随着经济的发展,交通工程建设特大型桥梁迅猛发展,结构形式日趋大型化、复杂化,质量要求严格。而混凝土裂缝问题是具有相当普遍性的技术难题。以黄姑塘大桥为例,其主跨80m上部结构均是变截面单箱单室预应力混凝土连续箱梁,论述裂缝产生及怎样控制裂缝。 With the development of economy, the super-large bridge of traffic engineering construction has developed rapidly, and the structure has been increasingly large-scale and complicated with strict quality requirements. The concrete crack problem is quite common technical problems. Take Huanggungtang Bridge as an example, the main structure of the 80m superstructure is a single box single box prestressed concrete continuous box girder of variable cross section, which discusses the production of cracks and how to control the cracks.