Construction method of cast-in-place box girder adjacent to metro section

The invention discloses a construction method of a cast-in-place box girder adjacent to a metro section, which comprises the following steps of: 1, leveling a foundation, mounting a bracket, then assembling reinforcement cages of all parts and erecting a template; secondly, the U-shaped frame is erected above the reinforcement cage; thirdly, the tail end of a concrete pump truck conveying pipe is inserted into the inserting groove, and then concrete conveying is conducted; 4, according to the cast-in-place condition, a winding drum at the corresponding position is rotated, the transverse positions of the moving plate and the tail end of the concrete pump truck conveying pipe are adjusted, casting operation is conducted in a matched mode, and the pull rope is maintained; fifthly, the U-shaped frame is moved longitudinally, so that the moving plate and the tail end of the concrete pump truck conveying pipe are driven to move longitudinally, and pouring operation is conducted on different positions of the reinfo