CAJ | 학술논문

通过离心模型试验和数值模拟手段研究不同运动方向下桩间距为3倍桩径的两桩间相互作用规律，并分析桩间距、土体内摩擦角以及不同桩头位移对前、后桩折减系数的影响。通过分析表明，沿不同方向运动的两桩间存在明显的桩-土-桩相互作用，该相互作用效果与桩所在位置有明显关系，前桩的相互作用折减系数明显大于于后桩；当桩间距在3～5倍桩径范围内，前、后桩折减系数随桩间距近似线性变化；砂土内摩察角对折减系数的影响可以忽略。另外，不同加载方式对两桩的折减系数也有一定影响。
통과리심모형시험화수치모의수단연구불동운동방향하장간거위3배장경적량장간상호작용규률，병분석장간거、토체내마찰각이급불동장두위이대전、후장절감계수적영향。통과분석표명，연불동방향운동적량장간존재명현적장-토-장상호작용，해상호작용효과여장소재위치유명현관계，전장적상호작용절감계수명현대우우후장；당장간거재3～5배장경범위내，전、후장절감계수수장간거근사선성변화；사토내마찰각대절감계수적영향가이홀략。령외，불동가재방식대량장적절감계수야유일정영향。
Both centrifuge modeling and numerical simulation are employed to investigate pile-soil-pile interaction between two adjacent piles with pile spacing of 3 times pile diameter moving in different directions. The influence of pile spacing,internal friction angle of sand,and different displacements of the leading and trailing piles on reduction factor are also analyzed based on numerical results. It is found that pile-soil-pile interaction is significant in two adjacent piles undergoing different movement directions. The reduction factor of the trail pile is not larger than that of the leading one in the investigated two cases. It is also found that reduction factors for the leading and trail piles almost linearly increase as pile spacing varies from 3 times pile diameter to 5 times and almost keep constant with internal friction angle. In addition,loading mode has certain effect on reduction factors of the two piles.