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为了深入研究DX桩在桥梁桩基中的应用,通过对某桥梁桩基的现场静载荷试验,结合多种测试手段,对DX桩承载力进行判定;测定桩身各断面的轴力,进而研究侧阻、盘阻和端阻的发展情况,分析DX桩的荷载传递规律。结果表明,在相同桩径和桩长情况下,DX桩的承载力及沉降明显优于直孔桩;承力盘分担了较大比例的荷载,自上而下发挥,对桩身轴力有很大的削弱作用。这样的荷载传递模式不仅对于承载力的提高有很大的帮助,同时能够有效的控制沉降,提高单方混凝土的承载力,更加经济、节能和环保。
In order to deeply study the application of DX pile in bridge pile foundation, the bearing capacity of DX pile is judged by the static load test of a bridge pile foundation combined with a variety of test methods; the axial force of each section of pile body is measured; Lateral resistance, disk resistance and end resistance development, analysis of DX pile load transfer law. The results show that under the same pile diameter and pile length, the bearing capacity and settlement of DX pile are obviously better than those of straight hole piles. The bearing plates share a large proportion of load and exert loads from top to bottom, Greatly impaired. Such load transfer mode is not only helpful for the improvement of bearing capacity, but also can effectively control the settlement and improve the bearing capacity of unilateral concrete, which is more economical, energy saving and environmental protection.