PURPOSE: A construction method for a continuous supporting structure in a corrugated steel plate prestressed concrete composite I-beam bridge is provided to reduce a girder depth and extend an application span by decreasing maximum positive moment generated in the central part of a span. CONSTITUTION: A construction method for a continuous supporting structure in a corrugated steel plate prestressed concrete composite I-beam bridge comprises the following steps: manufacturing composite I-beams (G1,G2) which are formed with a spot shear connection part (101) and a spot expansion block (121); holding the composite I-beams on an abutment and a pier by each span; making a corrugated steel plate (11) to be continuous by joining adjacent spot shear connection parts in both side spans by each spots on the pier; forming a spot cross beam (14) by laterally pouring and curing concrete on the straight top surface of a bridge seat device; and inserting a top tendon (122) to settle down with extension by passing through the spot expansion block and the spot cross beam.
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