HYDRAULIC TUNNEL OPEN-CUT STRUCTURE EXTERNAL MOLD FORMWORK AND CONSTRUCTION METHOD

Disclosed in the present invention are a hydraulic tunnel open-cut structure external mold formwork and a construction method. The hydraulic tunnel open-cut structure external mold formwork comprises a plurality of external mold formworks longitudinally arranged along a central axis. Each external mold formwork comprises external molds A, external molds B, and external molds C which are respectively symmetrically arranged. The external molds A, the external molds B, and the external molds C are connected by means of bolts, and the external mold formworks longitudinally arranged along the central axis are connected by means of bolts. The upper portion of each external mold formwork is correspondingly connected to a group of back frames. A pair of vertical supports are symmetrically connected to two sides of each external mold formwork. According to the present invention, a working face is expanded from an under-cut working face to an open-cut working face, thereby providing spatial conditions for the working o