ABSTRACT
The health monitoring plays an important role in maintenance of shield tunnels. It employs in-situ, continuous or regular (routine) measurements and analyses of key structural and environmental parameters under the operating conditions to provide warning of impending abnormal states or accidents to avoid casualties and to inform maintenance and rehabilitation decisions[1]. To date, health monitoring has been implemented in a number of shield tunnels in China[2,3]. Although remarkable progress has been made in sensing technology and system integrity in health monitoring, fine analysis on the mass measurements for tunnel state evaluation still remains a real challenge.
