土体侧移引起桥梁结构损伤的加固对策

Strengthening Strategies for Bridge Structure Damage Induced by Soil Lateral Movement

桥梁受滑坡体影响或桥侧堆载时土体的沉降和侧向位移对桥梁桩基受力会产生较大的影响。桩侧土在侧移土体的作用下产生水平位移并对桩基产生挤压,导致桩基发生水平位移并产生挠曲变形,进而影响到桥墩和上部结构产生一系列变位与损伤。根据结构损伤的程度,采取抗滑桩配合设置变形缝或增设排架桩,加固效果良好。

In the case that a bridge is influenced by nearby landslide body or situated close to a fill,the soil settlement and lateral movement will exert a large influence on bridge piles.Under the action of the laterally moving soil,the soil adjacent to the piles generates a horizontal displacement and thus extrudes the piles,forcing them to deflect horizontally,and further inducing the deformation and damage of the piers and the superstructure.According to the damage extent,anti-slide piles along with deformation joints,or pile bents are used to strengthen the structure.Additionally,the strengthening strategies are proved to be effective through numerical calculations and the following inspections.