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Design of a Structure Health Monitoring System for Shield Tunnels and Some Key Issues
(1 State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092; 2 Key Laboratory of Geotechnical and Underground Engineering of the Ministry of Education, Tongji University, Shanghai 200092; 3 Department of eotechnical Engineering, College of Civil Engineering, Tongji University, Shanghai 200092; 4 Shanghai Tunnel Engineering & Rail Transit Design and Research Institute, Shanghai 200235)
Abstract The operation of shield tunnels typically lasts for 50~100 years. Recently, the Structural Health Monitor?
ing System (SHMS) for shield tunnels has received much attention with more and more river-crossing deep-buried large-diameter long-distance shield tunnels being built in China. Based on a comprehensive review of the current SHMS for tunnels, and considering the design characteristics of shield tunnels, a clear definition is put forward for a Shield Tunnel SHMS (STSHMS). A STSHMS is a data acquisition, management and analysis system for shield tunnels, which uses long-term monitoring techniques, data analysis and mechanical analysis, with the aims to verify key design parameters and index, assess and evaluate structure performance and provide a basis for allocating Maintenance and Rehabilitation (M&R) resources. The STSHMS comprises three subsystems, i.e., a data acquisitiontransmission-storage subsystem, a data integration- visualization-warning subsystem, and a data analysis-assessment subsystem. The main contents and design approach of each sub-system are introduced, with a discussion of key issues of determination of monitoring items and locations, sensor selection, data integration, visualization, development of health assessment methods and the relationship with M&R, as well as the engineering practice of developing STSHMS in the Shanghai Yangtze River Tunnel Project. Finally, some concrete suggestions are provided for the design and implementation of STSHMS.
Abstract：
The operation of shield tunnels typically lasts for 50~100 years. Recently, the Structural Health Monitor?
ing System (SHMS) for shield tunnels has received much attention with more and more river-crossing deep-buried large-diameter long-distance shield tunnels being built in China. Based on a comprehensive review of the current SHMS for tunnels, and considering the design characteristics of shield tunnels, a clear definition is put forward for a Shield Tunnel SHMS (STSHMS). A STSHMS is a data acquisition, management and analysis system for shield tunnels, which uses long-term monitoring techniques, data analysis and mechanical analysis, with the aims to verify key design parameters and index, assess and evaluate structure performance and provide a basis for allocating Maintenance and Rehabilitation (M&R) resources. The STSHMS comprises three subsystems, i.e., a data acquisitiontransmission-storage subsystem, a data integration- visualization-warning subsystem, and a data analysis-assessment subsystem. The main contents and design approach of each sub-system are introduced, with a discussion of key issues of determination of monitoring items and locations, sensor selection, data integration, visualization, development of health assessment methods and the relationship with M&R, as well as the engineering practice of developing STSHMS in the Shanghai Yangtze River Tunnel Project. Finally, some concrete suggestions are provided for the design and implementation of STSHMS.
LI Xiao-Jun- 1,
2 ,
3 Hong-Bi-Chen- 3 Yang-Zhi-Hao- 4
.Design of a Structure Health Monitoring System for Shield Tunnels and Some Key Issues[J] MODERN TUNNELLING TECHNOLOGY, 2017,V54(1): 17-23
2017, Vol. 54 