The invention relates to the field of subway design and construction, and provides a close-fitting open and underground excavation combined
subway station structure and a construction method thereof.The close-fitting type open and underground excavation combined
subway station structure and the construction method thereof aim to solve the problems of
subway station land occupation, demolition, underground excavation
scale control, construction difficulty control,
risk control and the like. The construction method of the close-fitting open and underground excavation combined subway
station comprises the following steps that an open and underground excavation ranges and boundaries are determined; the open excavation part is provided with
fender posts; an underground excavation transverse
pipe shed is constructed; excavating is carried out to a base of the open excavation part, an anti-pulling structure, a waterproof
system and an open excavation main body are constructed, a
steel bar connector is reserved at a connecting opening between open excavation and underground excavation, and backfilling and earthing are carried out; an advanced small
pipe is constructed; the open excavationfender posts at the transverse boundary between open excavation and underground excavation are removed, and an underground excavation part is constructed longitudinally in
pilot tunnels according toa bench
cut method; an underground excavation secondary lining is constructed; and the open excavation
fender posts and underground excavation primary supports at the longitudinal boundary between open excavation and underground excavation are removed in sections, and connecting structures and waterproof systems of a top plate and a bottom plate at the connecting opening between open excavation and underground excavation are constructed. The close-fitting type open and underground excavation combined subway
station structure and the construction method thereof have the beneficial effects thatdemolition is avoided, risks and investment are controlled, the project progress is guaranteed and the coordination difficulty is reduced.