Prevent subsidence structure using shield tunnel construction and its method

摘要

According to an aspect of the present invention, there is provided an excavation structure using a tunnel boring machine (TBM) for excavating a tunnel, comprising: a machine section for excavating the tunnel; A propelling tube having a base for propelling the machine part and a plurality of propelling tubes formed with grout balls; An anti-collapse member filled in an annular gap, which is a space formed between the propulsion tube and the outer surface of the excavation of the tunnel generated while the machine is being propelled through a connection pipe connected to the grout hole of the propulsion tube; And a back fill member for inflating the anti-collapse member after being expanded in an annular gap.As described above, according to the present invention, as the collapse preventing member is inflated again in the inside of the annular gap to fill the inside of the annular gap, it is possible to suppress the dislodgement and collapse of the toe soil and the collapse of the ground, It is possible to provide a shield tunnel excavation structure using the ground subsidence prevention system and a method thereof so as not to expand the ground excavation to the ground depression.