The invention discloses an overlapping integral type prefabricated
assembly structure for a comprehensive
pipe gallery and a construction method thereof. The overlapping integral type prefabricated
assembly structure comprises envelop enclosures, a
pipe gallery prefabricated
assembly structure body, a bottom plate
cushion course and a completely outer-cladding waterproof layer, wherein the envelop enclosures are located in a foundation pit; the
pipe gallery prefabricated
assembly structure body is arranged between the envelop enclosures; the bottom plate
cushion course is arranged under the pipe gallery prefabricated
assembly structure body; and the completely outer-cladding waterproof layer is arranged on the outer side surface of the pipe gallery prefabricated
assembly structure body in a
cladding mode. The upper portion of the pipe gallery prefabricated assembly structure body is filled with backfill earth, and the completely outer-cladding waterproof layer is arranged on the outer side surface of an outer side cast-in-situ part of the pipe gallery prefabricated assembly structure body in a
cladding mode. The construction method of the overlapping integral type prefabricated assembly structure comprises the steps of prefabricated component
machining, foundation pit excavation, bottom plate pouring, side wall construction, mid-partition construction, top plate construction, earth backfilling and the like. According to the overlapping integral type prefabricated assembly structure for the comprehensive pipe gallery and the construction method thereof, the prominent problems of force bearing of joints,
water seepage of connection seams and the like in the underground
engineering prefabrication process are solved; and the structural
modes of bottom plate
casting in situ, side wall single-layer overlapping, mid-partition double-layer overlapping, top plate overlapping, all-joint
casting in situ and completely outer-side waterproof layer cladding are adopted, so that effective connection and the waterproof function of the joints are ensured.