岩溶地区桩基施工几种特殊处理措施

Special Measures for Ground Treatment in Construction of Pile Foundation in Karst Area

结合广州新国际机场高速公路北延线花山互通立交桥桩基施工,总结和探索在溶洞发育地区桩基施工技术经验。针对岩石倾斜大、岩层裂隙严重、串珠状溶洞和炭质页岩无灰岩等不同地质情况和不利因素,有针对性地采取不同的技术处理措施和制订逐桩施工方案,实践检验是成功的。

Incorporated with construction of the pile foundation for Huashan Interchange on the north extension of the expressway to the new international airport in Guangzhou, the technique and experience in construction of the pile foundation in the karst developing area are explored and summed up. To cope with different geological conditions and unfavorable factors such as great inclination of the rock, serious gaps in the stratum, beaded karsts and carbonaceous shale without limestone, relevant measures are taken for technical treatment and construction pile by pile. It is proved successful in practice.