首页|Investigation of progressive settlement of sandy cobble strata for shield tunnels with different burial depths
Investigation of progressive settlement of sandy cobble strata for shield tunnels with different burial depths
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NSTL
Elsevier
The tunnel face stability is a key issue to ensure the engineering safety. Combined with model tests and numerical simulations, this paper focuses on progressive settlement characteristics of sandy cobble strata for shield tunnels during the instability process. Burial depths are the main parameter in this study, and ratios of burial depth and tunnel diameter were set as 0.5, 1.0 and 2.0, respectively. The results show that the surface settlement value decreases with the increase of the burial depth ratio. In addition, the time of local instability is negatively correlated with the burial depth ratio. The soil disturbance range of tunnel face instability with relatively large burial depth is significantly smaller than that with small burial depth. This provides a reference for the research on the strata deformation caused by the instability of the tunnel face in the sandy cobble strata.
NSTL
Elsevier
