Assembled square-barrel multi-layer concrete underground garage and manufacturing method thereof

The invention relates to an assembled square-barrel multi-layer concrete underground garage and a manufacturing method thereof, belonging to an assembled multi-layer concrete underground garage and a manufacturing method thereof. The underground garage of the invention comprises a body composed of a ground transferring room, a top cover plate, a platform, square tube wall, a parking girder, an underground equipment room and the like. Except that the underground garage bottom and the equipment base in the construction structure of the garage adopt cast-in-place concrete, other equipment is formed by combining, assembling and fastening various concrete prefabricated parts by non-splicing prestressed tendons and anchors. The whole assembling and fixing process does not need to weld and to be fastened by bolts. The structure has high combination speed, high strength and high precision. The square-barrel multi-layer concrete underground garage of the invention has simple construction, convenient manufacture and low construction cost, is safe and reliable and does not need large equipment. The open caisson construction has small land occupation, and construction and building can be carried out in the yard, out of the building and on the wayside.