Abstract: This paper discusses an interchange construction procedure of ZhuangGai Express Highway Project in Henan Province. The bridge construction involves the posttensioning of eight spans castinplace continuous box girders and three spans castinplace box girders. Among these spans, three spans are over a river and another four spans are over DanDa Express Highway. The construction procedure details of supporting the concrete pour of these structures are provided in the paper.

Key words: cast-in-place box girders, forms, supporting system, bridge construction