水闸底板结构的桩基布置不同方案对比

Comparison of different schemes for pile foundation layout of sluice floor structure

为研究水闸底板结构内力分布和不同桩基加固方式效果差异,本文利用有限元软件建立了三维水闸模型,并通过理论计算结果对比验证了该模型的合理有效性。基于此,分析了4种工况下水闸的底板弯矩、底板沉降和桩端阻力情况。结果表明:三种通过地基处理的工况相对于自然工况,底板弯矩和沉降均出现不同程度的减小,通过桩基对地基进行加固对水闸结构内力减缓作用明显,减小了结构负载,增加了安全性能。通过对底板弯矩分布和沉降控制方面以及桩端阻力大小情况对比,工况4采用边密中疏的布桩方式加固效果最好。

In order to study the internal force distribution of the sluice floor structure and the effect of different pile foundation reinforcement methods, this paper established a three-dimensional sluice model using finite element software, and verified the reasonable validity of the model by comparing the theoretical calculation results. Based on this, the floor bending moment, floor settlement and pile tip resistance of the sluice under four working conditions were analyzed. The results show that compared with the natural working conditions, the bending moment and settlement of the bottom plate are reduced in different degrees in the three working conditions through foundation treatment. The reinforcement of the foundation by the pile foundation has obvious effect on mitigating the internal force of the sluice structure, reducing the structural load and increasing the safety performance.By comparing the distribution of the bending moment of the bottom plate, the settlement control and the resistance of the pile end, the reinforcement effect of the pile arrangement with dense and sparse edges is the best in case 4.