微桩群复合地基水闸闸室结构有限元分析

FEM analysis on sluice structure with composite foundation of micro-piles

借助三维有限元软件ABAQUS对软基上的焦土港闸进行了计算,分析研究了不同闸内外水位情况下微桩群复合地基以及闸室结构的应力应变情况。结果表明,微桩群显著降低了地基沉降并提高了地基承载力;闸室位移及应力均较小,水闸处于正常状态;水闸荷载由桩及桩间土共同承担,若在设计中考虑桩间土所承担的荷载,可以降低工程投资。研究结论对软基上的水闸设计有参考价值。

The strain and stress of the micro - piles composite foundation and the sluice chamber structure of Jiaotugang sluice under different outside and inside water levels are calculated and analyzed by finite element software ABAQUS. The results show that the micro - piles lower the settlement and increase the bearing capacity of the foundation. The relative small displacement and stress of the sluice chamber show that the sluice structure is in a normal working state. As the water load is shared by both piles and the surrounding soil of piles, the engineering investment could he reduced if the soil hearing capacity is considered in the design of foundation. The research results have valuable reference to design of sluice on soft soil foundation.