Location
Chicago, Illinois
Date
02 May 2013, 4:00 pm - 6:00 pm
Abstract
Two separate deep-seated, creeping landslides exist in close proximity in a mountainous area with highly heterogeneous geological and geotechnical conditions. The ground movements are measured at a depth greater than 50m and affect 65m-high G4 embankment and 240m-long S3 tunnel that are under traffic since 2004. The first landslide affecting the embankment initiated shortly after completion of construction in an area where the highway was realigned after an old, pre-existing unstable area was identified during the design. Tunnel S3, about 300m to the east of embankment G4, suffered from slope instability during construction. This was successfully dealt with and the tunnel was completed without any further problems. Yet, a number of deep inclinometers that were installed to monitor post-construction performance revealed the presence of deep seated, creeping movements affecting the entire tunnel. Due to the curvature of the alignment, both slip surfaces daylight in the same area at the bottom of the valley downhill. The stabilization measures involve the construction of a single toe berm, approximately 700,000m3 in volume, which extends across the bottom of the valley and provides stabilization to both areas.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
7th Conference of the International Conference on Case Histories in Geotechnical Engineering
Publisher
Missouri University of Science and Technology
Document Version
Final Version
Rights
© 2013 Missouri University of Science and Technology, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Document Type
Article - Conference proceedings
File Type
text
Language
English
Recommended Citation
Houssiadas, Vassilis; Sakoumpenta, Eleni; and Haralambakis, Manolis, "Highway Section Affected by Two Neighboring Landslides – Performance, Monitoring and Design of Stabilization Measures" (2013). International Conference on Case Histories in Geotechnical Engineering. 70.
https://scholarsmine.mst.edu/icchge/7icchge/session03/70
Highway Section Affected by Two Neighboring Landslides – Performance, Monitoring and Design of Stabilization Measures
Chicago, Illinois
Two separate deep-seated, creeping landslides exist in close proximity in a mountainous area with highly heterogeneous geological and geotechnical conditions. The ground movements are measured at a depth greater than 50m and affect 65m-high G4 embankment and 240m-long S3 tunnel that are under traffic since 2004. The first landslide affecting the embankment initiated shortly after completion of construction in an area where the highway was realigned after an old, pre-existing unstable area was identified during the design. Tunnel S3, about 300m to the east of embankment G4, suffered from slope instability during construction. This was successfully dealt with and the tunnel was completed without any further problems. Yet, a number of deep inclinometers that were installed to monitor post-construction performance revealed the presence of deep seated, creeping movements affecting the entire tunnel. Due to the curvature of the alignment, both slip surfaces daylight in the same area at the bottom of the valley downhill. The stabilization measures involve the construction of a single toe berm, approximately 700,000m3 in volume, which extends across the bottom of the valley and provides stabilization to both areas.
