深厚软土地基水闸翼墙变位三维数值分析

3-D Numerical Analysis and Countermeasure of Abutment Wall Displacement in A Sluice Project on Deep Soft Soil Foundation

基于深厚软基水闸的设计实践,利用ABAQUS建立了水闸、翼墙、钻孔灌注桩和地基共同作用的三维有限元数值模型,研究了在填土影响下翼墙与水闸之间变形缝随时间的开展情况,并通过空箱岸墙工况的模拟计算,探讨了空箱岸墙控制翼墙变位的效果。数值分析表明,有限元模拟的变形缝发展过程与实际趋势基本相符。设置空箱岸墙过渡处理之后,水闸与翼墙之间的变形缝发展得到了明显的控制,合理的空箱岸墙宽度为0.8~1.0倍堤身高度。

Based on the design practice of the sluice building on a deep soft foundation, a three-dimensional finite element of a whole model including the sluice, the wing-wall, the bored piles and the soft foundation was proposed to investigate the displacement between the sluice and the wing-wall under the influence of the fillings along time. The investigation and numerical simulation of effect on the crack control un- der the empty container conditions were also explored. The results from the numerical analysis indicate that the displacement control effect is obvious in the empty container conditions. The reasonable width on the empty container is determined according to the analysis results.