Lining beam assembly, supporting device and straining beam assembly mounting method

The invention provides a straining beam assembly, a supporting device and a straining beam assembly mounting method, and relates to the technical field of straining beams. The straining beam assembly comprises a prefabricated middle beam body and prefabricated end beam bodies. The two ends of the middle beam body are connected with end beam bodies through connecting structures correspondingly, and the end beam bodies are fixed to an external cylindrical piece. The connecting structure comprises an inserting piece and a socket piece, and the inserting piece is used for being inserted into the socket piece in the length direction of the external cylindrical piece. According to the straining beam assembly, the straining beam assembly which is originally constructed on site can be moved to a prefabricating field to be constructed by adopting the prefabricated middle beam body and the prefabricated end beam bodies, so that the appearance and quality of the straining beam assembly can be effectively controlled, the