箱梁“开刀手术”对其承载力影响的试验研究

预应力箱梁施工过程中，有几片箱梁部分波纹管堵塞，采取凿洞开孔的开刀手术处理。为判断处理后的箱梁是否符合设计要求，决定对箱梁进行现场静力荷载试验，主要测试荷载作用下箱梁的应变、挠度、残余变形等。经过试验检验，箱梁的强度、刚度等均符合规范要求，由此可得出结论：箱梁开刀手术对梁的承载力影响不大，可以正常使用。

The Study of Effects for Box Girder's "Surgical Operation" on It's Bearing Capacity

In the box girder construction process, several pieces of box girder＇ s part of the corrugated tube appeared blocking phenomenon ,then they were take ＂surgical operation＂ treatment, namely chiseled to opened holes. To judge whether the box gird- ers after treatment are in accordance with the design requirement, they decided to conducted the static loading experiment of the box girders. The experiment mainly test the strain, deflection and residual deformation, etc. under the loads about the box gird- ers. The experiment＇ s results shows that the box girders＇ strength, stiffness all conform to the standard. We can draw a conclu- sion from the experiment：the ＂surgical operation＂ has not effected the bearing capacity, the box girders can be normal used.