PRELIMINARY DESIGN FOR PEA GRAVEL GROUTING IN TBM TUNNELLING
隧洞豆砾石灌浆软模止浆梗初步设计

In the light of disadvantage of the tunnelling without grouting seal ring, a design of pea gravel grouting is presented in TBM tunnelling with soft model. Using soft model to set the grouting seal ring, the strength, antileakage and density of the pea gravel will be improved.