对称双斜桩基础是斜桩用于实际工程的基本形式, 也是用得较多的形式。相比工程应用, 对称双斜桩的理论研究仍显滞后, 基本没有关于对称双斜桩在复杂荷载下的承载力研究。通过桩身对竖向倾角为10°的对称双斜桩基础的模型试验, 研究竖向荷载对水平承载力影响的特点。研究发现, 随着竖向荷载的增大, 桩顶水平位移的稳定时间逐渐增长;竖向荷载的增加可以提高水平承载力, 但竖向荷载过大, 反而降低其水平承载力。由于这种荷载情况与实际工程对称双斜桩的受力情况具有高度的一致性, 其研究结果对于对称双斜桩的理论分析、设计和在工程实践中的应用具有一定的指导意义。
Abstract
Symmetrically inclined double-pile is the basic and commonly used form of inclined piles. Theoretic research in this regard lags behind compared with engineering application. Research on the bearing capacity of symmetrically inclined double-pile under complex loads is rarely seen. In this paper, the influence of vertical load on horizontal bearing capacity is investigated through model test on symmetrically inclined double-pile with the pile inclination of 10°. Results indicate that as vertical load increases, the duration of horizontal displacement increases, and the horizontal bearing capa city increases. However excessive vertical load would reduce the horizontal bearing capacity. Since the load condition in this research is highly consistent with engineering practice, it is of guiding importance for the theoretical analysis, design and application of symmetrically inclined double-pile.
关键词
对称双斜桩 /
模型试验 /
竖向荷载 /
水平承载力
Key words
symmetrically inclined double-pile /
model test /
vertical load /
horizontal bearing capacity
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参考文献
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[10]LV Fan-ren, YIN Ji-ming, JIN Yao-hua. Study on Load-Displacement of Batter Pile under Vertical Load by Model Experiments [C]∥Proceedings of the International Conference on Electric Technology and Civil Engineering (Volume 4). Apr 22 - 24, Lushan, China, 2011: 3506-3509.
基金
人才培养项目(江苏省第四期“333工程”第三层次培养对象资助)
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