砂土中钢管桩承载力的静力触探设计方法

俞峰; 杨峻

砂土中钢管桩承载力的静力触探设计方法 English Version

俞峰¹,
杨峻²

1.浙江理工大学建筑工程学院,浙江杭州 310018 ； 2. 香港大学土木工程系,香港

基金项目: 香港研究资助局基金项目(G_HK032)；浙江省公益性技

详细信息

作者简介:
俞峰 (1976 – ) ,男,博士,副教授,主要从事桩基工程的教学和研究工作。

中图分类号: TU473
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出版历程
- 收稿日期: 2011-08-07
- 发布日期: 2011-12-06

Design methods for bearing capacity of steel pipe piles driven in sand by means of cone penetration tests

YU Feng¹,
YANG Jun²

1. School of Civil Engineering and Architecture, Zhejiang Sci-Tech University, Hangzhou 310018, China; 2. Department of Civil Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, China

摘要

摘要: 静力触探原位试验法确定单桩承载力,主要用于混凝土预制桩,而钢管桩的挤土效应较小,还具有土塞效应问题。针对这些特点,在国外已建立的 ICP 和 UWA 等设计方法的基础上还提出了 HKU 设计方法。这 3 种方法具有类似的理论背景,且都利用静力触探锥尖阻力分别计算端阻和侧阻。尽管如此,在预测原型试桩承载力时 3 种方法的计算值差别较大。其不同点在于：端阻力计算中对管壁和土塞部分是否分别考虑；对桩端承载影响区的理解；对侧阻疲劳退化的考虑；以及如何利用土塞指标考虑闭塞程度和沉桩挤土效应的影响。
- 钢管桩 /
- 砂土 /
- 静力触探试验 /
- 土塞 /
- 桩端影响区 /
- 侧阻疲劳退化
Abstract: The use of cone penetration test results to evaluate the capacity of single piles, referred to as in-situ test-based design method in China, is restricted largely to precast concrete piles. This method may not be applicable to small-displacement steel pipe piles which further encounters the problem of soil plug. Attempts have been made overseas for the design of steel pipe piles such as the ICP and UWA methods and more recently the HKU method developed by the authors. The three methods have similar theoretical background, and they all correlate the base and shaft resistances to the cone tip resistance. The predicted capacities of full-scale test piles, however, differ significantly. Such uncertainty is associated with several important factors such as separate/combining evaluation of the annulus and plug resistances, proper considerations of influence zone and friction fatigue and, utilization of plug indices to include the effects of partial plugging and soil displacement due to driving.
- steel pipe pile /
- sand /
- cone penetration test /
- soil plug /
- influence zone of end bearing /
- friction fatigue

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参考文献(16)

[1]	王钟琦 . 我国的静力触探及动静触探的发展前景 [J]. 岩土工程学报 , 2000, 22 (5): 517 – 522. (WANG Zhong-qi. The Chinese CPT and the prospect of penetration tests[J]. Chinese Journal of Geotechnical Engineering, 2000, 22 (5): 517 – 522. (in Chinese))
[2]	孟高头 , 曹恺 , 陈亮 . 关于静力触探的国际化问题 [J]. 岩土工程学报 , 2001, 23 (3): 383 – 384. (MENG Gao-tou, CAO Kai, CHEN Liang. On the globalization of CPT[J]. Chinese Journal of Geotechnical Engineering, 2001, 23 (3): 383 – 384. (in Chinese))
[3]	铁路触探研究组 . 静力触探确定打入混凝土桩的承载力 [J]. 岩土工程学报 , 1979, 1 (1): 4 – 23. (Penetration research group of railway. Determination of bearing capacity of rammed concrete piles by means of static cone penetration tests[J]. Chinese Journal of Geotechnical Engineering, 1979, 1 (1): 4 – 23. (in Chinese))
[4]	陈继成 . 静力触探估算软土地区打入桩的单桩承载力（双用探头） [J]. 岩土工程学报 , 1987, 9 (3): 55 – 70. (CHEN Ji-cheng. Estimation of bearing capacity of driven pile from static cone penetration data in soft soils area (compound cone)[J]. Chinese Journal of Geotechnical Engineering, 1987, 9 (3): 55 – 70. (in Chinese))
[5]	陈强华 , 俞调梅 . 静力触探在我国的发展 [J]. 岩土工程学报 , 1991, 13 (1): 84 – 95. (CHEN Qiang-hua, YU Diao-mei. Development of CPT in China[J]. Chinese Journal of Geotechnical Engineering, 1991, 13 (1): 84 – 95. (in Chinese))
[6]	JGJ94 — 2008. 建筑桩基技术规范 [S]. 2008. (JGJ94 — 2008. Technical code for building pile foundation[S]. 2008. (in Chinese))
[7]	RANDOLPH M, CASSIDY M, GOURVENEC S. Challenges of offshore geotechnical engineering[C]// Proceedings of 16th International Conference on Soil Mechanics & Geotechnical Engineering. Osaka, 2005: 123 – 176.
[8]	JARDINE R, CHOW F, OVERY R, et al. ICP design methods for driven piles in sands and clays[M]. London: Thomas Telford, 2005.
[9]	LEHANE B, SCHNEIDER J, XU X. CPT based design of driven piles in sand for offshore structures, GEO: 05345[R]. Perth: University of Western Australia, 2005.
[10]	YU F, YANG J. Improved evaluation of interface friction on steel pipe pile in sand[J]. ASCE Journal of Performance of Constructed Facilities, 2010, in press.
[11]	SCHNEIDER J, XU X, LEHANE B. Database assessment of CPT-based design methods for axial capacity of driven piles in siliceous sands[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2008, 134 (9): 1227 – 1244.
[12]	蔡国军 , 刘松玉 , 童立元 , 等 . 现代数字式多功能 CPTU 与中国 CPT 对比试验研究 [J]. 岩石力学与工程学报 , 2009, 28 (5): 914 – 928. (CAI Guo-jun, LIU Song-yu, TONG Li-yuan, et al. Comparative study of modern digital multifunctional CPTU and China's CPT tests[J]. Chinese Journal of Rock Mechanics and Engineering, 2009, 28 (5): 914 – 928. (in Chinese))
[13]	KIKUCHI Y, MIZUTANI M, YAMASHITA H. Vertical bearing capacity of large diameter steel pipe piles[C]// Procee dings of International Workshop on Recent Advances of Deep Foundations. Yokosuka, 2007: 177 – 182.
[14]	RANDOLPH M. Science and empiricism in pile foundation design[J]. Géotechnique, 2003, 53 (10): 847 – 875.
[15]	DE NICOLA A, RANDOLPH M. Centrifuge modelling of pipe piles in sand under axial loads[J]. Géotechnique, 1999, 49 (3): 295 – 318.
[16]	YANG J. Influence zone for end bearing of piles in sand[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2006, 132 (9): 1229 – 1237.