Risk analysis and emergency measures for shallow tunnel construction embedded in watery and arenaceous stratum

Aiming at the shotcrete cracking danger that happened on shallow tunnel construction of Shenzhen Metro, this paper analyses the major predisposing factors and their interaction for dangers occurred at shallow tunnel construction, which embedded in watery and arenaceous stratum. We put forward the corresponding measures based on the actual situation. According to the monitoring date, we make regression analysis using MATLAB, and evaluate the effectiveness of measures. The research result shows that, controlling the loss of groundwater is the key to avoid this kind of accident.