Method for excavating earth under interface layer by adopting belt conveyor in reverse construction method

The invention relates to a method for carrying out earth excavation under an interface layer through a reverse construction method by adopting a belt conveyor, and belongs to the technical field of building construction.The method comprises the following steps that S1, when earth excavation is carried out between the earth surface and the interface layer, a temporary earth riding track between the earth surface and the interface layer is built; s2, when an interface layer is excavated, an interface layer structure top plate is constructed; s3, part of earthwork of the temporary soil riding track is loaded into an earthwork inlet of a belt conveyor 1 and transported outwards through the belt conveyor 1, and then a structural top plate of the temporary soil riding track occupying part is constructed; s4, after the interface layer structure top plate is constructed, belt conveyors 2, 3 and 4 are arranged; and S5, earth excavation under a top plate of the interface layer structure is conducted, a belt conveyor 3