竖向荷载作用下群桩沉降的一种计算方法

针对桩基设计理论中群桩基础沉降计算这一难题,提出了一种群桩沉降的计算方法.该方法以荷载传递法计算自身桩顶荷载作用下的沉降,根据剪切位移理论考虑群桩之间的相互影响,对群桩位移影响系数进行了修正,进而求得了邻桩桩顶荷载作用下对其产生的沉降,在考虑各桩的存在引起位移折减后将其迭加,得出了一种群桩沉降的计算方法.通过与已有模型桩基试验结果进行对比,结果表明:理论计算值与实测值吻合较好.

Calculation Method of Pile Group Settlement under the Action of Vertical Load

Aiming at the difficult problem of settlement of group piles in design of pile foundation, an approach to the calculation of group pile settlement is presented. This approach calculates the settlement based on the load transfer method under itself working load of pile top, according to the shear displacement theory and taking into account the interaction of group piles, it modifies the displacement-influence factor,then the settlement under adjacent pile working load on the top is calculgted,a calculation of the group pile settlement by considering the reduction effect caused by the existence of piles is obtained. Through comparison with those measured from the model test of piles foundations, the results indicate the theory calculations coincide with test results.