大直径人工挖孔桩离析事故加固设计与施工技术

邵广彪; 孙剑平; 江宗宝

大直径人工挖孔桩离析事故加固设计与施工技术 English Version

1.山东建筑大学土木学院,山东济南 250101 ； 2. 山东建大工程鉴定加固研究所,山东济南 250014

基金项目: 住房和城乡建设部 2009 年科学技术项目计划( 2009-K3-17)

详细信息

作者简介:
邵广彪 (1978 – ) ,男,山东成武人,博士,副教授,主要从事岩土工程及防灾减灾研究。

中图分类号: TU473
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- 收稿日期: 2011-08-01
- 发布日期: 2011-12-06

Reinforcing design and construction technology of large-diameter artificial bored pile segregation accident

1. School of Civil Engineering, Shandong Jianzhu University, Jinan 250101, China; 2. Institute of Engineering Identification and Reinforcement of Shandong Jianda, Jinan 250014, China

摘要

摘要: 人工挖孔桩承载性能好,施工方便,在土建工程中应用广泛,但地下水位较高时, 施工措施不力易使桩身混凝土产生离析。某体育场桩基工程包括抗压桩、抗拔桩以及抗压抗拔桩等三类基桩,经检测发现桩身混凝土离析。通过对该工程基桩取芯检测,分析了离析事故的特点和原因,针对桩基受力性能和离析部位不同,对抗拔桩采用桩内增设抗拔锚杆法加固,对抗压桩以及拉压桩采用桩内增设微型钢管桩法加固,并介绍了以上桩基加固施工措施。通过加固后桩基静载试验和工程现状 ,表明以上加固设计方案和施工措施取得理想效果,可为严重离析的基桩加固提供可靠的工程参考。
- 人工挖孔桩 /
- 离析 /
- 加固 /
- 抗拔锚杆 /
- 微型钢管桩
Abstract: Artificial bored pile has high bearing capacity and is convenient to construct and has been widely applied to civil engineering. However, concrete segregation will happen due to ineffective construction measure when there is an higher groundwater table. There are three kinds of piles including compressive pile, uplift pile and pull-compressive pile in a stadium pile foundation project, and concrete segregation phenomenon is detected. The characteristics and reasons of segregation are analyzed by coring test data of piles. According to different mechanical properties and segregation locations, the pulling resistant anchor added in the piles is used to reinforce the uplift pile, and the micro-steel pile added in the piles is employed to reinforce the compressive pile and pull-compressive pile. The construction measures of reinforcing methods are introduced. The static loading tests and situation after pile strengthening that the reinforcing design and construction measures have achieved satisfactory effect, and it may provide reference for similar reinforcing projects of pile concrete segregati on accident.
- artificial bored pile /
- segregation /
- reinforcement /
- pulling resistant anchor /
- micro-steel pile

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参考文献(5)

[1]	祝成展 . 人工挖孔桩补强技术在工程中的应用 [J]. 中外建筑 , 2002, 7 (6):73 – 74. (ZHU Cheng-zhan. Application of pile reinforcement technology in artificial dig-hole pile[J]. Chinese and Overseas Architecture, 2002, 7 (6):73 – 74 (in Chinese))
[2]	郭秀丽 . 某工程人工挖孔桩桩身离析及桩底夹渣处理 [J]. 山西建筑 , 2010, 36 (23): 129 – 130. (GUO Xiu-li. Processing for segregation and bottom slag of artificial dig-hole pile[J]. Shanxi Architecture, 2010, 36 (23): 129 – 130. (in Chinese))
[3]	彭振斌 , 胡贺松 , 何忠明 , 等 . 复合注浆法在桩基加固中的应用 [J]. 岩土工程界 , 2004, 7 (3): 27 – 29. (PENG Zhen-bin, HU He-song, HE Zhong-ming, et al. Application of composite grouting reinforcement in the pile foundation[J]. Geotechnical Engineering World, 2004, 7 (3): 27 – 29. (in Chinese))
[4]	黄强 , 刘金砺 , 高文生 , 等 . JGJ94 — 2008 建筑桩基技术规范 [M]. 北京 : 中国建筑工业出版社 , 2008. (HUANG Qiang, LIU Jin-li, GAO Wen-sheng, et al. JGJ94 — 2008 Technical code for building pile foundation[M]. Beijing: China Architecture and Building Press, 2008. (in Chinese))
[5]	黄熙龄 , 腾延京 , 王铁宏 , 等 . GB50007 — 2002 建筑地基基础设计规范 [M]. 北京 : 中国建筑工业出版社 , 2002. (HUANG Xi-ling, TENG Yan-jing, WANG Tie-hong, et al. GB50007 — 2002 Code for design of building foundation[M]. Beijing: China Architecture and Building Press, 2002. (in Chinese))

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大直径人工挖孔桩离析事故加固设计与施工技术 English Version

作者简介: 邵广彪 (1978 – ) ,男,山东成武人,博士,副教授,主要从事岩土工程及防灾减灾研究。

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出版历程

Reinforcing design and construction technology of large-diameter artificial bored pile segregation accident

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目录

作者简介:
邵广彪 (1978 – ) ,男,山东成武人,博士,副教授,主要从事岩土工程及防灾减灾研究。