Rapid support dismounting construction method for 6-8m deep inclined throwing support type foundation pit of two-layer basement

The invention discloses a rapid support dismounting construction method for a 6-8 m deep inclined throwing support type foundation pit of a two-layer basement, and belongs to the technical field of building construction. The method is mainly used for building construction of a two-layer basement with the depth of 6-8 m underground in constructional engineering and specifically comprises the following steps that S1, the ground is leveled, and pile tops are sloped; s2, enclosure construction; s3, placing a beam to reversely press the soil body; s4, excavation of a foundation pit; s5, basement bottom plate and bracket construction; s6, erecting an inclined support; s7, excavating the reserved soil body; s8, a basement bottom plate is comprehensively constructed; s9, a concrete support changing force transmission device is constructed; s10, the inclined support and the bracket are dismantled; s11, the rest part is comprehensively constructed; an inclined support is replaced by the support changing force transmiss