Rapid and continuous excavation constructing method for overlarge-diameter soil pressure balance shield

The invention relates to a rapid and continuous excavation constructing method for an overlarge-diameter soil pressure balance shield, in particular to a method which is used for a tunnel project and eliminates slag soil cut by a shield. The method comprises the following steps of: delivering the slag soil cut by the shield into a soil collecting pit of a working well by a synchronous extending horizontal belt conveyor and grasping the slag soil in the soil collecting pit into a hollow soil collecting bin by a vertical grasping bucket; fully and uniformly stirring the slag soil in the hollow soil collecting bin by a horizontal spiral machine, matching with a valve at a discharge opening at the bottom, controlling the excavating speed and leading a soil body to fall into an earthwork vehicle at the lower part; fully loading the earthwork vehicle, switching off the valve of the discharge opening and waiting for the next earthwork vehicle for being in position and loading. The rapid and continuous excavation con