars play a significant role in preventing deformation of the surrounding rock during the tunnel excavation. A numerical model was then established to verify the results obtained by the physical model test. The deformation and stability mechanisms of the surrounding rock are determined using CRPM in super large cross-sectional tunnels. Finally, the proposed CRPM was successfully implemented in the Hongqihegou rail station, and the monitoring results show that the surrounding rock was adequately controlled throughout the excavation process.
Experimental and numerical investigations on cross rock pillar method for super large cross-sectional tunnel excavation
Sang, Haomin (Autor:in) / Liu, Bin (Autor:in) / Kang, Yongshui (Autor:in) / Liu, Quansheng (Autor:in) / Pan, Yucong (Autor:in) / Zhou, Annan (Autor:in)
2023
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
BKL:
56.00$jBauwesen: Allgemeines
/
38.58
Geomechanik
/
38.58$jGeomechanik
/
56.20
Ingenieurgeologie, Bodenmechanik
/
56.00
Bauwesen: Allgemeines
/
56.20$jIngenieurgeologie$jBodenmechanik
RVK:
ELIB18
| Trans Tech Publications | 2011
| British Library Conference Proceedings | 2011
The Simulation Analysis of Large Cross-Section Soft Rock Tunnel Excavation under the Bias Terrain
| Trans Tech Publications | 2011
The Simulation Analysis of Large Cross-Section Soft Rock Tunnel Excavation under the Bias Terrain
| British Library Conference Proceedings | 2011