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逆作复合桩箱基础通过桩与沉箱共同承担上部荷载,其中钢管桩采取逆作法施工,即先设置沉箱,然后将钢管桩打入沉箱的预留孔中并入土一定的深度。沉箱与钢管桩之间通过混凝土粘结在一起,二者之间的握裹效果决定结构施工的成败。利用有限元软件An-sys进行二者之间的握裹力分析,同时进行模型试验。通过理论计算与试验相结合的方式,探讨钢管桩与沉箱之间的结合特性,为类似结构设计施工提供参考。
The counter-acting composite pile box foundation shares the upper load through the pile and the caisson. The steel pipe pile adopts the reverse construction method, that is, the caisson is set first, and then the steel pipe pile is driven into the reserved hole of the caisson and dug into the soil to a certain depth. The caissons and steel pipe piles are bonded together by concrete, and the effect of the grasping between them determines the success or failure of the structure construction. The finite element software An-sys was used to carry out the analysis of the bond between the two, and the model test was carried out at the same time. Through the combination of theoretical calculation and experiment, the coupling characteristics between steel pipe piles and caissons are discussed, providing references for the design and construction of similar structures.