| 带承台摩擦单桩荷载传递特性的原位试验研究 |
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| 引用本文： | 楼晓明,姚红英,叶文勇,吴兴良.带承台摩擦单桩荷载传递特性的原位试验研究[J].同济大学学报(自然科学版),2007,35(1):15-20. |
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| 作者姓名： | 楼晓明 姚红英 叶文勇 吴兴良 |
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| 作者单位： | 1. 同济大学,地下建筑与工程系,上海,200092
2. 上海第一市政工程公司,上海,200083 |
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| 摘 要： | 在地基表层铺设约1．5m厚砾石砂替换耕植土后，对3根带承台摩擦单桩进行荷载传递特性试验．承台尺寸分别为1．25，1．50，1．75m，桩长分别为10，17，25m．得到了各种桩-承台-地基共同作用特性的观测成果．3个试验结果表明：承台荷载分担比随总荷载的增加而增大，最终均分担了50％以上的荷载；桩长不同的复合桩基，通过调整承台平面尺寸或桩距，可以使平均地基刚度接近；带承台单桩的上部摩阻力传递函数均近似于弹塑性关系，极限位移只有1-2mm．
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| 关 键 词： | 带承台桩 荷载传递函数 静载试验 承台荷载分担比 |
| 文章编号： | 0253-374X（2007）01-0015-06 |
| 修稿时间： | 2005-04-08 |
Load Transfer Tests of Single Capped Friction Piles in Situ |
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| LOU Xiaoming,YAO Hongying,YE Wenyong,WU Xingliang.Load Transfer Tests of Single Capped Friction Piles in Situ[J].Journal of Tongji University(Natural Science),2007,35(1):15-20. |
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| Authors: | LOU Xiaoming YAO Hongying YE Wenyong WU Xingliang |
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| Institution: | 1. Department of Geoteehnical Engineering, Tongji University, Shanghai 200092, China; 2. Shanghai No. 1 Municipal Engineering Company, Shanghai 200083, China |
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| Abstract: | After 1.5 m thick gravelly sand is paved on the top of natural ground to replace the agricultural soil,load transfer tests of three single capped friction piles are conducted.The cap breadth is(1.25 m,)1.50 m and 1.75 m respectively.The pile length is 10 m,17 m and 25 m respectively.The characteristics of load on pile top and soil pressure changed with the total load.The characteristics of cap-pile-soil interaction were observed.The three tests show that the ratio of load carried by cap rises with the increase of the total load,which is over fifty percent.The rigidity of capped piles of different length is close to each other by adjusting the cap's breadth.Load transfer function on upper pile shaft under caps is all similar of elastic-plastic relation,of which limit displacement is less than 2 mm. |
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| Keywords: | capped pile load transfer function static load test load ratio by cap |
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