Assembling method and assembly jig of building structure composed of pipe structure

Abstract

The invention provides a method and an assembly jig for fixing a pipe structure unit manufactured by assembling tenons and mortises formed on end portions of pipes to a building structure. The pipe structure unit 10 comprises large-diameter pipes 20, 30, 40 and 50 and small-diameter pipes 60, 70 and 80 which are assembled on an assembly jig 100 by assembling tenons and mortises formed in advance on the ends of the pipes via laser machining. The pipes are provided with mounting portions disposed on the other ends thereof, which are used to temporarily tighten the pipes to flanges of pillars 200 and 210 . A jack 130 of the assembly jig 100 is lifted to compress the gaps formed at the tenons and temporarily tightened portions, and the pipes are fully tightened in this state. If necessary, the joint portions of the pipes are welded via spot welding and the like to complete the building structure.

1 . An assembling method of a building structure composed of a pipe structure unit having a trussed structure, comprising the steps of: 
 preparing a plurality of pipes having an end face and a necessary tenon, mortise or tenon groove for joining formed on one end thereof, and a mounting unit disposed on the other end thereof for mounting to a corresponding member;    temporarily tightening the mounting unit of each pipe to the corresponding member;    joining the joining end faces of the pipes on an assembly jig to form a joint portion;    compressing a gap formed between the joint portion and the mounting units by lifting the assembly jig;    fully tightening the mounting unit of each pipe; and    fixing the joint portion via welding.    
   
   
       2 . An assembling method of a building structure according to  claim 1 , wherein 
 the end faces and necessary tenons, mortises or tenon grooves formed to the joint portion of the pipes constituting the pipe structure unit are formed via high-precision laser processing based on processing data computed based on a three-dimensional CAD and CAM information of the joint portion.    
   
   
       3 . An assembly jig of a pipe structure unit comprising a base, a table provided on the base and capable of being lifted and lowered via a jack, and a jig unit mounted on the table, wherein 
 the jig unit is composed of orthogonally arranged panel members, a profile of the upper surface of the panel members formed to have a shape enabling to support from underneath a joint portion of the pipe structure unit being assembled.    
   
   
       4 . The assembly jig of a pipe structure unit according to  claim 3 , wherein the profile of the jig unit is formed via high-precision laser processing based on processing data computed based on a three-dimensional CAD and CAM information of the joint portion of the pipe structure unit.