According to the analysis and research on physical parameter,collateral resistance,tip resistance,the paper establishes the empirical correlation among the blow count of SPT,collateral resistance,and tip resistance,points out the results through the blow count SPT estimation is highly accurate,so it is feasible in projects.%通过对物性参数与侧阻力、端阻力关系的分析研究,建立了标贯击数与侧阻力、端阻力的经验关系式,经过分析验证,指出利用标贯击数估算单桩极限承载力可获得较高的精确度,应用到实际工程中是可行的。
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