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依托津滨高速改扩建工程,计算了管桩复合地基的地基承载力,重点对太沙基理论公式进行推导验算,并对太沙基理论公式在管桩复合基础应用中做了修正,通过对典型单元体的分析,推导了表征刚性基础下复合地基性状的桩土应力模型,最后将工程设计方案和本文方法分析的结果进行对比,二者基本一致,说明本文方法能较好反映天津地区管桩处理地基的工作性状。进一步补充了管桩在复合地基中的应用,并对此模型做进一步展望。
Relying on the Jinbin high-speed reconstruction project, calculated the foundation bearing capacity of the composite foundation of pipe-pile, deduced and calculated the theory formula of Tai Sha Ji, and corrected the application of the Taishaji formula in the application of composite foundation of pipe pile. Typical unit body, deduced the pile-soil stress model which characterizes the behavior of the composite foundation under the rigid foundation. Finally, the comparison between the engineering design scheme and the result of the method in this paper is basically the same, which shows that the method in this paper can better reflect the pipe Pile processing foundation working traits. Further supplementing the application of pipe piles in composite foundation and making a further prospect of the model.