Multi-span continuous P.S.C. - I beam bridge and its construction method

摘要

P The present invention is a continuous span. S.-seed relates to a construction method and structure of the composite girder bridge ahyibim Conventionally, blood is prestressed so that the continuous compression of each span beam (1) seed. (PC) strand (3) when placed in tension to be a tensile stress occurs in concrete slab (2).; The invention lower blood when the beam as shown in Fig. 1, 2 and 3 illustrate manufacture the ground beforehand. Seed. Strand 4 and the intermediate portion P, Mr.. Separated by a strand (5) lower blood seeds. Strand 4 is then in a pre-tension the fixing in the ground state hypothesis for each of the beams (1) over a shift (9) or bridge pier 10, the intermediate portion P, Mr.. The blood-span tensile of fixing the strands (5). S. seed-according to the construction method of ahyibim bridge, Fig. 2, the upper blood even in the slab cross-section, such as 3 seed. Placing the strand (7) in parallel to the longitudinal direction of the bridge and seal fixing by first introducing a prestress compression stress in the concrete slab (2) offset by the tensile stresses mentioned above and to chairs.