Metro station deep pit support structure construction method

The invention discloses a metro station deep pit support structure construction method, and relates to a construction method. The metro station deep pit support structure construction method solves the problem that a traditional construction method is limited by the height, metro station deep pit support structure construction cannot be normally carried out. The metro station deep pit support structure construction method has the steps that (1) surveying and setting out are carried out; (2) a channel type cutting cement continuous wall is constructed; (3) wall core taking test detection is carried out; (4) through a core taking test, after it is judged that the wall lateral-confinement-free compressive strength is not smaller than 0.6 Mpa, bored pile construction is carried out; (5) boredpile pore-forming construction is carried out; (6) bored pile pore-forming detection is carried out; (7) hoisting, installing and concreting according to sections are carried out on bored pile reinforcement cages; and (8) cir