曲线连续箱梁桥病害分析及加固措施

Disease Analysis and Reinforcement Measures of Curved Continuous Box-girder Bridge

由于受到弯曲、剪切、扭转的共同作用,常导致曲线连续箱梁桥支座脱空、腹板和固结墩开裂等病害。以某匝道桥为例,分析了其桥梁病害形成的原因,采取增大支座间距和增加箱梁腹板厚度等加固措施,有效改善了该曲线箱梁桥的承载力和抗倾覆能力。最后,通过桥梁荷载试验验证了该加固措施效果良好。

Because of bending,shear and torsion of the joint action,the curved continuous box-girder bridge is often caused by the disease. The diseases include the bearing cavity,web cracking and pier cracking. In this paper,the engineering diseases of a curved bridge is analyzed. By increasing the distance of the supports and increasing the thickness of the box-girder web,the bearing capacity and antioverturning ability of the bridge are effectively improved. Finally,the bridge load test proves that the reinforcement measures have good effect.