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Abstract Based on the transmission water tunnel in the Tai¢an pumped-storage power station，the construction technique about blasting stabilization as tunnel crosses the Beijing—Shanghai Railway is studied，combining with the current study results and codes. The research intends to ensure the construction safety of the tunnel on the stocks and keep the minimum damage to the near railway. According to the modern information construction theory，the field monitoring technique is used to obtain the blasting vibration velocity during the first phase. And then the regression analysis is carried out using the monitoring data. Based on the regression analysis，the blasting parameters of the latter phase are optimised and applied during the field construction of the second phase. The final monitoring result indicates that the operation of the railway is not influenced by the construction of tunnels obviously. At the same time，the numerical simulation is employed and the variable rule about the vertical vibration velocity with time is received through the simulation. The largest blasting velocity of the surface near the embankment obtained by the numerical simulation can be proved to be accordance with the criterion，which validates that this kind of control technique about blasting stabilization is reasonable and ensure the safety of the tunnel construction and railway management. The problem about new tunnel crossing neighbouring railway is solved，which offers the theoretical and methodological experiences to the similar engineering.
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Received: 18 April 2007
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