Wyniki wyszukiwania - BazTech

Ograniczanie wyników

1 Journal of Theoretical and Applied Mechanics

1 2024

Znaleziono wyników: 1

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

Coupling effect of hole enlargement and diffusion in the grouting process in a weak stratum based on analytical research

Zhao Zenghui, Meng Zhe, Li Longfei, Li Canlin, Yang Peng

Journal of Theoretical and Applied Mechanics

2024

Vol. 62 nr 3

637--649

According to the tail grouting of a double shield TBM tunnel in a soft stratum, the spherical hole model with small and large diﬀusion radius were established respectively considering the slurry diﬀusion and slurry displacement eﬀect in the grouting compaction stage. An- alytical solutions of the spherical hole expansion stress and displacement ﬁeld under the hole expansion-diﬀusion coupling eﬀect are deduced. The interaction among plastic zone radius, reaming radius, initial radius of the spherical hole, and the seepage radius were analyzed. The results show that the larger the seepage pressure of grouting, the smaller the plastic radius. The larger the reaming radius is, the larger the plastic zone radius is. When the reaming radius reaches a certain value, the plastic radius tends to be stable, and the smaller the grouting seepage pressure, the earlier it tends to be stable. The above conclusions have important guiding signiﬁcance for optimizing grouting parameters in weak strata.