混凝土因取材广泛,价格低廉,抗压强度高,可浇筑成各种形状,并且耐火性好,不易风化,养护费用低,成为桥梁结构中使用量最广泛的建筑材料。但是,混凝土最主要的缺点是抗拉能力差,容易开裂。混凝土开裂可以说是“常发病”、“多发病”,经常困绕着桥梁工程施工技术人员。其实,如果采取一定的设计和施工措施,在施工过程中产生的很多裂缝是可以克服和控制的。 Due to wide range of materials, low cost, high compressive strength, concrete can be poured into a variety of shapes, and good fire resistance, easy weathering, low maintenance costs, become the most widely used bridge structure construction materials. However, the main disadvantage of concrete is its poor tensile strength and easy cracking. Concrete cracking can be said that “often disease”, “frequently-occurring disease”, often surrounded by bridge construction technicians. In fact, if we adopt certain design and construction measures, many cracks in the construction process can be overcome and controlled.