桥梁加固技术的发展及其应用

The Development and Application of Technology Bridge Strengthening

由于推行拖挂运输和集装箱运输以及改装车辆的日益增加和桥龄的增长．故我国在1982年的荷载标准以前建造的桥梁普遍存在承载力不足、老化、破损、裂缝等现象。这一情况．不仅在我国各省市、地区不同程度地存在．在一些工业发达的国家．如美、日、欧洲等国家．也普遍存在。

Because of pushing forward introduction of drag transportation, container transportation and the increasing numbers of vehicles conversion as well as the growing of bridge age the old bridges constructed prior to the load standard promulgated in 1982 all, in general, have such problems as insufficient carrying load, aging, damages and cracks. Such conditions exist not only in some Chinese cities but also in number of the developed countries, for example, the United States, Japan and a few European countries. It costs not only large amount of money, man power and materials, but also time to build new bridges, all countries, therefore, pay more attention to repairing old ones and make full use of them through repairing and reinforcing engineering. The bridge is just like a throat ensuring smooth pass on the highway and the load carrying and traffic capacities of the bridges are even the keys for linking the complete highway. In this regard, concerns have been caused and brought to the research, test and practical application of the issues of bridge repair and strengthening and how to raise its load carrying capacity and etc. This article mainly describes thereinforcement methods for the insufficient capacity of bridge.