对软土中锤击贯入桩桩身层裂现象的研究

王志亮; 臧学义

doi:10.13204/j.gyjz200510012

对软土中锤击贯入桩桩身层裂现象的研究

doi: 10.13204/j.gyjz200510012

王志亮¹,
臧学义²

1.
1. 中国科学技术大学?力学与机械工程系?合肥?230026;
2.
2. 华东勘测设计研究院?杭州?310014

详细信息

作者简介:
王志亮,第一作者,男,1969年3月出生,博士后

中图分类号: TU753.3
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- 文章访问数: 59
- HTML全文浏览量: 5
- PDF下载量: 104
- 被引次数: 0
出版历程
- 收稿日期: 2005-03-12
- 刊出日期: 2005-10-20

STUDY ON SPALLING PHENOMENON OF PILE-DRIVING WITH HAMMER IN SOFT SOIL

Wang Zhiliang¹,
Zang Xueyi²

1.
1. Department of Modern Mechanics,University of Science and Technology of China Hefei 230026;
2.
2. East China Investigation &Design Institute Hangzhou 310014

摘要

摘要: 在软基中打桩时，软土层对桩的阻力很小。当桩锤以一定速度夯击桩头，桩身便传播着应力波，此类压缩波在桩尖近似自由面处反射后成为反向拉伸波，压缩、拉伸波干涉的结果往往在桩尖上部形成一个相当高的拉应力区，这会导致桩底端附近层裂(断裂)。基于一维应力波理论，采用有限差分法，对此进行了初步探讨，得出了一些有益的结论，供工程应用参考。
- 桩 /
- 层裂 /
- 应力波 /
- 流体动力弹塑性模型
Abstract: The resistance from soft soil layers is smaller while piling in soft foundation.The stress wave will propagate along pile body when the pile head is stricken by hammer with a certain velocity.And it will turn into tensile waves when reflected at the bottom of pile.Thus,one tensile stress region on pile body will appear near pile bottom because of intervention between the incident waves and the reflect waves,which can cause pile to be fractured or spalled.Based on one dimensional wave theory,the primary discussion on this phenomenon is done with finite difference method,and some benefit conclusions and suggestions are obtained.In a way,they have definite reference value for engineers.
- pile /
- spalling /
- stress wave /
- hydrodynamic-elastic-plastic model

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参考文献(11)

王奎华.有限长桩受迫振动问题解析解及其应用.岩土工程学报,1997,19(6):27～35;

[2] 刘德顺,杨襄壁.锤与桩撞击产生的应力波.建筑机械,1995(5):31～34;

[3] 尹雄,杨宝玉.打桩振动效应的有限元-无限元耦合分析.岩土力学,1999,20(3):51～55;

[4] 刘永锋.用波动方程法研究打桩过程.水运工程,2001(8)23～27;

[5] 郭文章,王树仁,刘殿书.岩石爆破层裂机理的研究.工程爆破,1997,3(3):1～4;

[6] 林旭健.软土地基中打桩的动力学依据.福州大学学报(自然科学版),1997,25(3):71～74;

[7] Li Yongchi,Tan Fuli,Guo Yang.Determination of the Damage Evolution Equation and Spalling Criterion of Metals.Journal of Nignbo University(NSEE),2003,16(4):443～447;

[8] 李永池,金咏梅,张伟,等.硬化材料中的波传播与层裂效应研究.弹道学报,1997,9(2):1～5;

[9] 朱兆祥,李永池,王肖钧.爆炸作用下钢板层裂的数值分析.应用数学和力学,1981,2(4):350～367;

[10] Tuler F R,Butcher B M.A Criterion for the Time-Dependence of Dynamic Fracture.Inter. J.Fra.Mech.,1968(4):431;

[11] Thurston R S,Mudd W L.Spallation Criteria for Numerical Computation,LA-4013,1968

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