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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:

26卷

期数:

2009年04期

页码:

54-58

栏目:

出版日期:

2009-12-20

文章信息/Info

Title:

Test on Bearing Behavior of Long and Large Socketed Pile Pile-base Post-grouting

作者:

王红伟，戴国亮，叶涛，龚维明

东南大学混凝土及预应力混凝土结构教育部重点实验室,江苏南京210096

Author(s):

WANG Hong-wei, DAI Guo-liang, YE Tao, GONG Wei-ming

Key Laboratory of Concrete and Prestressed Concrete Structure of Ministry of Education, Southeast University, Nanjing 210096, Jiangsu, China

关键词:

嵌岩桩;  桩底沉渣;  桩端阻力;  桩底后压浆

Keywords:

socketed pile;  pile-base sediment;  end resistance;  pile-base post-grouting

分类号:

TU473.1

DOI:

-

文献标志码:

A

摘要:

根据1根长大嵌岩桩桩底压浆前后的试验数据,对比分析了桩底压浆对嵌岩桩桩端阻力和桩侧摩阻力发挥特性的影响。结果表明:桩底压浆有效地改善了嵌岩桩桩底沉渣的受力特性,增大了沉渣的强度和变形模量,同时在水泥浆液压力作用下对桩侧泥皮进行置换填充,在一定程度上渗透、挤密桩周泥岩,增强了桩身与桩周、桩端整体的嵌固能力,嵌岩桩整体承载力提高幅度达14%; 该试验研究成果可直接用于工程桩基设计,同时为类似嵌岩桩基设计施工提供了参考。

Abstract:

Based on the test data of one long and large socketed pile before and after pile-base grouting, the influence on exertion of side resistance and end resistance was comparatively analyzed. The results show that through socketed pile pile-base post-grouting, the force characteristics of pile-base sediment were improved powerfully, which increased the strength and deformation moduli of sediment. At the same time, the pile skin was replaced and filled under the pressure of slurry mud, and to some extends, the soft rock around the pile is penetrated and compacted, which enhances the whole mounted capacity of pile and the whole bearing capacity of socketed pile is improved by 14%. The research production can be applied to design of piles. It can also provide references for design and construction of similar socketed pile.

参考文献/References:

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[2]FLEMING W G K.The Improvement of Pile Performance by Base Grouting[J].ICE Proceedings,1993,97(2):88-93.
[3]STOCKER M F.The Influence of Post Grouting on the Load Bearing Capacity of Bored Piles[C]//RATHMAYER H G,SAARI K H O.Proceedings of the 8th European Conference on Soil Mechanics and Foundation Engineering.Rotterdam:Balkema A A,1983:121-126.
[4]黄生根,龚维明.大直径超长桩压浆后承载性能的试验研究及有限元分析[J].岩土力学,2007,28(2): 297-301. HUANG Sheng-gen,GONG Wei-ming.Test Study and Finite Element Analysis of Bearing Behavior of Large Diameter Overlength Piles After Grouting[J].Rock and Soil Mechanics,2007,28(2):297-301.
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[6]黄生根,张晓炜,曹 辉.后压浆钻孔灌注桩的荷载传递机理研究[J].岩土力学,2004,25(2):251-254. HUANG Sheng-gen,ZHANG Xiao-wei,CAO Hui.Mechanism Study on Bored Cast-in-place Piles with Post-grouting Technology[J].Rock and Soil Mechanics,2004,25(2):251-254.
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[8]JTGD 63-2007,公路桥涵地基与基础设计规范[S]. JTGD 63-2007,Highway Bridges and Culverts of Foundation Design Specification[S].
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[10]龚维明,戴国亮,蒋永生,等.桩承载力自平衡测试理论与实践[J].建筑结构学报,2002,23(1):82-88. GONG Wei-ming,DAI Guo-liang,JIANG Yong-sheng,et al.Theory and Practice of Self-balanced Loading Test for Pile Bearing Capacity[J].Journal of Building Structures,2002,23(1):82-88.

相似文献/References:

[1]邓国栋.嵌岩特性对嵌岩桩桩顶扭转振动阻抗的影响[J].建筑科学与工程学报,2019,36(03):55.
　DENG Guo-dong.Influence of Rock-socketed Characteristics on Torsional Dynamic Impedance at Head of Rock-socketed Pile[J].Journal of Architecture and Civil Engineering,2019,36(04):55.

备注/Memo

备注/Memo:

收稿日期:2009-09-10
基金项目:“十一五”国家科技支撑计划项目(2008BAG07B01); 江苏省自然科学基金项目(BK2008315)
作者简介:王红伟(1982-),男,河南开封人,工学硕士研究生,E-mail:hongwei2007021@126.com。

常用功能

更新日期/Last Update: 2009-12-20