桩基有限元法、静力法和经验法对比研究

以某工程实际的层状地基为例,用静力法、经验法和桩基有限元法分别研究了在不同桩长、桩径和桩径比情况下单桩极限承载力的变化关系。结果表明,当桩长L<60m时,三种方法的计算值偏差较大;当桩长L>60m时,三者的计算值偏差较小,可用静力法和经验法代替繁琐的有限元法来计算桩的极限荷载,同时也能保证桩基的经济合理性。

A Contrast Research on Finite Element Method, Static Method,and Empirical Method

With the real stratified foundation of an engineering works as an example,the static method,empirical method and pile foundation finite element method are used to study the varying relations of ultimate bearing capacity of single pile under the different conditions of the pile length, pile radius and the ratio of pile length to radiu. The results indicate that when the pile length is smaller than 60 m(L<60 m), the deviation of calculation values by three methods is large, while when the pile length is over 60 m(L>60 m), the deviation of calculation values by three methods is small. Accordingly, the static method and empirical method rather than tedious finite element method can be used to calculate the pile ultimate loading capacity and to ensure the economic rationality of the pile foundation at the same time.