临近桩基础吊装作业的影响分析

Impact of hoisting operation on adjacent pile foundation

针对吊装作业引起的超载对临近桩基础的影响问题,进行吊装作业稳定性和桩基础受力分析。采用经验公式计算吊装稳定性,并对桩身受力情况进行有限元分析。结果表明,吊装作业稳定性系数、桩身受力、桩顶水平和竖向位移均满足相关要求;吊装工况下荷载大于设计值,桩基础受力和位移虽然符合规范要求,但内力和位移明显增大,应复核超载对结构安全的影响。

Regarding the problem that the overloading caused by hoisting operation can affect the adjacent pile foundation,this paper analyzes the hoisting operation s stability and pile foundation stress.The paper uses the empirical formula to calculate the hoisting stability and adopts the finite element method to analyze pile body stress.The results reveal that the stability coefficient of hoisting operation,pile body stress,and horizontal and vertical displacements of pile top all meet relevant requirements.The overloading exceeds the design value under the hoisting operation condition.Although the stress and displacement of the pile foundation meet the code requirements,the internal force and displacement increase significantly.Therefore,the impact of overloading on structural safety should be rechecked.