| 软黏土中超长预应力高强度混凝土 管桩竖向承载特性试验研究 |
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| 引用本文： | 姜振春.软黏土中超长预应力高强度混凝土 管桩竖向承载特性试验研究[J].岩土力学,2012,33(9):2639-2644. |
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| 作者姓名： | 姜振春 |
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| 作者单位： | 海军海防工程技术管理室，北京 100841 |
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| 摘 要： | 港口码头工程建设将向外海开敞式发展，由于工程地质条件日趋复杂，在超厚软黏土地基上建设高桩码头面临重大难题。因持力层埋深较深，预应力高强度混凝土（PHC）管桩成为设计首选的超长桩基础型式。针对某军用码头85 m设计桩长的试桩进行了试验和数值计算，分析了超长PHC管桩承载力机制与传递规律，基于传递函数法提出改进的双曲函数计算模型，并对垂直静载试桩进行计算。结果表明：桩身轴力和桩顶位移的计算值与实测值吻合较好，证明提出的双曲线模型能够反映轴向承载PHC管桩桩-土相互作用实际情况，能够为软黏土中超长PHC管桩基桩设计提供依据。
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| 关 键 词： | 软黏土 超长PHC管桩 竖向承载机制 试验研究 |
| 收稿时间： | 2012-05-22 |
Experimental study of vertical bearing behaviors of super-long prestressed high-strength concrete pipe pile in soft clay |
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| JIANG Zhen-chun.Experimental study of vertical bearing behaviors of super-long prestressed high-strength concrete pipe pile in soft clay[J].Rock and Soil Mechanics,2012,33(9):2639-2644. |
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| Authors: | JIANG Zhen-chun |
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| Institution: | Technical Management Office of Naval Defence Engineering, Beijing 100841, China |
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| Abstract: | As the construction project of port terminals developing seaward,engineering geological conditions get increasingly complex;it faces major challenges to build high-pile wharf on super thick soft clay foundation.Prestressed high-strength(PHC) pipe pile comes to the fore in designing to build the super-long foundation because of the deeply buried bearing stratum.This paper analyses the bearing mechanism and transfer rule of super-long PHC pile through test piles and numerical computation of pile(Its design pile length is 85m.) from a military wharfs.It comes up with the improved hyperbolic model on the base of transfer function method,and calculates vertical static load of test pile.The results are as follows.The calculated values of pile axial force and pile top displacement agree well with measured values,so as to prove that the curves proposed in this paper reflect the actual situation of the interaction between axial loading PHC pipe pile and soil;and it can provide guidance to design super-long PHC pipe pile in soft clay. |
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| Keywords: | soft clay super-long PHC pipe pile vertical bearing mechanism experimental study |
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