The lifting oil cylinder is connected with the longitudinal beam of the top die body, and the vertical positioning and demoulding of the trolley are adjusted through the contraction of the oil cylinder. There are two oil cylinders in front and back of the translation device in the horizontal direction, which are used to adjust the center of formwork lining to be consistent with the center of tunnel, and the translation amount is about100 mm. Four-door frame assembly: The door frame is the main load-bearing part of the whole car, which is made up of beams, columns and longitudinal beams connected by bolts, and the beams and columns are connected by connecting beams and diagonal tie rods. The main structural parts of portal frame are welded with steel plates, beams and columns are welded with steel plates into I-beams, and longitudinal beams are welded with box sections. The longitudinal connecting beam between beams is made of section steel, and the longitudinal support is made of section steel diagonal braces. The portal frame assembly consists of six portal frames connected by bolts. & lt Five-master-slave walking structure: The trolley walking mechanism is generally composed of two active walking mechanisms and two driven walking mechanisms. The motor power is 2? 1 1KW, and the running speed of the car is 6.8m/min. & lt Six screw rods and jacks: * * parting screw rod, grounding screw rod, top formwork supporting jack, bottom longitudinal beam supporting jack and anti-floating jack. 1. Side formwork lead screw: installed between the side formwork beam and the gantry, used to support and adjust the position of the formwork and bear the pressure generated when pouring concrete. Screw diameter is