| 摘要 |
PURPOSE: To eliminate operation at a high place and at a narrow place, to improve safety and save labor, to conduct raising and lowering work or lateral movement work easily and rapidly, to prevent an accident at the time of raising and lowering and at the time of lateral movement and to perform operation safely at the time of the transfer construction of a bridge girder. CONSTITUTION: A plurality of stages of large-sized unit bent members 1 disposed between a bridge girder G and a ground and a pair of raising machines 2 with guide posts 4, lifting-lowering drive mechanisms 5, forks 6 for raising and lateral shifters 7 installed on the ground are used, the unit bent member 1 is extended at the lowermost stage of the bent members borne by a pair of the raising machines 2, and the unit bent member 1 at the lowermost stage is elevated by a pair of the raising machines 2. The extension and elevation are repeated successively, and the bridge girder G is raised together with the bent members. The bent members 1 are placed on a pair of the raising machines 2, and the bridge girder G is moved laterally together with the bent members 1. Each raising machine 2 is synchronized by a centralized controller, and lifting and lowering are controlled and lateral movement is controlled. |
