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[1]收稿日期:00-- 基金项目:国家自然科学基金项目(0879077),浙江省科技厅优先主题重点项目(007C0),浙江省交通运输厅科技计划项目(009H) 作者简介:李强(97-),等.饱和土中挤土桩竖向振动简化计算模型[J].建筑科学与工程学报,2011,28(01):42-48.
　LI Qiang,WANG Kui-hua,ZHANG Zhi-qing.Simplified Calculation Model for Vertical Vibration of Compaction Pile in Saturated Soil[J].Journal of Architecture and Civil Engineering,2011,28(01):42-48.
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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:
28卷
期数:
2011年01期
页码:
42-48
栏目:
出版日期:
2011-03-20

文章信息/Info

Title:
Simplified Calculation Model for Vertical Vibration of Compaction Pile in Saturated Soil
作者:
收稿日期:2010-11-13 基金项目:国家自然科学基金项目(50879077);浙江省科技厅优先主题重点项目(2007C13065); 浙江省交通运输厅科技计划项目(2009H21) 作者简介:李强(1972-),男,安徽淮南人,副教授,工学博士,E-mail:qiangli001@tom.com。
1. 浙江海洋学院 土木工程系,浙江 舟山 316004; 2. 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; 3. 浙江树人大学 城建学院,浙江 杭州 310015
Author(s):
LI Qiang1, WANG Kui-hua2, ZHANG Zhi-qing3
1. Department of Civil Engineering, Zhejiang Ocean University, Zhoushan 316004, Zhejiang, China; 2. MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering, Zhejiang University, Hangzhou 310058, Zhejiang, China; 3. School of Urban Planning, Zhe
关键词:
岩土工程;  桩土相互作用;  竖向振动;  饱和土;  孔压;  挤土桩
Keywords:
geotechnical engineering;  interaction of pile and soil;  vertical vibration;  saturated soil;  pore pressure;  compaction pile
分类号:
TU473.12
DOI:
-
文献标志码:
A
摘要:
根据挤土分区模型,建立了饱和土中考虑孔压消散的桩侧非均质挤土区桩竖向振动简化计算模型; 通过分离变量方法,得到了桩竖向振动频域解析解和时域半解析解,分析了挤土区对桩竖向振动特性的影响。数值计算结果表明:挤土区当量半径和桩周孔压增量比越小,桩周土对桩的约束作用越强; 挤土区的存在使桩土间的相互作用减弱,采用均质土完全粘结模型过高地估计了土对桩的约束能力,实际工程中尽早开展挤土桩小应变反射波检测有利于获得较大的测试深度。
Abstract:
A simplified calculation model for vertical vibration of compation pile considering the inhomogeneous compaction zone of soil in the vicinity of the pile disturbed by pile driving was established. An analytical solution was deduced in frequency domain by means of variable separating method and then a semi-analytical solution in time domain was obtained using numerical convolution method. Numerical calculation results from the frequency domain and time domain indicate that the equivalent radius of compaction zone has major effect on pile dynamic response, as well as the ratio of exceeding pore pressure. It can also be concluded that the actual interaction of pile and soil will be weaken due to the compaction zone caused by pile driving, a fact can be deduced that the interaction of pile and soil is overestimated under the ideal undisturbed model. The presented model can reflect the interaction of pile and soil better than the perfect contact model. Small strain reflected wave test of compaction pile can be conducted as soon as possible in order to obtain greater depth of pile test in practical engineering.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2010-11-13
基金项目:国家自然科学基金项目(50879077); 浙江省科技厅优先主题重点项目(2007C13065); 浙江省交通运输厅科技计划项目(2009H21)
作者简介:李 强(1972-),男,安徽淮南人,副教授,工学博士,E-mail:qiangli001@tom.com。
更新日期/Last Update: 2011-03-20