同一建筑刚性桩与柔性桩沉降差过大事故处理

张乾青; 张忠苗; 叶强

同一建筑刚性桩与柔性桩沉降差过大事故处理 English Version

张乾青^1,2,,
张忠苗^1,2,,
叶强³

1.浙江大学软弱土与环境土工教育部重点实验室,浙江杭州 310058 ； 2. 浙江大学岩土工程研究所,浙江杭州 310058 ； 3. 温州市建筑设计研究院,浙江温州 325003

详细信息

作者简介:
张乾青 (1983 – ) ,男,山东济宁人,博士研究生,主要从事桩基础的研究工作。

中图分类号: TU473.1
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出版历程
- 收稿日期: 2011-08-03
- 发布日期: 2011-12-06

Accident treatment of large differential settlement between rigid and flexible piles in the same building

1. MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering, Zhejiang University, Hangzhou 310058, China; 2. Institute of Geotechnical Engineering, Zhejiang University , Hangzhou 310058, China ; 3. Wenzhou Building Design and Research Institute, Wenzhou 325003, China

摘要

摘要: 以同一建筑刚性桩与柔性桩沉降差过大的事故为例,详细分析了单层粮库刚柔两种桩基础沉降差过大的原因,并提出了具体加固方案。分析表明,对位于淤泥层较厚场地的单层粮库来说,不能采用刚性桩位于较好持力层而柔性桩位于淤泥层的设计方法。对于同一建筑刚性桩与柔性桩基础沉降差过大的事故,可采用钻孔灌注桩加梁板筏式基础的加固方案。这种加固方案可显著减小粮库地面沉降和粮库主体结构部分与粮库地面沉降差。
- 刚性桩 /
- 柔性桩 /
- 沉降差 /
- 加固
Abstract: The accident caused by large differential settlement between rigid and flexible piles in a grain bin is analyzed. A reinforcement scheme is proposed. The analyses show that in the site with a large depth of silt, the rigid and flexible piles should be embedded into the stiff bearing stratum with the same depth, and the rigid and flexible piles are not supposed to be drilled into the stiff bearing stratum and silt, respectively. It is concluded that bored piles and beam-slab raft foundations can be used to treat the accident of large differential settlement between rigid and flexible pile foundations. This reinforcement scheme can significantly reduce the settlement of ground and the differential settlement between ground and main body structure of the grain bin.
- rigid pile /
- flexible pile /
- differential settlement /
- solidification

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参考文献(5)

[1]	张忠苗 , 张乾青 , 刘俊伟 , 等 . 软土地区预应力管桩偏位处理实例分析 [J]. 岩土工程学报 , 2010, 32 (6): 975 – 980. (ZHNAG Zhong-miao, ZHANG Qian-qing, LIU Jun-wei, et al. Treatment of sloping prestressed pipe piles in soft soil [J]. Chinese Journal of Geotechnical Engineering, 2010, 32 (6): 975 – 980. (in Chinese))
[2]	周青春 , 李海波 , 刘亚群 . 用换填法及刚性桩复合地基基础处理桩基质量事故 [J ]. 岩土力学 , 2003, 24 (5): 845 – 848. (ZHOU Qing-chun, LI Hai-bo, LIU Ya-qun. Treatment of pile foundation accident with replacement method and rigid composite foundation[J]. Rock and Soil Mechanics, 2003, 24 (5): 845 – 848. (in Chinese))
[3]	张忠苗 , 张乾青 , 贺静漪 , 等 . 浙江某高层预应力管桩偏位和上浮处理实例分析 [J]. 岩土力学 , 2010, 31 (9): 2919 – 2924. ( ZHNAG Zhong-miao, ZHANG Qian-qing, HE Jing-yi, et al. Example analysis of sloping and floating upward prestressed pipe pile with treatment of a high-rise building in Zhejiang Province[J]. Rock and Soil Mechanics, 2010, 31 (9): 2919 – 2924. (in Chinese))
[4]	DB 33/1001 — 2003 建筑地基基础设计规范 [S]. 杭州 : 浙江大学出版社 , 2003. ( DB 33/1001 — 2003 Technical code for building pile foundation[S]. Hangzhou: Zhejiang University Press, 2008. (in Chinese))
[5]	JGJ 94 — 2008 建筑桩基技术规范 [S]. 北京 : 中国建筑工业出版社 , 2008. ( JGJ 94 – 2008 Technical code for building pile foundation[S]. Beijing: China Architecture and Building Press, 2008. (in Chinese))