Response of multi-steel shotcrete under load in subway excavations

Through the construction monitoring of subway station excavation in Cultural and Artistic Center of Jinan, change of axial force and deformation of steel shotcrete is gained in time. Combined with the design plan, the influencing factors for the axial force are analyzed: (1) the axial force of the first steel shotcrete is larger than the design value under certain construction conditions, and it is larger than that of the second and the third ones; (2) the temperature and axial force are gained to determine the temperature correction factor by inverse computation; (3) to rationally determine the pre-tension to reduce stress loss so as to make full play of multi-steel shotcrete. The results may make the monitoring works more exact and the design theory more perfect.