A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Monitoring of Los Angeles Metro Red Line Subway: Earthquake Response Adjacent to Deep Excavation
The Los Angeles Metro Red Line subway tunnels in Los Angeles, California, are important transportation lifelines and are currently operating adjacent to the Wilshire Grand redevelopment project. The construction of the basement and foundation of the new 73-story tower required excavation between 57 to 93 feet (17 to 28 m) deep. Adjacent to the subway tunnels, shoring is needed within about 6 to 10 feet (1.8 to 3.0 m) horizontally from the tunnels. Monitoring was performed during construction of the Wilshire Grand project, such as monitoring of the shoring and the subway tunnel, including vibration monitoring on the interior of the closest Red Line tunnel. The moment magnitude 5.1 La Habra earthquake of March 28, 2014 was recorded by the tunnel vibration monitoring sensors as well as California Strong Motion Instrumentation Program (CSMIP) strong-motion accelerometers in the basements of nearby buildings. The accelerations within the tunnel and those in the basements of the nearby buildings are compared. Earthquake acceleration records along a length of a buried lifeline facility such as a subway tunnel are not common and provide an opportunity to evaluate relative earthquake response between different tunnel locations and adjacent structures.
Monitoring of Los Angeles Metro Red Line Subway: Earthquake Response Adjacent to Deep Excavation
The Los Angeles Metro Red Line subway tunnels in Los Angeles, California, are important transportation lifelines and are currently operating adjacent to the Wilshire Grand redevelopment project. The construction of the basement and foundation of the new 73-story tower required excavation between 57 to 93 feet (17 to 28 m) deep. Adjacent to the subway tunnels, shoring is needed within about 6 to 10 feet (1.8 to 3.0 m) horizontally from the tunnels. Monitoring was performed during construction of the Wilshire Grand project, such as monitoring of the shoring and the subway tunnel, including vibration monitoring on the interior of the closest Red Line tunnel. The moment magnitude 5.1 La Habra earthquake of March 28, 2014 was recorded by the tunnel vibration monitoring sensors as well as California Strong Motion Instrumentation Program (CSMIP) strong-motion accelerometers in the basements of nearby buildings. The accelerations within the tunnel and those in the basements of the nearby buildings are compared. Earthquake acceleration records along a length of a buried lifeline facility such as a subway tunnel are not common and provide an opportunity to evaluate relative earthquake response between different tunnel locations and adjacent structures.
Monitoring of Los Angeles Metro Red Line Subway: Earthquake Response Adjacent to Deep Excavation
Hudson, Martin B. (author) / Lew, Marshall (author)
Seventh China-Japan-US Trilateral Symposium on Lifeline Earthquake Engineering ; 2016 ; Shanghai, China
2017-08-10
Conference paper
Electronic Resource
English
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