板桩弹性线法的有限元计算方法

Finite Element Method of Sheet Pile Elastic Line Method

弹性线法计算板桩墙内力时存在应用范围狭窄、采用图解法、工程实际应用较繁琐、计算精度较低的问题。文章结合弹性线法的理论原理,通过有限元法计算其精确解,克服了图解法人为因素的影响以及弹性线法采用弯矩控制条件代替变形条件的误差;计算中可以考虑板桩刚度、锚碇点位移对板桩墙求解的影响;扩大了计算范围,可用于多板桩墙的计算。但由于按照规范仍将土压力与板桩墙分离计算,此计算方法仍不能反映墙-土相互作用。

Using elastic-line method to calculate the internal force of sheet pile walls that exists the problems of narrow application range, graphically solving method, quite tedious in practical application, and low calculation accuracy. In combination with the theoretical principles of elastic-line method, through finite element method to calculate its exact solution, to overcome the impact of graphical method by artificial factor, and the error for using bending control condition instead of deformation control condition by the elastic-line method ; the impacts of sheet pile stiffness and anchor point displacement for solving sheet pile walls could be considered during the calculation ; the calculation scope was expanded to calculate multi-sheet pile walls; but due to the soil pressure still be calculated according to specification to be separate from sheet-pile wall, so this calculation method still can not reflect the interaction between wall and soil.