ABSTRACT
The control technology of double-fluid light-disturbance grouting on both sides of existing tunnels with large transverse deformation for rehabilitation has been widely used. Horizontal transverse convergence is commonly used in practice as a single index to measure the effect of grouting treatment, without considering the joint behavior. In this paper, numerical simulation is used to simulate the effect of grouting rehabilitation in two cases of the shield tunnels with symmetric and asymmetric deformation. In this paper, the development path and recovery path are used to characterize the variation of joint behavior with decreasing transverse convergence during the whole process of grouting. Studies have shown that the final rehabilitation of joints within the direct action of grouting is better. The grouting treatment of joints in tunnels with asymmetric deformations is weaker compared to those with symmetric deformations. During the grouting process on one side of the tunnel, the joints on the grouting side are subjected to greater disturbance, which requires strict control of the grouting parameters in practice.
