简支梁桥伸缩缝防水构造的改进思路

Improvement Ideas for the Waterproof Structure of Expansion Joints in Simply Supported Beam Bridge

摘要: 随着交通事业的蓬勃发展，简支梁桥因结构简单、施工便捷在桥梁工程中广泛应用，但其伸缩缝防水构造的可靠性直接影响桥梁使用寿命与运营安全。本文针对现有简支梁桥伸缩缝常见的漏水、变形失效等病害，深入剖析材料性能不足、设计构造缺陷、施工工艺不规范及养护管理缺失等原因。基于此，从材料创新和施工工艺改进两方面提出防水构造改进思路，如采用高性能密封胶、增设排水槽、制定精细化施工流程等。研究成果为简支梁桥伸缩缝防水构造的设计、施工与维护提供了参考依据，对提升桥梁工程质量具有重要现实意义。

Abstract: With the vigorous development of the transportation industry, simply supported beam bridges are widely used in bridge engineering due to their simple structure and convenient construction. However, the reliability of the waterproof structure of their expansion joints directly affects the service life and operational safety of the bridges. This paper focuses on common diseases such as water leakage and deformation failure of expansion joints in existing simply supported beam bridges, and deeply analyzes the causes including insufficient material performance, defects in design and structure, non-standard construction techniques, and lack of maintenance management. Based on this, it puts forward ideas for improving the waterproof structure from three aspects: material innovation, structural design optimization and construction technology improvement. For example, using high-performance sealants, adding drainage grooves, and formulating refined construction processes. The research results provide a reference for the design, construction and maintenance of the waterproof structure of expansion joints in simply supported beam bridges, and have important practical significance for improving the quality of bridge engineering.