BRIDGE CRANE, BRIDGE ERECTION METHOD AND BRIDGE REMOVAL METHOD

摘要

PROBLEM TO BE SOLVED: To provide a bridge crane capable of minimizing necessity of traffic regulation when erecting a precast girder and then easily executing transfer work to the next erection span.;SOLUTION: When erecting a precast girder 14 to an erection span S0, by a bridge crane 110 installed on an upper surface of a bridge pier 12A, in the state of hoisting and supporting the precast girder 14 through a girder hoisting nose 50, it is hoisted and moved to an erection scheduled position in a bridge axis orthogonal direction. At the time, a second leg 140 of the bridge crane 110 comprises a pair of movable legs 140A and 140B. Then, when a hoisting device 150 is moved in the bridge axis orthogonal direction and passes through installation parts of the respective movable legs 140A and 140B, the respective movable legs 140A and 140B are successively moved to an interference evading position at which it is possible to evade interference with the girder hoisting nose 50 hoisted and supported by the hoisting device 150. Thus, the girder hoisting nose 50 is prevented from interfering with both of the movable legs 140A and 140B.;COPYRIGHT: (C)2013,JPO&INPIT