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粘土中横向静载桩P-Y曲线的一种新的统一法 被引量:46

A New Unitedd Method of P-Y Curves of Laterally Statically Loaded Piles in Clay
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摘要 本文根据土的本构关系,研究了邓肯模式与静载试桩P-Y曲线之间的关系,得到了它们相对应的割线模量之间的相关关系准则;并由此引入代表土质特性的特征参数β值,同时借助于Reese和其它粘土地区试桩资料,建立了桩侧极限土抗力的计算公式.本文还根据试桩P-Y线,研究了极限土抗力部分的P-Y曲线.结果表明,小于极限土抗力部分的P-Y曲线符合双曲线律;而达到极限土抗力之后的P-Y曲线,其保持极限值不变.这一结论不仅适用于软粘上,还适用于硬粘土,从而为本文建立粘土中横向受载桩静载P-Y曲线统一法奠定了基础. In this paper, the relationship between the Duncan model and the P-Y curves of statically loaded piles is studied, and the interrelation criterion of their corresponding secant moduli is obtained. Therefore, the β value is introduced which represents the soil charateristics, and with the aid of field testing results of Reese and other clay areas, the formula of limit soil resistance is established. In addition, on the basis of the P-Y curve of test piles, the P-Y curve for the limit soil resistance is studied. The results show that the part of P-Y curve for the soil resistance smaller than the limit value is in the pattern of hyperbola, while for that higher than the limit value, it keeps the limit value. This conclusion does not only apply to soft clay but also to stiff clay, and it lays the foundation for the establishment of the present united method of P-Y curves of laterally statically loaded piles in clay.
出处 《河海大学学报(自然科学版)》 CAS CSCD 1991年第1期9-17,共9页 Journal of Hohai University(Natural Sciences)
关键词 桩基 承载力 横向 粘土 P-Y曲线 laterally loaded pile field testing clay P-Y curve interrelation united method
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参考文献1

  • 1王惠初,鲁子爱.用P-Y曲线计算横向荷载桩的内力[J]重庆交通学院学报,1985(01).

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