The monitoring of the settlement of the shield tunnel plays a very important role in the traffic safety of metro trains. The monitor precision and the timely are required for the settlement of the shield tunnel. The automated monitoring must be introduced to the monitoring work, and becomes powerful monitoring method. The article introduced the measurement principle of the hydrostatic leveling system (HLS), through the hydrostatic leveling system preliminary utilized in metro monitoring for construction deep excavation above shield tunnel. The monitoring data and the construction safety are analyzed. Regularities of settlement of the shield tunnel are summarized. Suggestion is made on the monitoring range.
In this paper, the blast vibration was monitored and the data from an underground engineering were analyzed. The empirical formula of the relation between the maximum vertical direction vibration velocity and the scaled explosive charge, the maximum horizontal radius direction vibration velocity and the scaled explosive charge, the maximum horizontal tangential direction vibration velocity and the scaled explosive charge were determined. According to the blasting safety regulations, the safety standard of the blasting vibration velocity is less than 7.0 cm/s. Through monitoring and inspection, the safety evaluation of the secondary lining of the highway tunnel was made. The safety evaluation of the protected highway tunnel is safety under the blasting vibration.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.