| 摘要 |
PROBLEM TO BE SOLVED: To improve the efficiency of tension work by forming threads at both ends of tension material inserted through concrete blocks, and laying connecting members with threads formed at end parts, between the end parts of the adjacent tension material, and connecting the tension material and the connecting members. SOLUTION: At the time of loading prestress for the reinforcement of a plurality of concrete girders 1, disposed parallelly in the width direction of a bridge girder, on the outside of the concrete girders 1, concrete blocks 2, 2 are installed on both sides of each concrete girder 1, and tension material 3 are inserted through between both ends of a pair of concrete blocks 2, 2 with the concrete girder 1 held between, and temporarily fastened. Thread parts are formed at both end parts of the tension material 3 inserted through in the concrete blocks 2, and connecting members 4 with thread parts formed at both end parts are laid between the end parts of tension material 3, 3 adjacent on the same line. The tension material 3 and the connecting member 4 are connected to make a plurality of tension material 3 on the same line into one line. Prestress loading work is thereby simplified, and the dispersion of tensile force can be prevented. |
