CAJ | 학술논문

针对目前群桩基础水平承载特性研究落后于工程应用的现状，采用数值分析的方法研究了软土地基管桩群桩基础在水平荷载作用下的承载特性。计算结果表明：群桩承受水平荷载时，承台前土体压缩变形范围明显小于承台后受拉变形范围；随着桩间距的增加，群桩侧向影响范围逐渐减小，而深度影响范围和桩顶位置处弯矩逐渐增大；相同水平荷载作用下前桩最大弯矩值明显大于后桩，前排桩桩身剪力零点位置高于后桩；当桩距达到6～8倍桩径时，群桩效应明显降低。
침대목전군장기출수평승재특성연구락후우공정응용적현상，채용수치분석적방법연구료연토지기관장군장기출재수평하재작용하적승재특성。계산결과표명：군장승수수평하재시，승태전토체압축변형범위명현소우승태후수랍변형범위；수착장간거적증가，군장측향영향범위축점감소，이심도영향범위화장정위치처만구축점증대；상동수평하재작용하전장최대만구치명현대우후장，전배장장신전력영점위치고우후장；당장거체도6～8배장경시，군장효응명현강저。
As current studies on horizontal load-bearing characteristics of group of piles can not yet meet the engineering reality,the paper takes the foundation of pipe pile group that locates on soft soil base as the study object and applies numerical simulation in its research. T he results indicate that as horizontal loading imposes,soil in front of the bearing platform deforms within an evidently more limited scope than that behind the platform. As the pile interval goes up,the lateral scope of influence falls gradually,while the vertical scope of influence and the bending moment at pile tip rise. U nder equal horizontal loading,the maximum bending moment of the front pile largely exceeds that of the back pile,as the null point of shear force locates higher on the front pile than that of the back pile. As the pile interval raises to 6 ~8 times of the pile diameter,group of piles effect is evidently weakened.