The construction of urban shallow tunnels in silt stratum is a puzzle for engineering circles. The construction plan adopts comprehensive support system: high-pressure jet grouting pile, advanced small conduit and circumferential grouting. The well-point precipitation method and three-bench seven-step excavation method of shallow tunnel construction of the East Hudong Road Tunnel through the silt stratum in Fujian Province is carried out. In this paper, the tunnel construction method and in-situ monitoring tests are used to analyze the characteristics of the surface subsidence and the crown settlement. Meanwhile the reasonable allowance deformation is discussed in the city tunnel design in silt stratum.

CICTP