考虑桩土相互作用的双排桩分析

本文在对双排桩现有计算模型进行分析的基础上,提出了一种新的考虑桩土相互作用的平面杆系有限元双排桩分析模型,将双排桩之间土视为薄压缩层,并以水平向弹簧模拟,可以考虑两排桩间土层分布变化、压缩性、桩间土加固等对双排桩相互作用的影响,避免对前后排桩土压力分布做出人为分配。利用这一模型研究了双排桩与土的相互作用问题,计算实例表明,在参数取值合理的情况下,可以取得满意的计算结果。

Analysis of double-row piles in consideration of the pile-soil interaction

Based on the current model of calculating double row piles, the new plane finite element model considering the pile soil interaction was presented in this paper. Soil between double row piles was regarded as a thin compressible layer and was simulated by a series of horizontal rings connecting the double row piles,so that the effects of the change of soil profile, compressibility and the treatment of soil between double row piles on the interaction between the double row piles could be considered in the analysis with no supposition of the sharing of total soil pressure between double row piles needed. The calculated results of the interaction of double row piles of an actual engineering project by the presented model showed that satisfactory result can be obtained with reasonable parameters applied in the model.