Geological and geotechnical observations from the Niagara Tunnel Project

Perras, Matthew A.; Diederichs, Mark S.; Besaw, David

doi:10.1007/s10064-014-0633-5

Cited by 9 publications

(1 citation statement)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…e result shows that when the tunnel axial is parallel to the maximum horizontal stress, the tunnel displacement of the key points is the smallest, which is beneficial to the stability of the surrounding rock. When the tunnel axial is perpendicular to the maximum horizontal stress, the tunnel displacement of the two sides and the top and bottom plates is the largest [32,33]. e literature proves that when the angle between the tunnel axial and maximum horizontal stress ranges from 25°to 30°, the effect on stability of the tunnel is not evident [34].…”

Section: Influence Of Tectonic Stress Direction On Tunnel Stabilitymentioning

confidence: 99%

Study on the Influence of Tectonic Stress on Stability of Horseshoe‐Shaped Tunnels

Wang

Qiu

et al. 2021

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

While the tunnel is in the high tectonic stress environment and surrounding rock of tunnel has the characteristics of soft texture and stronger expansion, the preference of tunnel shape is horseshoe. An elastic-plastic model is analyzed by complex function theory in accordance with the deformation characteristics of a horseshoe-shaped tunnel in an engineering site. The numerical model of the tunnel is built by FLAC3D, and the influence of the magnitude and direction of structural stress on the horseshoe-shaped tunnel is studied in detail. Finally, the security support of the tunnel is discussed. Results show that the stress concentration phenomenon is easily focused on the left, right, and bottom sides of the tunnel; these places should therefore be the focus of attention of tunnel stability analysis. The magnitude and direction of tectonic stress greatly affect the stability of the horseshoe-shaped tunnel. Similarly, the magnitude of tectonic stress can significantly affect the deformation state of the tunnel. The direction of tectonic stress mainly reflects the orientation of the tunnel. In addition, the orientation of the tunnel should be arranged along the maximum direction of principal stress.

show abstract

Section: Influence Of Tectonic Stress Direction On Tunnel Stabilitymentioning

confidence: 99%