Subway vehicle base maintenance pit structure using assembly type stand columns

The utility model discloses a metro vehicle base overhaul pit structure using assembly type stand columns, which comprises a foundation structure of an overhaul pit and prefabricated stand columns, the foundation structure is provided with a ground beam along the laying direction of steel rails, the prefabricated stand columns are arranged on the ground beam at intervals, reserved joint bars are arranged on the top surface of the ground beam, and grouting sleeves are arranged at the bottoms of the prefabricated stand columns. An erecting auxiliary sleeve is arranged in the middle of the prefabricated stand column, and a steel rail is arranged at the top of the prefabricated stand column; the stand columns are prefabricated stand columns produced in factories, multi-specialty procedure interpenetration of the vehicle depot is effectively reduced, other specialties can be inserted for construction in advance when the stand columns are prefabricated, the construction quality is controllable, the construction eff