In recent years, with the continuous increase of traffic flow, overloading, and heavy vehicles, the operation of single column bridge piers has led to beam torsion and deformation, uneven force distribution and detachment of bearings, endangering bridge safety, and even causing safety accidents such as bridge overturning, resulting in significant loss of life and property.

Under overloading and eccentric loading, single column pier bridges are prone to a decrease in their ability to resist overturning. However, overloading has no upper limit, and the amount of overloading cannot be used as a basis for design load values and anti overturning calculations. One thing must be clear: overloading is illegal, and it is not only a killer of single column pier bridges, but also a killer of road surfaces, all bridge structures, and traffic safety.

Reinforcement of single column pier bridge

Option 1: Add pier columns and supports

By using techniques such as pile driving, pouring concrete, and adding supports, single supports are replaced with multiple supports to enhance the torsional resistance of the middle pier of the main beam and meet the requirements of anti overturning reinforcement. In addition, by taking a series of measures, such as increasing pile columns and increasing the cross-section of pier columns, the overall strength of the middle pier can be improved to adapt to the increase in internal forces of the pier body after changing the support method.

Option 2: Install anti pull restraint devices

By using techniques such as planting anchor bolts and sticking steel, anti pull restraint devices are added to the edge piers to enhance the anti overturning performance of the bridge, in order to avoid overturning and overturning caused by the detachment of edge supports.

Option 3: Replace the covered beam with multiple supports

Add a cover beam at the top of the single column pier, changing the single support to multiple supports, in order to enhance the structural resistance to torsional deformation.

Option 4: Single pier reinforcement

The original design of a single column pier with a bearing platform was enhanced by techniques such as planting reinforcement, pouring concrete, and adding supports to increase the cross-section and support points of the original column piers, thereby enhancing the overall anti overturning ability of the bridge and the strength of the column piers.

Option 5: Add cover beams to increase the spacing between supports

By using techniques such as planting reinforcement, pouring concrete, and adding supports, the end crossbeam and cover beam are extended at the edge piers. If necessary, cover beams need to be added to widen the spacing between edge supports and enhance the overall anti overturning performance of the bridge structure.