桥梁伸缩装置评述

Comment on Bridge Expansion & Contraction Device

我国桥梁技术规范及工程质量检验评定标准中，对桥梁伸缩装置未作具体技术指标规定。拟通过各种代表性桥梁伸缩装置使用性能分析和发展过程的论述，说明浅埋式型钢伸缩装置技术先进，经济合理。

In our country bridge technical standards and engineering quality test evaluation standards,bridge expansion device hasn′t be stipulated specifically.By analysing and discussing on usage capacity of bridge expansion device and development process,the paper gives advanced technology,rational economy of expansion device,which can widely used in bridge expansion joints.