排距对双排桩结构体系性状影响的数值分析

结合工程实例,利用FLAC3D数值差分计算程序对深基坑双排桩支护结构的弯矩和变形分布特征进行研究。重点分析前后桩排距的变化对结构体系内力及变形的影响。研究表明:随着双排桩桩距的增大,前后桩水平位移逐渐减少,但是超过一定数值后,减小的趋势减缓;后排桩的弯矩逐渐减小,而前排桩的弯矩逐渐增加,说明二者很好的协同作用。为双排桩的优化设计提供一种参考。

Numerical Analysis on the Effect of Row Distance on Double-Row Piles

With practical projects as examples,numerical difference computing process of FLAC3D was used to investigate the distribution characterisitcs of the bending moment and deformation in double-row piles support structural system.Focus was put on analysis of the influence of pile distance on the internal forces and deformation of architecuture.The research results show that,with increasing distance of double pile,the horizontal displacement of piles gradually decreased and then flattened after a certain value;bending moment of renr piles decreased,while that of the front pile,gradually increased,indicating a very good synergy between the two rows.The paper puts forward reasonable suggestions to the optimization of dual piles-in-row support system.