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国内近年来高、快速公路的建设,多数路段采高架工程,新建桥梁多采用长跨度或连续梁桥,因此伸缩缝型式及伸缩量不断的创新与扩大,构造日益复杂,以致造成伸缩缝的损坏情形亦较为频繁、显着。伸缩缝的维修与换装不仅施工中交通维持困难,而且相当危险,尤其在通车压力、车流震动以及有限空间中,要做好维修工作并不容易,同时也必须付出极高的社会成本和代价。本文根据调查实际损坏及施工作业情形,探讨伸缩缝损坏成因及设计、材料与施工缺失问题,分析其损坏原因、损坏形式与相关影响因素及提出施工注意事项与改善建议,最后是结论及建议。
In recent years, the construction of highways and expressways in China has taken the construction of highways and highways. Most of the sections adopt overhead structures and long bridges or bridges are used for new bridges. As a result, the type of expansion joints and the amount of expansion and contraction continue to be innovated and expanded, resulting in increasingly complicated structures that cause damage to expansion joints The situation is also more frequent and significant. The maintenance and replacement of expansion joints not only make it difficult to maintain traffic during construction, but also quite dangerous. In particular, it is not easy to carry out maintenance work especially in traffic pressure, traffic vibration and limited space, and meanwhile it has to pay a very high social cost and cost . Based on the investigation of the actual damage and the construction operation, this paper discusses the cause of the expansion joints damage and the problems of the design, materials and construction lacking, analyzes the causes of the damage, the forms of damage and the related influencing factors and puts forward the construction precautions and suggestions. Finally, conclusions and recommendations.