Abstract:Deformation monitoring and control measures of a shallowburied largespan tunnel constructed using the pilebeamarch (PBA) method are described, taking the North Gongti Road Station of Beijing Metro line 10 as an example. Based on the monitoring datum, the crown settlement, convergence, ground settlement of the tunnel and the bridge foundation settlement are analyzed. The results show that (1) the PBA tunneling method can restrain the ground settlement and deformation of a shallowburied largespan tunnel; (2) the depth, tunnel span and pilot tunnel construction may influence the deformation of a shallowburied largesection tunnel significantly; and, (3) advanced conduit grouting, timely preliminary support and permanent lining construction can reduce the deformation effectively.