【摘要】 本文分析了两根钻孔灌注桩的原位试验资料,桩身内埋设了量测元件。桩的荷载传递试验结果表明:在桩端以上5倍桩径范围内,桩侧摩阻力的发挥与桩端力大小有关;粘土层的摩阻力充分发挥时所需要的极限位移值与土层的埋藏深度有关;桩端阻力发挥时所需要的桩位移,砂土约为桩径的3％,粘土为1.5％,均较魏锡克(A.S.Vesic,1970)报导的打入桩结果为小。更多还原

【Abstract】 In this paper is reported the result of test on two prototype bored piles instrumented with re-bar gauge and telltales, for determining the axial load Capacity, and also for load transfer behaviour studies.It has been shown that (1) within a distance of five diameters above pile end, mobilization of skin friction is related to the magnitude of end resistance in such way that increase in end resistance is accompanied by decrease in skin friction; (2) vertical displacement required for full developmeat of skin friction of a clay layer is related to the depth of embedment of the layer, this being smaller for deep layers; and (3) setllement of pile end for attaining full end resistance is about 0.03d for sand and 0.015d for stiff clay, where d is diameter of pile, which values are much smaller than those reported by Vesic (1970) for driven piles.更多还原