水池结构在刚性桩复合地基与复合桩基作用下的性状浅析

摘要

In this paper,finite element methods (FEM) was adopted to analyze the settlement,bottom slab and piles performances of water tanks which were using rigid-pile composite foundation with non-connected piles and composite pile-foundation with connected piles.Based on the practical case and parametric analyses,this paper emphasized on the similarities and differences of the two types for helping future designs.According to the case analysis,it shows that the water tanks settlement is close for the two types of foundation,however the pile behavior and bending moment distribution of bottom slabs is distinct.The pile top load is small and the bending moment of bottom slab is close to the type of elastic foundation beams for the rigid-pile composite foundation type,and the pile top load is large and bending moment distribution of slabs was close to the type of continuous beams for composite pile-foundation type.%本文采用有限元方法,对桩与底板脱开的刚性桩复合地基和桩与底板连接的复合桩基两种形式下的水池沉降、底板及桩基受力性状进行了研究.依托实际案例和参数分析,着重分析了这两种形式的相似点和区别点,以利于今后的工程设计.通过分析表明,两者所得到的池体沉降基本相近,但基桩受力及底板弯矩分布明显不同.当采用刚性桩复合地基时,桩顶反力较小,所产生的底板弯矩分布更接近于采用弹性地基梁所得的弯矩图;当采用复合桩基时,桩作为结构的一部分,桩顶荷载较大,底板弯矩分布更接近于连续梁产生的弯矩叠合底板整体弯曲变形所产生的弯矩.