APPLICATION OF STATIC LEVELING SYSTEM IN EXISTING SUBWAY TUNNEL MONITORING
This study introduces and analyzes the principle,advantages,installation,debugging,data acquisi-tion and analysis of static leveling monitoring system and the influencing factors of static leveling monitoring accu-racy in existing subway tunnels.Combined with the monitoring example of static leveling system in existing metro tunnel section during the foundation pit construction of a project,the reliability of static leveling system is verified by comparing with manual monitoring data.At the same time,the influence of train running on the measurement results is discussed by comparing the measuring accuracy of the static level when the train is at rest and when it is running.It is found that the automatic monitoring system of static level can fully meet the accuracy requirements of real-time monitoring of tunnel deformation during the operation of urban subway,which shows a strong practical value.By comparing the data obtained by static level and the data measured manually,it can be seen that the moni-toring results of the two are basically consistent,and the determination of deformation is highly consistent.For en-gineering monitoring with higher precision,it is more reliable to select the monitoring value after train shutdown as the monitoring value on the same day.
NETL
NSTL
万方数据
