On the base of strain site tests of a continuous box-girder on urban railway transit line in Beijing,a statistical regress method was used to analyze the time-dependent law of deflection.

• 以北京城市轻轨线某预应力混凝土高架桥连续箱梁的实桥应变观测试验为基础,利用实验数据进行回归分析,阐述了梁体时效变形的发展规律及其对轻轨道路二期施工的影响。