喷锚加固补强的小梁试验与实桥加固

The Experiment of Strengthened Small Beam with Spraying Concrete and the Strengthening Bridge

本文对喷射混凝土加固补强技术进行了研究,通过对30根原试验小梁采用底喷、侧喷技术加固补强,探讨了补强截面与原截面的粘结可靠性和共同工作能力,以及喷射后结构承载能力的提高幅度。并将试验研究结果用在双曲拱桥的实桥加固上。经过静载试验证明,采用喷射混凝土技术对结构进行加固补强是可行的,技术上是可靠的,有广泛的应用前景。

The paper inquires into strengthening technique of spraying concrete. By means of testing 30 small beams that were strengthened with spraying concrete on the bottoms and sides, and to study the cohesion reliability and co-work capability of the strengthened sections with the original sections, and the increasing range of the construction loading capacity after strengthening. Furthermore, the experimental results have been applied to the strengthening of the. double curved arch bribge, It is feasible to strengthen the construction with spraying concrete. The technique is reliable and has a wide prospect in using. It has been proved by dead load test.