不同形状盘体组合对支盘桩承载性状影响研究

Research on the bearing capacity of branch piles with different plate combinations

设计了四组双盘支盘桩室内模型试验,以研究不同土层中不同形状盘体组合对桩承载性能的影响.根据试验结果可知:支盘桩的盘体直径相同而盘底倾角不同时其承载力是不同的,多盘支盘桩设在不同土体中的盘体其盘底倾角存在最优角度组合,越接近最优角度组合,各盘体底部土体压力差越小,桩周土的压力分布越均匀,也越能充分发挥桩周土的承载性能,多盘支盘桩的承载力也越高.因此在多支盘桩设计时应重视设置在不同土体中各盘的形状变化对承载性能的影响,尽可能采用最优的不同形状盘体组合,以发挥支盘桩的最佳承载性能.

In order to study the influence of the shape of composite plates on the bearing performance of branch piles in different soil layers, four sets of laboratory model tests are designed. The e plates have xpe the rimental results show that the bearing capacity In di is different fferent soil when the branch layers, there is an optimal combination of angles. When the optimal combination of angles is approached, the bearing capacity is higher, the soil pressure difference at the bottom is smaller, the pressure distribution in the soil around the pile is more uniform, and the bearing capacity of piles more fully developed. Therefore, more attention should be paid to the influence of the plate shape on the load bearing performance in the practical design of branch piles. The optimal combination of different plate shapes is adopted as possible to achieve the best hearing performance of branch piles.