| 引用本文: | 房凯,张忠苗,刘志军,刘兴旺.基于荷载传递法的后注浆桩荷载沉降关系预测[J].哈尔滨工业大学学报,2012,44(12):95.DOI:10.11918/j.issn.0367-6234.2012.12.017 |
| FANG Kai,ZHANG Zhong-miao,LIU Zhi-jun,LIU Xing-wang.Load settlement relationship prediction for grouted pile based on load transfer function method[J].Journal of Harbin Institute of Technology,2012,44(12):95.DOI:10.11918/j.issn.0367-6234.2012.12.017 |
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| 基于荷载传递法的后注浆桩荷载沉降关系预测 |
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房凯1,2, 张忠苗1,2, 刘志军1,2, 刘兴旺3
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(1.浙江大学 岩土工程研究所, 310058 杭州; 2. 浙江大学 软弱土与环境土工教育部重点实验室,310058 杭州;3. 浙江省建筑设计研究院,310006 杭州);1.浙江大学 岩土工程研究所, 310058 杭州;2.浙江大学 软弱土与环境土工教育部重点实验室,310058 杭州;3.浙江省建筑设计研究院,310006 杭州
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| 摘要: |
| 为了预测竖向荷载下后注浆桩的荷载变形特性,在荷载传递法的基础上,采用双曲线的荷载传递函数,推导了后注浆桩桩身荷载和沉降关系的迭代模型,给出了成层地基中后注浆单桩的迭代求解方法．为了考虑注浆对桩端桩侧阻力的影响,引入了后注浆荷载传递参数提高因子,在统计的基础上给出了提高因子的经验取值范围,最后通过一个工程实例评估了该方法的合理性．结果表明本文方法能较好地给出后注浆桩荷载沉降关系的范围,可以保守地将预测的下限用于设计． |
| 关键词: 后注浆桩 荷载传递法 提高因子 荷载沉降关系 |
| DOI：10.11918/j.issn.0367-6234.2012.12.017 |
| 分类号:TU473.1 |
| 基金项目:国家自然科学基金资助项目 (51078330). |
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| Load settlement relationship prediction for grouted pile based on load transfer function method |
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FANG Kai1,2, ZHANG Zhong-miao1,2, LIU Zhi-jun1,2, LIU Xing-wang3
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(1. Institute of Geotechnical Engineering, Zhejiang University, 310058 Hangzhou, China; 2. MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering, Zhejiang University, 310058 Hangzhou, China; 3. Zhejiang Province Institute of Architectural Design and Research, 310006 Hangzhou, China);1.Institute of Geotechnical Engineering, Zhejiang University, 310058 Hangzhou, China;2.MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering, Zhejiang University, 310058 Hangzhou, China ;3.Zhejiang Province Institute of Architectural Design and Research, 310006 Hangzhou, China
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| Abstract: |
| To obtain a good prediction of the grouted pile behavior under vertical loads, an iteration method based on the hyperbolic load transfer function is developed to determine the load settlement relationship of the grouted pile in this paper. The calculation procedure for a single grouted pile in layered soil is presented. Four improvement factors are introduced to account for the effect of grouting on the side friction and end resistance. The empirical range of the improvement factor is also given based on statistical analysis. Finally, a case history is cited to indicate the validity of the presented method. The results show that the presented method can predict the range of load settlement relationship of the pile head well. It is suggested that the predicted lower bound can be used for a conservative design. |
| Key words: grouted pile load transfer method improvement factor load settlement relationship |
