TY - GEN
T1 - Construction monitoring for the transbay transit center excavation in san francisco, California
AU - Hashash, Youssef M.A.
AU - Jammoul, Mohamad
AU - Fleming, Kaitlyn L.
AU - McLandrich, Stephen
AU - Yeskoo, Andrew
AU - O'Riordan, Nick
AU - Gouvin, Pierre
AU - Riemer, Michael
N1 - Publisher Copyright:
© ASCE 2015.
PY - 2015
Y1 - 2015
N2 - Underground space development in large metropolitan areas has become a way to accommodate rapid population growth while sustaining and enhancing the quality of urban lifestyle. A common challenge to urban underground construction is in developing such a space in a heavily built environment with minimal impact on adjacent structures and limited disruption to economic activity. This challenge is exacerbated when soft-to-medium soil conditions are encountered. Hence, urban deep excavations are usually coupled with extensive instrumentation plans and continuous monitoring to evaluate performance and detect deviations from anticipated behavior. The massive transbay transit center (TTC) excavation in San Francisco is a unique excavation of unprecedented scale in soft soils characteristic to the Bay Area. It is approximately 1500 ft long, 85 ft wide, and 60 ft deep. Novel technologies were employed to support and enhance the construction control process and monitor ground deformations. This paper will highlight the key features of the field instrumentation program used for the TTC project along with a description of the developed and installed sensors. In addition, it will discuss the data storage and monitoring methods, including the display of construction progress and ground and building movements in a virtual reality environment. The evaluation of ground response to excavation activities will be the subject of future publications.
AB - Underground space development in large metropolitan areas has become a way to accommodate rapid population growth while sustaining and enhancing the quality of urban lifestyle. A common challenge to urban underground construction is in developing such a space in a heavily built environment with minimal impact on adjacent structures and limited disruption to economic activity. This challenge is exacerbated when soft-to-medium soil conditions are encountered. Hence, urban deep excavations are usually coupled with extensive instrumentation plans and continuous monitoring to evaluate performance and detect deviations from anticipated behavior. The massive transbay transit center (TTC) excavation in San Francisco is a unique excavation of unprecedented scale in soft soils characteristic to the Bay Area. It is approximately 1500 ft long, 85 ft wide, and 60 ft deep. Novel technologies were employed to support and enhance the construction control process and monitor ground deformations. This paper will highlight the key features of the field instrumentation program used for the TTC project along with a description of the developed and installed sensors. In addition, it will discuss the data storage and monitoring methods, including the display of construction progress and ground and building movements in a virtual reality environment. The evaluation of ground response to excavation activities will be the subject of future publications.
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U2 - 10.1061/9780784479087.232
DO - 10.1061/9780784479087.232
M3 - Conference contribution
AN - SCOPUS:84925060910
T3 - Geotechnical Special Publication
SP - 2502
EP - 2511
BT - IFCEE 2015 - Proceedings of the International Foundations Congress and Equipment Expo 2015
A2 - Anderson, J. Brian
A2 - Iskander, Magued
A2 - Suleiman, Muhannad T.
A2 - Laefer, Debra F.
PB - American Society of Civil Engineers
T2 - International Foundations Congress and Equipment Expo 2015, IFCEE 2015
Y2 - 17 March 2015 through 21 March 2015
ER -