CONSTRUCTION CONTROL TECHNOLOGY OF SHIELD TUNNEL IN UPPER SOFT AND LOWER HARD STRATUM
Combining with specific engineering examples,theoretical analysis method is applied to solve the prob-lems encountered in shield construction in upper-soft and lower-hard stratum,the rationality of construction mea-sures is verified by analyzing tunneling parameters such as soil tank pressure,thrust,cutter head speed and tunnel-ing speed.We propose a construction control method featuring full soil tank,small thrust,low cutter head speed,and slow shield tunneling,by which the requirements of the surface subsidence specification are satisfied.The paper may provide the reference for shield tunnel construction in similar strata.
upper-soft and lower-hard stratumshield tunneltunneling parameterssurface subsidence