(五邑大学土木工程系  江门 529020)
【提要】  将刚性基础基底反力的计算方法用于桩位偏差时各桩顶竖向力的计算。以四桩桩基与三桩桩基为例，分别计算了其中一桩桩位发生偏差时各桩竖向力的数值。计算结果表明，当其中一根桩的桩位偏差在规范规定范围以内时，各桩竖向力的变化大致在10%以内；当其中一根桩的桩位偏差达一倍桩径时，对四桩桩基，基桩竖向力变化最大可达30%；对三桩桩基，最大可达60%。
【关键词】  桩位偏差  刚性基础  竖向力  桩基础
Analysis of the Vertical Force Change in the Pile Foundation Induced by the Error of a Pile Position/Dong Qinghua(Department of Civil Engineering,Wuyi University,Jiangmen 529020,China)
Abstract:Calculation method of foundation pressure of rigid foundation is used to calculate the change of vertical force on pile top induced by the error of a pile position.The change of vertical force on every pile in fourpile or threepile foundation is calculated separately when any piles position emerges the error.The results show that,whether fourpile or threepile foundation,if the error of a pile position is within the limit set by the code,the change of vertical force on every pile is within about 10%;if the error of a pile position equals to a piles diameter,the maximum change of the vertical force on the pile is about 30% for fourpile foundation and about 60% for threepile foundation.
Keywords:error of a pile position;rigid foundation;vertical force;pile foundation