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挤扩支盘桩具有承载力高、沉降小、施工机具简单等优点。针对我国沿海地区软土地基,开展了挤扩支盘桩的竖向抗压、抗拔和水平静载荷试验,得到了极限抗压、抗拔和水平承载力。通过试桩的桩身内力测试,得到桩身轴力的分布规律,研究了挤扩支盘桩的荷载传递机理和承载性能。试验结果表明,挤扩支盘桩的竖向承载力比普通直孔桩有较大提高,具有广阔的应用前景。
Squeezed expanded branch pile with high bearing capacity, small settlement, construction machinery and other advantages. In view of the soft soil foundations in the coastal areas of China, the vertical compression, lifting and horizontal static load tests of the squeezed branch pile are carried out. The ultimate compressive strength, pull-out resistance and horizontal bearing capacity are obtained. Through the pile internal force test of test pile, the distribution law of the axial force of the pile body is obtained, and the load transfer mechanism and bearing capacity of the pile are studied. The test results show that the vertical bearing capacity of the squeezed branch pile is much higher than that of ordinary straight piles, which has a broad application prospect.