Selection of Shield Construction Equipment and Research on Key Parameters of Cutter Head in Upper Soft and Lower Hard Strata
Whether the shield selection is reasonable or not plays a decisive role in the smooth progress of subway tunnel shield construction.In combination with the general requirements of shield selection for the east extension of Fohe section and Hehan section of Qingdao Metro Line 2,the composite earth pressure balance shield scheme is determined by comprehensive comparative analysis of stratum permeability coefficient,rock and soil particle gradation,groundwater pressure,construction efficiency,construction site and environmental impact and economic indicators.In addition,the selection and design of key parts of the shield equipment to be selected are studied,including shield torque,thrust,screw machine unearthed rate,cutter head opening rate and tool equipment,so as to select the most suitable shield equipment for the actual situation of the project.The cutter head parameters and tool arrangement are studied in detail.The cutter head design should not only meet the strength of the tool,but also fully consider the tool spacing and tool wear resistance,so as to ensure the construction efficiency of shield tunneling and achieve the best tunneling effect.
subway tunnelshield selectionearth pressure balancedesign of cutter head parametersadaptability analysis
NETL
NSTL
万方数据
