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宁德宁连高速公路A1合同段增坂枢纽互通YK0+312.5~+660段临近既有高速公路,原设计全部采用CFG桩复合地基进行软基处理存在高空坠物等安全隐患。本文在此基础上采用经验、计算,基于工程特点及环境条件,优化提出高压旋喷桩联合CFG桩复合地基,兼顾安全与经济:靠近既有高速公路侧采用高压旋喷桩,新建道路侧仍采用CFG桩,实践结果表明本文的优化方案处理效果可靠、施工过程安全,可以为类似特殊部位的地基处理提供参考。
Ningde Ninglian Expressway A1 Contract Section Zensaka Interchange YK0 + 312.5 ~ +660 Adjacent to the existing expressway, the original design of all CFG pile composite foundation for soft foundation processing there is potential safety problems such as falling objects. Based on this, this paper uses experience and calculation, based on engineering characteristics and environmental conditions, puts forward the optimization of high pressure rotary jet grouting combined with CFG pile composite foundation, both safety and economy: near the existing highway side by high pressure rotary jet grouting pile, The CFG pile is used. The results show that the optimized scheme in this paper is reliable and the construction process is safe. It can provide reference for foundation treatment similar to special parts.