由桥梁上部结构传至墩顶的纵向作用力,不仅涉及墩台及其基础的荷载问题.与桥梁造价息息相关,而且由于现代铁路长钢轨的大量应用。它还会造成桥上钢轨过大的附加应力.危及桥上线路状态的稳定性及行车安全。随着我国铁路向高速、重载发展.这一问题更显突出。先期发展高速铁路的德、日等国家,均十分重视这一问题,先后采用了不同形式的梁端纵 The longitudinal force transmitted from the superstructure of the bridge to the top of the piers not only involves the load of the pier and its foundation, but also is closely related to the cost of the bridge and due to the large number of applications of the long rail of modern railways. It can also cause excessive additional stress on the rails on the bridge, compromising the stability of the line conditions on the bridge and driving safety. With the rapid development of China’s railways, heavy load development. This issue is even more prominent. Early development of high-speed railway in Germany, Japan and other countries, all attach great importance to this issue, has adopted a different form of Liang Zongli