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为将准静荷载试验法中动态荷载-沉降曲线转换为静态荷载-沉降曲线,并尽量与工程实际相接近,对已有分析方法进行了适用性探讨和分析比较,在原有理论基础上提出了新的C模型分析方法,将整个试验过程中桩-土系统的阻尼系数按照理论前提随时间变化分为3段,各段分别计算,最后组合成随时间变化的阻尼系数曲线。然后根据单质点模型的平衡方程计算出静态P-S曲线。借助大型计算软件MATLAB,对具体工程实例分别采用已有方法与C模型法分别进行编程计算。计算结果表明:C模型法计算出的静态P-S曲线处于由卸载点法和起始刚度法得出的静态曲线之间,该方法能较合理地分析准静载荷试验法的荷载-沉降曲线。
In order to convert the dynamic load-settlement curve to the static load-settlement curve in the quasi-static load test and try to be close to the actual project, the applicability of the existing analysis methods is discussed and compared. Based on the original theory, The new C model analysis method divides the damping coefficient of the pile-soil system into three sections according to the theoretical premise with time, and calculates the damping coefficient curves of the pile-soil system as a function of time. Then the static P-S curve is calculated according to the equilibrium equation of the elemental point model. With the help of large-scale calculation software MATLAB, the specific engineering examples are separately programmed and calculated by the C model respectively. The calculation results show that the static P-S curve calculated by C model method is between the static curves obtained by unloading point method and initial stiffness method. This method can reasonably analyze the load-settlement curve of quasi-static load test.