Residual Analysis in Inverse Identification of Total Thrust on Shield Tunneling Machine

Abstract

Total thrust on shield tunneling machine is the most important mechanical quantity, while its also the core parameter which can reflect the geological adaptability of the shield. Mechanical model of total thrust is established by applying the mechanical analysis firstly. Multiple regression method is applied to indentify undetermined coefficients of mechanical model. Based on the on-site data acquired from Rd. TieDong to Rd. ZhangXingZhuang of Tianjin No.3 subway project, regularity and compositions of model residual are discussed and inverse identification model of total thrust is further proposed. The comparison between identification results and the on-site data verifies the feasibility of inverse identification model. Analysis results indicate that inverse identification model can dynamically reflect the relationship among total thrust, operating parameters and geological parameters. This work can offer helpful references for thrust selection and real-time control.