复杂岩溶区高速公路桥梁桩基溶洞处理技术研究

Research on Treatment Technology of Karst Cave of Pile Foundation of Expressway Bridge in Complicated Karst Area

结合广东省佛清从高速公路北段东升互通桥梁桩基施工实例,系统阐述了复杂岩溶区桩基施工的常见问题以及相应的处理措施,并结合现场实际情况、施工成本和施工质量等提出了"黏土片石回填+钢护筒跟进"的溶洞处理技术,为类似复杂岩溶地质条件下的高速公路桥梁桩基溶洞处理提供了现场经验参考.

This paper systematically describes the common problems of pile foundation construction in complex karst areas and corresponding treatment measures in combination with the example of pile foundation construction of Dongsheng Interchange Bridge in the northern section of the Fo-Qing-Cong Expressway in Guangdong Province,and proposes the"clay flakes backfill+steel casing follow-up"karst cave treatment technology based on the actual situation on site,construction cost and construction quality,which provides on-site experience reference for the treatment of highway bridge pile foundation karst cave under similar complex karst geology.