ABSTRACT
Shield tunnel is a typical linear structure with extreme dimension scale in longitudinal direction and assembled by several segments, which is prone to differential settlement due to the disturbance of adjacent construction, which will endanger the safety of tunnel operation. At present, soil grouting is mainly used for settlement control in practice. However, grouting parameters always rely on engineer experiences. It is necessary to analyze the influence of grouting parameters on the effect of grouting lifting. In this study, a finite difference numerical simulation method is employed for analyzing the grouting impact at the shield tunnel. The influence of typical grouting parameters including the grouting volume and grouting range on tunnel settlement control was analyzed in more detail. Simulation results demonstrate that grouting can effectively recover the differential settlement of tunnel lining, and the selected grouting parameters have significant effects.
