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Abstract According to the forked engineering of Miaoya tunnel along Shanghai—Fuzhou expressway，the contents，technique and method of monitoring in shallow-buried large-span section of Miaoya forked tunnel are presented. Based on the measured data inside and outside the tunnel，such as the bolt axial force，concrete lining stress，ground vibration velocity and so on，the deformation and stress properties of surrounding rocks and supporting system are analyzed in addition to the blasting dynamic characteristics of ground. The in-time information is applied to guide tunnel construction and optimize the supporting system；and monitoring results are discussed in detail. The presented experience and data can provide references to the design，construction and research of similar tunnel engineering.
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Received: 18 April 2007
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