摘要
依据上海地区某超高层商业建筑试桩的高吨位竖向抗压静载试验结果,通过对基桩的竖向极限承载力性状、桩身轴力传递特性以及桩侧阻力、桩端阻力发挥特性的分析研究,揭示了桩底注浆对基桩承载性状的影响情况,深入探讨了上海软土地区大直径超长后注浆灌注桩的荷载传递机理和竖向承载性状,提出了单桩承载力的估算方法。
Based on the results of high tonnage vertical static loading test of the two single piles with base - grouting in the super high - rise building, the influence of base - grouting on the bearing properties of pile is revealed by analyzing its properties of vertical limiting bearing capacity, axial load transmission and tip and shaft resistance of pile, Load transfer performance and bearing mechanism is discussed in detail. In the end, a method to estimate the ultimate load bearing capacity of single pile is suggested.
出处
《上海地质》
2007年第2期45-48,55,共5页
关键词
软土
大直径超长灌注桩
桩端注浆
高吨位静载试验
荷载传递
承载力估算
soft soil, super long and large -diameter bored piles, base -grouting pile, high tonnage vertical static loading test, load transfer, estimate of bearing capacity
