静载试验是检验桥梁整体受力性能、桥梁设计和施工质量是否满足设计和规范要求的主要方法，也是竣工验收的必要过程。静载试验结果为确定或评定桥梁运营荷载等级最直接且最有效的办法。以青岛 R13线轨道交通先张法预制 U 型梁为例，按照一定抽样频率对成批预制的先张法 U 型梁，进行静载试验，测试 U 型梁在试验荷载下的刚度、应力及裂缝宽度，分析试验结果，该先张法 U 型梁的力学性能均满足规范要求，为今后先张法预制 U 型梁推广使用提供一定的参考。%Bridge’s static load test is an important means of inspecting its overall mechanical performance ,and is also effective measure to check its quality ,and also is a necessary process of its completion and acceptance .At the same time ,the results is the most direct and effective way to assess bridge load grade operations .This research taken the pre- tensioned pre-casted U shaped beam in Qingdao rail transport as an example ,static load tests were carried out for parts of pre-tensioned pre-casted U-beam according to a certain proportion .The mechanical properties of U-beam were analyzed and assessed according to rigidity ,stresses and crack width ,all experimental results could meet the relevant specifica-tions ,and can promote the use of pre-tensioned pre-casted U-beam in the future .
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