增强型离心桩施工引起的超静孔隙水压力分析

付贵海; 魏丽敏; 王永和; 周慧

doi:10.13204/j.gyjz201102012

增强型离心桩施工引起的超静孔隙水压力分析

doi: 10.13204/j.gyjz201102012

1.
1. 中南大学土木建筑学院,长沙 410075;
2.
2. 湖南城市学院土木工程学院,湖南益阳 413000;
3.
3. 湖南城市学院城市管理学院,湖南益阳 413000

基金项目:

铁道部科技研究开发计划重点课题(2009G008-B2010G018-F-3)

详细信息

作者简介:
付贵海，男，1975年出生，博士研究生，讲师。E－mail：fugui6666@126.com

中图分类号: TU753.3
计量
- 文章访问数: 77
- HTML全文浏览量: 11
- PDF下载量: 111
- 被引次数: 0
出版历程
- 收稿日期: 2010-09-05
- 刊出日期: 2011-02-20

ANALYSIS OF EXCESS PORE WATER PRESSURE CAUSED BY CONSTRUCTION OF SINGLE ENHANCEMENT CENTRIFUGAL PIPE

1.
1. College of Civil and Architectural Engineering,Central South University,Changsha 410075,China;
2.
2. College of Civil Engineering,Hunan City University,Yiyang 413000,China;
3.
3. College of City Management Engineering,Hunan City University,Yiyang 413000,China

摘要

摘要: 在深厚软土地区采用锤击法进行预应力管桩施工，由于土体受到剧烈扰动及软土较差的渗透性，会在桩周软土中产生很高的超静孔隙水压力。通过对现场实测超静孔隙水压力资料的分析和整理，探讨增强型离心桩施工产生的超静孔隙水压力在径向及深度上的分布规律，研究单桩施工不同时刻超静孔隙水压力变化规律。分析结果表明：单桩的沉桩显著影响范围为17.5倍桩径，超静孔隙压力的峰值并不一定出现在末节管桩施工结束后，另外，增强型离心桩单桩施工产生的超静孔隙水压力比普通的预应力管桩产生的超静孔隙水压力消散得快，在施工结束4h后，可以消散70%～80%。
- 软土 /
- 增强型离心桩 /
- 单桩 /
- 沉桩 /
- 超静孔隙水压力
Abstract: Prestressed concrete pipes construction by hammer can produce high excess pore water pressure in deep soft soils because of violent disturbance and poor permeability of soft soil.Through analyzing the data of excess pore pressure in sites,it was analysed excess pore pressures distribution distance against the pile and along depth,and was also studied excessive pore water pressure change in different time of single pile construction.The analysis results show that the notable influencing range of single pile construction is about 17.5 times of the pile diameter,and the peak excess pore pressure does not necessarily appear at the end of the last section pile construction,and excess pore water pressure caused by the construction of single enhancement centrifugal pile dissipates faster than that induced by normal prestressed concrete,and 70% to 80% excess pore water pressure can be dissipated after 4 hours in the end of single pile construction.
- soft soils /
- enhancement centrifugal pile /
- single pile /
- piles-driving /
- excess pore water pressure

HTML全文

参考文献(12)

史玉良.预制节桩的荷载试验及荷载传递性能分析[J].工业建筑, 1993, 23(7):3－20;

[2] 史桃开, 徐攸在.新型桩节桩承载力及抗液化特性[J].工程抗震, 1991(2):18－41;

[3] 王育兴, 孙钧.打桩施工对周围土性及孔隙水压力的影响[J].岩石力学与工程学报, 2004, 23(1):153－158;

[4] Chun F.Radhakrishnan L R, Siew-Ann Tan.Performance ofPrecast Driven Piles in Marine Clay[J].Journal of Geotechnicaland Geoenvironmental Engineering, 1991, 117:637－657;

[5] Lehane B M, Jardine R J.Displacement Pile Behaviour in a SoftMarine Clay[J].Canadian Geotechnical Journal, 1994, 31(1):181－191;

[6] 唐世栋, 何连声, 傅纵.软土地基中单桩施工引起的超孔隙水压力[J].岩土力学, 2002, 23(6):725－732;

[7] 朱向荣, 何耀辉.饱和软土单桩沉桩超孔隙水压力分析[J].岩石力学与工程学报, 2005, 24(增刊2):5740－5744;

[8] Pestana J M.Soil Deformation and Excess Pore Pressure FieldAround a Closed-Ended Pile[J].Journal of Geotechnical andGeoenvironmental Engineering, 2002, 128(1):1－12;

[9] Randloph M F, Cater J P, Wroth C P.Driven Pile in ClayTheEffects of in Stallation and Subsequent Consolidation[J].Geotechnique, 1979, 129(4):361－393;

[10] 余闯, 杜广印, 刘松玉.预应力薄壁管桩群桩施工引起的超静孔隙水压力试验研究[J].工业建筑, 2009, 39(8):69－71;

[11] 姜朋明, 吕云霞, 胡中雄.群桩施工中孔隙水压力变化规律及其影响[J].四川建筑科学研究, 2008, 34(5):128－130;

[12] 张建新, 赵建军, 孙世光.群桩沉桩引起的超孔隙水压力的室内模型及试验分析[J].工业建筑, 2009, 39(1):76－78.

施引文献

资源附件(0)

访问统计