带承台单桩及其复合地基承台效应的静载试验研究

徐宏跃; 周明琪; 楼晓明

带承台单桩及其复合地基承台效应的静载试验研究 English Version

1. 上海城市建设设计研究院,上海 200125 ； 2. 同济大学地下建筑与工程系,上海 200092

详细信息

作者简介:
徐宏跃 (1977 – ) ,男,浙江义乌人,工程师,主要从事路基工程的设计研究。

中图分类号: TU447
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出版历程
- 收稿日期: 2011-08-01
- 发布日期: 2011-12-06

Static load tests on cap effect of single capped pile and its composite foundation

1. Shanghai Urban Construction Design & Research Institute, 3447 Dongfang Road, Shanghai 200125 ； 2. Dept. of Geotechnical Engineering, Tongji University, Shanghai 200092

摘要

摘要: 通过静载试验,实测带承台单桩的 <> Q – <> s 曲线及桩顶部位的轴力,承台边长为 1.5 m ´ 1.5 m ,承台荷载分担比随荷载的增加而增加；对另一根同样的带承台单桩,在桩顶铺设 50 cm 砂垫层后,再铺设边长 2.5 m ´ 2.5 m 的刚性荷载板（可以看做是更大的承台）,实测复合地基承台表面和外围土的压力随荷载的变化情况,刚性板和褥垫层下带承台刚性桩复合地基承台外围土的荷载分担比随荷载的增加而减小。这两组试验的结果与有限元模拟结果比较接近。
- 带承台单桩 /
- 复合地基 /
- 承台效应 /
- 荷载分担比
Abstract: Based on the static load tests, load-settlement curves of a single capped rigid pile and forces on pile top are monitored. The width of square cap is 1.5 m. The load sharing ratio of cap-soil contact pressure increases with the increasing total load. For the other single capped rigid pile, the sand cushion 0.5 m in thickness and rigid square plate (a larger cap) 2.5 m in width are placed. The load-settlement curves and the pressures on the surface of the cap and the ground are measured. The load sharing ratio of the ground under rigid plate decreases with the increasing total load. The mentioned effect of the cap is in accordance with that analyzed by finite element method.
- single capped pile /
- composite foundation /
- cap effect /
- load sharing ratio

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参考文献(8)

[1]	陈强华 , 张雁 , 洪毓康 . 承台与短桩共同作用的试验研究 [J]. 建筑科学 , 1992(2): 30 – 36. (CHEN Qiang-hua, ZHANG Yan, HONG Yu-kang. Experimental research on the interaction between cap and short pile[J]. Chinese Building Science, 1992(2): 30 – 36. (in Chinese))
[2]	楼晓明 , 姚红英 , 叶文勇 , 等 . 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. (LOU Xiao-ming, YAO Hong-ying, YE WEN-Yong, et al. Load transfer tests of single capped piles in situ[J]. Journal of Tongji University (Nature Science), 2007, 35 (1): 15 – 20. (in Chinese))
[3]	池跃君 , 沈伟 , 宋二祥 . 桩体复合地基桩、土相互作用的解析法 [J]. 岩土力学 , 2002, 23 (5): 546 – 550. (CHI Yue-jun, SHEN Wei, SONG Er-xiang. Analytical method for calculating pile-soil-cushion interaction of composite grounds with piles[J]. Rock and Soil Mechanics, 2002, 23 (5): 546 – 550. (in Chinese))
[4]	龚晓南 . 地基处理技术发展与展望 [M]. 北京 : 水利水电出版社 , 2004. (GONG Xiao-nan. The development and outlook of ground improvement[M]. Beijing: Water Resource and Electric Power Press, 2004. (in Chinese))
[5]	LOW B K, TANG S K, CHOA V. Arching in piled embankment[J]. Journal of Geotechnical Engineering, ASCE, 1993, 120 (11): 1917 – 1938.
[6]	陈云敏 , 贾宁 , 陈仁朋 . 桩承式路堤土拱效应分析 [J]. 中国公路学报 , 2004, 17 (4): 1 – 6. (CHEN Yun-min, JIA Ning, CHEN Ren-peng. Soil arch analysis of pile-supported embankments[J]. China Journal of Highway and Transport, 2004, 17 (4): 1 – 6. (in Chinese))
[7]	楼晓明 , 孙晓锋 , 陈广 . 大面积路堤荷载下带承台桩的荷载传递分析 [J]. 土木工程学报 , 2009, 42 (2): 98 – 104. (LOU Xiao-ming, SUN Xiao-feng, CHEN Guang. Analysis on load transfer for caped pile under large area embankment[J]. China Civil Engineering Journal, 2009, 42 (2): 98 – 104. (in Chinese))
[8]	何良德 , 陈志芳 , 徐泽中 . 带帽 PTC 单桩和复合地基承载特性试验研究 [J]. 岩土力学 , 2006, 27 (3): 435 – 444. (HE Liang-de, CHEN Zhi-fang, XU Ze-zhong. Experimental study on load-bearing characteristics for single PTC pile with cap and composite foundation with PTC (prestressed thin-wall concrete) piles[J]. Rock and Soil Mechanics, 2006, 27 (3): 435 – 444. (in Chinese))