The invention relates to a method for constructing an upper conduit frame of a six-
pile conduit frame. The construction method comprises the steps of first segmenting the upper conduit frame: dividing the conduit frame into seven segments in total, wherein a main
barrel is independently a segment and is marked as D01, with a weight of 157 tons; inclined strut steel pipes, horizontal supporting steel pipes and
pile sleeves form six L-shaped segments, correspond to steel
pipe pile, and are sequentially marked as G01, G02, G03, G04, G05 and G06, and the
single segment weighs 59 tons. The construction method comprises the steps that
steel plates are inspected after arriving; and according to a jacking diagram, the
steel plates are subjected to blanking, lineration and groove
cutting, steel plate
machining edge rolling, cylinder splicing,
assembly welding, jig frame manufacture, segmenting pre-folding, segmented handing over for examination and segmented
coating. The method has the advantages that horizontal type pre-
assembly is performed; by segmented manufacture of the main
barrel and a supporting
pipe, the inclined strut steel pipes are divided into two segments to be pre-assembled, finally the size of each segment is determined, and the precision is high; vertical type folding is performed, and the method facilitates final
assembly.