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利用ABAQUS有限元软件,以现场试验为原型,建立数值分析模型,对群桩原位试验进行模拟,对比了单向水平荷载作用下单桩和群桩的水平荷载位移曲线,验证了数值模型和计算参数的有效性,然后利用该土层和桩体信息,研究了在粘土中的1×2群桩、1×3群桩、2×2群桩和3×3群桩在不同方向水平荷载作用下的响应。研究结果表明,群桩中由于桩与桩之间相互影响,导致桩的水平承载力降低,其中前排桩对后排桩的影响最大,后排桩对前排桩的影响次之,而同排桩之间的影响最弱;当沿不同水平方向进行加载时,各单桩所分配到的水平力变化明显,主要取决于其所处的桩位和其他桩对该桩产生的“遮蔽效应”。
Using ABAQUS finite element software and field test as the prototype, the numerical analysis model was established to simulate the pile group in-situ test. The horizontal load displacement curves of single pile and pile group under one-way horizontal load were contrasted, and the numerical model and The validity of the parameters was calculated. Based on the information of the soil layer and pile, the effects of horizontal load of 1 × 2 groups of pile, 1 × 3 groups of pile, 2 × 2 groups of pile and 3 × 3 groups of pile in different directions Response under action. The results show that the horizontal bearing capacity of piles is reduced due to the interaction between piles and piles. Among them, the front piles have the most influence on the back piles, the back piles have the second strongest effect on the front piles, and the same The effect between row piles is the weakest. When loading along different horizontal directions, the horizontal force distributed by each single piles changes obviously, which mainly depends on the “shadow” of piles and other piles effect".