对既有桥梁做工程检测时 ,有时需在桥墩壁上钻孔以便搭设工作平台。对于空心薄壁墩 ,钻孔较多可能会对墩截面造成局部削弱 ,结构安全性及工作性能受到影响。运用有限元法对墩壁钻孔后的平面应力进行了弹性分析 ,按离散裂缝模式对孔周局部损伤作了分析 ,得出结论 ,为类似工程提供参考 For existing bridges to do engineering inspection, it is sometimes necessary to drill holes in the pier wall in order to build a working platform. For hollow thin-walled piers, more holes may cause partial weakening of the pier section, which will affect structural safety and workability. The finite element method was used to analyze the plane stress of the pier wall after drilling, and the local damage of the hole was analyzed according to the discrete fracture mode. The conclusion is drawn that it can provide references for similar projects