Research on the Standard of Protection Level Division for Integrated Structure Design of Roof and Cave of Bridge to Prevent Dangerous Rock Fall
Based on the safety requirements of railway engineering construction and operation,especially the actual situation of dangerous rock fall in the mountainous areas of central and western China,the application status of flexible and rigid hangar tunnel protection against dangerous rock fall is analyzed at home and abroad,and the protection level ranges of protection methods under different structural types of protection net,open cut tunnel and hangar tunnel are compared,and the actual design energy level indexes of typical hangar tunnel in China is sorted out.Based on the characteristics of the integrated structure of bridge shed and tunnel,the common calculated rock falling protection level and the economic comparison of the amount of steel bar and concrete used in the main beam and tunnel of 200kJ,500 kJ and 1000 kJ protection levels,the paper puts forward the standard suggestion for the design of protection level of the integrated structure of bridge shed and tunnel for preventing dangerous rock fall in railway engineering in China.
safetydangerous rocks fallintegrated structure of bridge shed and tunnelstandardprotection level
NETL
NSTL
万方数据
维普
