论文部分内容阅读
针对在桥梁基桩沉降计算中采用基于平滑曲线提出的桩土界面非线性模型,计算复杂,难以得到解析解,而利用改进后的折线模型计算精确度得不到保证的问题,在荷载传递法的基础上,引入有限差分思想,将桩身分段,分段范围内轴力不变,将桩身位移控制方程由二阶常微分方程转化为代数返程求解,从而得到了利用桩土接触面双曲线模型计算基桩沉降数值方法,最后利用某实际工程的实测P-s曲线对该文方法进行了验证,计算结果与实测结果吻合良好,由此证明该文方法可为工程实际提供有益参考。
Aiming at the problem that the nonlinear model of pile-soil interface based on the smooth curve is used in the settlement calculation of bridge foundation pile, the calculation is complicated and the analytical solution is difficult to be obtained. However, the calculation accuracy of the improved broken line model can not be guaranteed. Based on the theory of finite difference, the idea of finite difference is introduced, the axial force of the pile body and the section are kept unchanged, and the displacement control equation of the pile body is transformed from the second-order ordinary differential equation to the algebraic return solution. Curve model to calculate the pile foundation settlement numerical method. At last, the actual Ps curve of the actual project is used to verify the method. The calculated results are in good agreement with the measured results. It proves that the method can provide useful reference for engineering practice.