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桩的水平位移值易量测且结果可靠,因而可根据桩的实测位移值,运用位移反演分析方法对桩的受力特性进行分析。本文对桩的最终位移的构成进行了系统分析,而后运用最小二乘法原理,找到了相应的函数,使位移反演值与实测值之间的误差最小。通过对该函数的求解,得出了桩身各截面的水平位移、转角、弯矩和剪力等内力。最后将该方法运用于实例中,计算结果表明:反演值和“实测值”吻合程度较好,说明该方法作为桩的受力分析的理论方法是可行、可靠的。
The horizontal displacement of the pile is easily measurable and the result is reliable. Therefore, according to the measured displacement of the pile, the force response characteristics of the pile can be analyzed by displacement inversion analysis. In this paper, the final displacement of the pile is systematically analyzed, and then the least square method is used to find the corresponding function, which minimizes the error between the displacement inversion value and the measured value. Through the solution of this function, the internal forces of horizontal displacement, corner, moment and shear of each section of pile body are obtained. Finally, the method is applied to the example. The calculation results show that the inversion value is in good agreement with the “measured value”, which shows that this method is feasible and reliable as a theoretical method of stress analysis of pile.