Numerical Simulation of Visualized Grout Diffusion in Backfill-grouting of Shield TunnelYihan Zhou, Fei Sun, Di Zhang, Minjian Wen, Zhuqing Zhang, Kang Li and Biao ZhouE3S Web Conf., 618 (2025) 02020DOI: https://doi.org/10.1051/e3sconf/202561802020