The invention relates to a construction method of rapid excavation of
earthworks of a
subway station row
pile and a super large and super deep foundation pit with an internal stay. The construction method includes the following steps that the number of excavation
layers and the excavation depth of each layer are designed according to the relative relation among a
subway station foundation pit support structured crown beam, the support drawing elevation and the actual site elevation; the excavation routes and steps are divided into five parts, firstly,
earthworks above the elevation of the crown beam bottom are excavated; secondly,
earthworks of the opening part of the row
pile are excavated; thirdly, a
rope saw is used for
punching in the row
pile on the lower part of the crown beam; fourthly, earthworks in the range of an opening elevation foundation pit are excavated; and fifthly, lower earthworks in the range of an opening elevation foundation pit are excavated. According to the construction method of rapid excavation of the earthworks of the
subway station row pile and the super large and super deep foundation pit with an internal stay, a portal and a
slag car transport ramp are newly arranged on the row pile below the foundation pit crown beam, earthwork excavation is conducted using common excavation machines, the investment of large excavation machines is reduced, meanwhile, the construction speed is increased, the construction period is shortened, and then the cost is saved; and the excavation working efficiency of the earthworks cannot be limited due to the super-
long span of the foundation pit, the schedule of the construction period is ensured, and the budget of the construction period is facilitated.