地下水开采是导致地面不均匀沉降的重要因素之一,而地面不均匀沉降又会对桥梁结构造成较大的危害。通过离心模型试验研究了离心场中地基抽水对桥梁结构物的影响。在自主研制的离心场中地基抽水对结构物影响的模拟和测量系统基础上,测量了抽水过程中粉土地基中沉降的变化以及桥梁结构的变形分布规律,探讨了地面不均匀沉降对刚性桥梁、简支桥梁以及简支连续桥梁的影响规律。试验结果表明,水井抽水的初期非稳定渗流期是桥梁变形发展最快的阶段;减小桥垮长度以及桥面桥墩改用铰连接都可以使得桥面轴向应变减小;地基的水平位移会给刚性桥梁中部带来较大的变形。 Groundwater exploitation is one of the important factors leading to uneven ground settlement, and uneven ground settlement will cause great harm to the bridge structure. Centrifugal model tests have been carried out to study the effect of foundation pumping on the bridge structure in centrifugal field. Based on the simulation and measurement system of the influence of foundation pumping on the structure in the independently developed centrifugal field, the settlement of the silty foundation during the pumping process and the deformation and distribution of the bridge structure were measured. The effects of uneven settlement on the rigid bridge , Simply supported bridges and simply supported continuous bridges. The experimental results show that the initial instability period of well pumping is the fastest stage of bridge deformation. Reducing the length of bridge collapse and changing the bridge pier to the hinge joint can reduce the axial strain of bridge deck. The horizontal displacement of foundation To the rigid bridge in the middle of a larger deformation.