桥式起重机车轮啃轨和大梁下挠,是我国起重机制造和修理中常遇到的比较难解决的问题。我厂桁车数量和种类多,啃轨下挠的现象也比较严重。经过十多年的探讨和实践,对国产桁车的啃轨修复和大梁下挠热矫正及预应力机械加固恢复上拱方面有了一些体会。 Bridge crane wheel gnawing rails and girder deflection, crane manufacturing and repair is often encountered in China more difficult to solve the problem. My factory truss number and variety of more, eating rail under the deflection phenomenon is more serious. After more than a decade of exploration and practice, some experiences have been gained in the field of repairing gnawing rails and repairing girders under the girder and prestressing mechanical reinforcement.