预应力砼连续箱梁裂缝成因分析及防护措施

Cause Analysis and Protective Measures of Cracks in Prestressed Concrete Continuous Box Girder

预应力砼连续箱梁属主要的桥梁结构型式,也普遍的被用于工程项目中。预应力砼连续箱梁裂缝表现形式复杂,发生情况多样。在建造与使用桥梁的过程中,由于出现一些像类似裂缝这样的工程质量问题从而发生了很多的桥梁坍塌事件。这些工程质量——裂缝其实就是桥梁的"多发病"以及"常发病"了,我们的工程技术人员也是对于这个混凝土开裂问题非常烦恼。当然了,对于这些裂缝来说如果采用一定的技术和工程措施也是能够控制和解决的。因此为了以后工程中减少混凝土开裂现象,以此为研究目的,本文对预应力在混凝土连续箱梁的应用方面,做出相应的分析总结,找出相应的解决方案,以便保证以后工程的安全性。

Prestressed concrete continuous box girder is a main type of bridge structure and is also widely used in engineering projects.Prestressed concrete continuous box girders have complex forms of cracks and occur in a variety of situations. During the construction and use of bridges, many bridge collapses occurred due to engineering quality problems such as similar cracks. The quality of these projects：the cracks are common disease of the bridges. Our engineers and technicians are also very annoyed with this concrete cracking problem. Of course, for these cracks, if certain technical and engineering measures are adopted, they can be controlled and resolved. Therefore, in order to reduce the cracking phenomenon of concrete in future projects, this paper makes a corresponding analysis and conclusion on the application of prestressed concrete in continuous box girder, and finds the corresponding solution to ensure the future project safety.