Study On The Construction Of Shield Tunneling Under The Airport Apron

This mass of paper expounds the real reason of deformation of shields driving under airport parking apron that a metro line runs under a airport,from all aspects of strata settlement theory,engineering numerical simulation,and monitoring and measurement results.In addition,the coordinative control method is illustrated against the construction process.First, this thesis elaborated the application of shield method at home and abroad, research methods on the strata displacement,and correlational study on the ground displacement that shield method is applicated.Secondly,this paper holds that it is of great significance that the selection of earth pressure balance shield machine for a particular soil condition in certain tunnel construction.Based on an engineering example,this paper probes into the specified conditions and actual respects of Komatsu mudding-type earth pressure balance shield machine used in the corresponding soil, in terms of the type-selection of shield machine.Thirdly,under the background of shield mechine driving under airport parking apron which is assentive to deformation in Tianjin metro line2airport extension project,this paper makes some study on strata and surface deformation in accordance with the methods of numerical simulation and monitoring measurement,analyzing the subsidence control effect at its complication stage,reveals its rationality of the construction process and technical control measures.As its focusing on the coordination between construction monitoring and control,the paper demonstrates strong maneuverability and obvious effects in similar construction process.Finally,this paper concludes the main factors influencing the deformation of the apron and the main way to control the surface deformation in construction of shield tunnel, provides a certain reference for the construction of similar projects.