«上一篇/Previous Article|本期目录/Table of Contents|下一篇/Next Article»

《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:

[1] JGJ 106—2003,建筑基桩检测技术规范[S]. JGJ 106—2003,Technical Code for Testing of Building Foundation Piles[S].
[2]NOVAK M,NOGAMI T,ABOUL-ELLA F.Dynamic Soil Reactions for Plane Strain Case[J].Journal of Engineering Mechanics,1978,104(4):953-959.
[3]VELETSOS A S,DOTSON K W.Impedance of Soil Layer with Disturbed Boundary Zone[J].Journal of Geotechnical Engineering,1986,112(3):363-368.
[4]YANG D Y,WANG K H,ZHANG Z Q,et al.Vertical Dynamic Response of Pile in a Radially Heterogeneous Soil Layer[J].International Journal for Numerical and Analytical Methods in Geomechanics,2009,33(8):1039-1054.
[5]HAN Y C,SABIN G C W.Impedances for Radially Inhomogeneous Viscoelastic Soil Media[J].Journal of Engineering Mechanics,1995,121(9):939-947.
[6]周铁桥,王奎华,谢康和,等.轴对称径向非均质土中桩的纵向振动特性分析[J].岩土工程学报,2005,27(6):720-725. ZHOU Tie-qiao,WANG Kui-hua,XIE Kang-he,et al.Vertical Vibration Analysis of Piles in Radial Heterogeneous Soil[J].Chinese Journal of Geotechnical Engineering,2005,27(6):720-725.
[7]NOGAMI T,REN F,CHEN J W,et al.Vertical Vibration of Pile in Vibration-induced Excess Pore Pressure Field[J].Journal of Geotechnical and Geoenvironmental Engineering,1997,123(5):422-429.
[8]ZENG X,RAJAPAKSE R K N D.Dynamic Axial Load Transfer from Elastic Bar to Poroelastic Medium[J].Journal of Engineering Mechanics,1999,125(9):1048-1055.
[9]李 强,王奎华,谢康和.饱和土中端承桩纵向振动特性研究[J].力学学报,2004,36(4):435-442. LI Qiang,WANG Kui-hua,XIE Kang-he.Vertical Vibration of an End Bearing Pile Embedded in Saturated Soil[J].Acta Mechanica Sinica,2004,36(4):435-442.
[10]李 强.饱和土中端承桩非完全黏结下的竖向振动特性[J].水利学报,2007,38(3):349-354. LI Qiang.Vertical Vibration of Piles Embedded in Saturated Soil Considering the Imperfect Contact[J].Journal of Hydraulic Engineering,2007,38(3):349-354.
[11]白 冰,徐建平,周 健.饱和软粘土地基沉桩过程中桩土挤压应力及超孔压计算[J].重庆交通学院学报,2000,19(3):1-3,7. BAI Bing,XU Jian-ping,ZHOU Jian.Study on Squeezing Effect Against Soil and Pore Pressure by Pile Pushing in Saturated Soft Clay Foundation[J].Journal of Chongqing Jiaotong Institute,2000,19(3):1-3,7.
[12]MARTIN P P,SEED H B.Simplified Procedure for Effective Stress Analysis of Ground Response[J].Journal of Geotechnical Engineering Division,1979,105(6):739-758.
[13]BIOT M A.Theory of Propagation of Elastic Waves in a Fluid-saturated Porous Solid Ⅰ: Low-frequency Range[J].The Journal of the Acoustical Society of America,1956,28(2):168-178.

相似文献/References:

[1]柴 敬,张丁丁,李 毅.光纤传感技术在岩土与地质工程中的应用研究进展[J].建筑科学与工程学报,2015,32(03):28.
　CHAI Jing,ZHANG Ding-ding,LI Yi.Research Progress of Optical Fiber Sensing Technology in Geotechnical and Geological Engineering[J].Journal of Architecture and Civil Engineering,2015,32(01):28.
[2]吕奇峰,黄明利.岩土体弹性参数表面测试方法[J].建筑科学与工程学报,2011,28(04):116.
　LU Qi-feng,HUANG Ming-li.Test Method of Elastic Parameters on Surface of Rock and Soil[J].Journal of Architecture and Civil Engineering,2011,28(01):116.
[3]贾萍,赵均海,魏雪英,等.空间主动土压力双剪统一解的简化计算[J].建筑科学与工程学报,2008,25(02):85.
　JIA Ping,ZHAO Jun-hai,WEI Xue-ying,et al.Simplified Calculation of Twin-shear Unified Solution of Space Active Earth Pressure[J].Journal of Architecture and Civil Engineering,2008,25(01):85.
[4]陈之祥,李顺群,夏锦红,等.冻土导热系数测试和计算现状分析[J].建筑科学与工程学报,2019,36(02):101.
　CHEN Zhi-xiang,LI Shun-qun,XIA Jin-hong,et al.Test and Calculation Situation Analysis of Thermal Conductivity of Frozen Soil[J].Journal of Architecture and Civil Engineering,2019,36(01):101.
[5]田 威,张旭东,贾 能,等.石英粉对抗疏力固化剂改良黄土力学性能的影响[J].建筑科学与工程学报,2021,38(02):60.[doi:10.19815/j.jace.2020.07087]
　TIAN Wei,ZHANG Xu-dong,JIA Neng,et al.Influence of Quartz on Mechanical Property of Modified Loess with Consolid System[J].Journal of Architecture and Civil Engineering,2021,38(01):60.[doi:10.19815/j.jace.2020.07087]
[6]冯忠居,徐博熙,陈慧芸,等.不同溶洞处治措施对桩基承载特性的影响研究[J].建筑科学与工程学报,2024,41(04):151.[doi:10.19815/j.jace.2022.07011]
　FENG Zhongju,XU Boxi,CHEN Huiyun,et al.Study on influence of different treatment measures for karst caves on bearing characteristics of pile foundation[J].Journal of Architecture and Civil Engineering,2024,41(01):151.[doi:10.19815/j.jace.2022.07011]

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。

常用功能

更新日期/Last Update: 2011-03-20