In the construction of urban elevated bridge,the cave has extremely influenced the security and stability of viaduct pile foundation in urban area,it has great significance to research karst cave treatment for pile foundation construction.General treatment methods were elaborated for pile foundation in karst cave,and summarized the specific construction technology for cave.As an example,the treatment scheme for pile foundation in the karst cave was introduced in construction for an elevated bridge in Wuhan,which was put forward to improve the practical solution to the karst cave and the construction technology of steel casing follow-up was also introduced,it would provides reference for other similar engineering projects.%城市高架桥施工中,城区溶洞的存在对高架桥桩基的安全稳定性影响极大,研究溶洞处治方法对桩基施工具有重要意义.阐述了桩基溶洞处治方法的研究状态,总结了溶洞处理的具体施工技术.以武汉市某高架桥桥梁桩基施工中溶洞处理方案为例,提出了完善实际的溶洞处理方案,重点介绍了钢护筒跟进的施工技术,为其他类似工程提供参考.
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