现浇 X 形混凝土桩与圆形桩承载性状对比试验研究

张敏霞; 刘汉龙; 丁选明; 王智强

现浇 X 形混凝土桩与圆形桩承载性状对比试验研究 English Version

张敏霞^1,2,
刘汉龙^1,3,
丁选明^1,3,
王智强^1,3

1. 河海大学岩土力学与堤坝工程教育部重点实验室，江苏南京 210098 ； 2. 河南理工大学土木工程学院，河南焦作 454000 ； 3. 河海大学岩土工程科学研究所，江苏南京 210098

基金项目: 江苏省自然科学基金创新学者攀登项目（BK2008040）；江苏省青蓝工程创新团队项目；教育部博士点基金项目（2010516211）；河海大学中央高校基本科研业务费与专项资金项目（2010B29914）

详细信息

作者简介:
张敏霞 (1979 – ) ，女，博士研究生，讲师，主要从事地基处理与土动力学方面的教学与科研工作。

中图分类号: TU47
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出版历程
- 发布日期: 2011-09-14

Comparative tests on bearing capacity of cast-in-situ X-shaped concrete piles and circular pile

(1. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China; 2. College of Civil Engineering of Henan Polytechnic University, Jiaozuo 454000, China; 3. Geotechnical Research Institute, Hohai University, Nanjing 210098, China)

摘要

摘要: 通过现浇 X 形混凝土桩与等截面圆形桩、等周长圆形桩足尺模型静载试验，对比分析了试验各桩桩身轴力分布、桩侧摩阻力以及桩端阻力的发展情况，并对 X 形桩的荷载传递机理进行了深入研究。试验结果表明：对于本次研究对象的 X 形桩，与等截面圆形桩相比：其极限承载力及桩身单位体积混凝土极限承载力均为等截面圆形桩的 1.32 倍，与等周长圆形桩相比：其极限承载力及桩身单位体积混凝土极限承载力分别为等周长圆形桩的 0.84 倍与 1.47 倍。从提高桩基承载力，节约桩身混凝土用量角度来看， X 形桩是一种具有较高的竖向承载力且造价低的新型桩，因此该桩在软土地基中有广泛的推广和应用价值。
- 现浇 X 形混凝土桩 /
- 静载荷试验 /
- 荷载传递机理 /
- 极限承载力
Abstract: Through the full scale static load model tests on the cast-in-situ X-shaped concrete piles and circular piles with the same cross-section area and circular p iles with the same perimeter, the distribution of pile axial force and the development of pile shaft resistance and pile toe resistance are comparatively analyzed, and the load transfer mechanism of the X-shaped piles is studied. The tes t results show that: for the X-shaped piles, the ultimate bearing capacity and the bearing capacity per unit volume of pile concrete are both 1.32 times those of the circular pile in the same area, and 0.84 times and 1.47 times respectively those of the circular piles with the same perimeter. From the view of improving the bearin g capacity of the pile and saving the amount of pile concrete, the X-shaped pile is a new pile with is high vertical bearing capacity and low cost, therefore it has the extremely high promotion and application value in soft soil foundation.
- cast-in-situ X-shaped concrete pile /
- static load test /
- load transfer mechanism /
- ultimate bearing capacity

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参考文献(20)

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