超载作用下独柱墩桥梁抗倾覆稳定性分析与加固研究

Study on Anti Overturning Stability Analysis and Reinforcement of Single Column Piers Under Overloading

在重型车辆通过独柱墩桥梁时,易引起箱梁上构横向倾覆。针对广东某高速公路1年内超载车辆分析,确定该段内桥梁汽车荷载效应,划分切合实际的荷载组合,分析验算超载下独柱墩桥梁整体横向抗倾覆性能,并根据验算结果及实际情况,研究独柱墩连续箱梁桥增设支撑体系、设置抗拔销的可行性与合理性,对该类桥的抗倾覆设计提出加固方案。

The main reason for the overturning accident of continuous box girder bridge is that when the heavy vehicle passes through the single pier bridge,it is easy to cause the box girder structure to overturn.Based on the analysis of overloaded vehiclesin aGuangdonghighway,the load effect of bridges in the section is determined,the actual load combinations is divided,and thewhole transverse overturning properties ofsingle column bridge under overloading are analyzed.According to the calculation result and the situation,the feasibility and rationality of the additional support system for the continuous column box bridge are studied,and the feasible reinforcement scheme is put forward for the overturning design of the bridge.