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一、裂紋之观测目前运营綫路上的普通鋼筋混凝土梁及予应力梁均存在着不同程度的裂紋。观测裂紋之目的不仅是为了正确掌握桥梁設备的技术状态,制定运营条件和旨在保証行车安全的措施,而且在于从大量的观测資料中,找出裂紋发生和发展的规律,裂紋长度、寬度、部位及走向等分布规律,分析其产生和发展的原因,寻求控制裂紋扩展的有效措施,改进設計和制造中的缺点,制定严寬恰当的处理界限,研究裂紋修补方法等。
First, the crack observation Currently operating ordinary reinforced concrete beams and prestressed beams there are varying degrees of cracks. The purpose of observing cracks is not only to correctly grasp the technical status of bridge equipment, to set operating conditions and measures designed to ensure driving safety, but also to find out the law of occurrence and development of cracks from a large amount of observation data. The crack length and width , Parts and trends of the distribution of the reasons for its production and development, to seek effective measures to control crack growth, to improve the design and manufacturing shortcomings, to develop a strict appropriate limits of treatment, the study of crack repair methods.