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根据5根大直径灌注桩现场抗拔静载试验和应力测试结果,分析了嵌岩桩荷载传递性状和嵌岩段摩阻力发挥过程一些特性,得到抗拔桩的桩周土层抗拔系数以及Q–s曲线呈缓变形的抗拔桩极限承载力取值方法。结果表明抗拔桩的曲线形状与持力层岩石风化程度和桩的嵌岩深度有关。同时根据嵌岩段摩阻力发挥过程特点,进一步探讨了影响嵌岩段摩阻力发挥值主要因素。
According to the results of static pull-out test and stress test of 5 large-diameter cast-in-situ cast-in-situ piles, the load transfer characteristics of rock-filled piles and some characteristics of frictional resistance of embedded rock sections were analyzed. Q-s curve is slowly changing the ultimate bearing capacity of pile method. The results show that the curve shape of the uplift piles is related to the rock weathering of the bearing layer and the socketed depth of the pile. At the same time, according to the frictional resistance of embedded rock, the main factors influencing the frictional resistance of embedded rock are further explored.