平寨特大桥是沪瑞国道(贵州境)镇宁至胜境关高速公路的控制性工程之一,该桥的基础为桩基础,桩址位于贵州省典型的岩溶发育地区,地质情况复杂,桥梁的基础施工难度很大。结合工程实际,采用人工开挖方式,合理结合钻爆施工技术,有效提高了工程进度,并降低了工程风险及成本,文章详细介绍了该桥基础的施工关键技术及特殊地质情况的处理,为今后类似工程的施工提供了一定的参考。 Pingzhai Bridge is one of the controlled projects of Zhenning-Shengjinguan Expressway on Shanghai-Ruih-Guo Road (Guizhou). The foundation of the bridge is pile foundation. The pile site is located in the typical karst development area of ​​Guizhou Province. The geological conditions are complex, The foundation construction is very difficult. Combined with engineering practice, using artificial excavation method and reasonable combination of drilling and blasting construction technology effectively improve the progress of the project and reduce the risk and cost of the project. The paper introduces in detail the construction of key technologies and special geological conditions of the bridge foundation for The construction of similar projects in the future provides some reference.