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J-75桥梁伸缩装置是交通部“七五”科研项目,经过设计、试验、试制及一年多的实桥应用,证明已取得成功,1992年11月6日在西安通过了交通部鉴定。该装置具有使用寿命长,伸缩量大,防水性好,行车平稳,安装方便,维护简单等特点。目前已应用于10余座大桥,其使用性能良好,明显地优于国内现有各种桥梁伸缩装置;与国外同类产品比较,综合技术性能和指标也达到当前的先进水平。
J-75 bridge telescopic device is the “Seventh Five-Year” research project of Ministry of Communications. It has been proved successful after its design, test, trial production and more than one year of actual bridge application. It was appraised by the Ministry of Communications on November 6, 1992 in Xi’an. The device has the characteristics of long service life, large amount of expansion and contraction, good waterproofing, smooth running, convenient installation and simple maintenance. At present, it has been applied to more than 10 bridges and its performance is good. It is obviously superior to the existing bridge expansion and contraction devices in China. Compared with similar foreign products, the comprehensive technical performance and indexes have also reached the advanced level at present.