Experiment of Back-Fill Grouting on Shield Tunneling
Yukinori KOYAMA, Mitsuru SHIMIZU, Yutaka SATO, Noriyuki OKANO
Back-fill grouting model tests have been carried out and the behavior of back-fill grouting of shield driven tunnel is discussed in this paper. Back-fill grouting of shield driven tunnel is significant for not only surrounding ground but also acting load on tunnel. Ground displacement and acting pressure on the tunnel model were measured during back-fill grouting. Some durability tests for grout materials have also been done. In the model tests, the injection pressure and stiffness of surrounding ground had a significant influence on the acting pressure on the tunnel model and ground displacement.