Effect of Spatial Correlation of Cone Tip Resistance on the Bearing Capacity of Piles

Effect of Spatial Correlation of Cone Tip Resistance on the Bearing Capacity of Piles
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锥顶阻力空间相关性对桩承载力的影响

DOI:
10.1061/(asce)gt.1943-5606.0000775
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发表时间:
2013-03
影响因子:
3.9
通讯作者:
Zhang, Lianyang
Zhang, Lianyang
中科院分区:
工程技术2区
文献类型:
--
作者:
Chen, Jin-Jian;Zhang, Lianyang

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静力触探(CPTs)测得的桩端阻力(qc)被广泛用于确定桩的承载力。虽然众所周知,土的性质是空间相关的,但在目前预测桩的承载力的方法中没有考虑qc的空间相关性。考虑桩长范围内桩底土层qc的空间平均值qcsVn与桩底附近某一区间qc的空间平均值qcbV之间的空间相关性,提出了一种预测粘性土中打入桩承载力的概率方法。进行参数研究,以评估qcsVn和qcbV之间的空间相关性对桩承载力的影响。研究结果表明,在概率预测桩承载力时,考虑qcsVn和qcbV之间的空间相关性是很重要的。忽略qcsVn和qcbV之间的空间相关性将低估…
AbstractThe cone tip resistance (qc) from cone penetration tests (CPTs) is widely used to determine the bearing capacity of piles. Although it is widely known that soil properties are spatially correlated, the spatial correlation of qc is not considered in the current methods for predicting the bearing capacity of piles. In this paper, a probabilistic approach is presented for predicting the bearing capacity of driven piles in clay by considering the spatial correlation between qcsVn (the spatial average of qc of the bottom soil layer within the pile length) and qcbV (the spatial average of qc over an interval near the pile base). Parametric studies are conducted to evaluate the effect of the spatial correlation between qcsVn and qcbV on the bearing capacity of piles. The results indicate that it is important to consider the spatial correlation between qcsVn and qcbV in the probabilistic prediction of the bearing capacities of piles. Ignoring the spatial correlation between qcsVn and qcbV will underestima...
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