全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...
工程力学  2013 

大型基础下层状砂土静力变形性状测试

DOI: 10.6052/j.issn.1000-4750.2012.07.0479, PP. 217-222

Keywords: 层状砂土地基,交变应力,变形,有效附加应力,软弱夹层

Full-Text   Cite this paper   Add to My Lib

Abstract:

结合工程实测,模拟分析了大型基础下层状砂土地基基底有效附加应力、基础内钢筋应力以及基底竖向变形的变化过程与分布规律。研究结果表明,受基坑降水影响,基底上覆土层有效应力增量对基底沉降的贡献不可忽略;基底压应力不能简单假设为均布荷载,基底最大应力作用点不一定就是最大沉降发生点;基底平面上沉降分布不均匀,基础中心点处的沉降也不一定最大;施工加载期间,基础内钢筋应力呈现交变状态,但钢筋强度发挥有限,仅为其屈服强度的25%;砂土沉降计算经验系数随土层变形模量的增大而减小,但减小幅度不显著。研究结论可为层状砂土地基及其上大型基础设计提供直接参考依据。

References

[1]  GB 5007-2002,建筑地基基础设计规范[S]5007-2002, 建筑地基基础设计规范[S].北京:中国标准出版社, 2001.GB 5007-2002,Code for design of building foundation [S]5007-2002, Code for design of building foundation [S].Beijing:Standards Press of China, 2001. (in Chinese)
[2]  GB 50011-2001,建筑抗震设计规范[S]50011-2001, 建筑抗震设计规范[S].北京:中国标准出版社, 2001.GB 50011-2001,Code for seismic design of buildings [S]50011-2001, Code for seismic design of buildings [S].Beijing:Standards Press of China, 2001. (in Chinese)
[3]  GB 50010-2002,混凝土结构设计规范[S]50010-2002, 混凝土结构设计规范[S].北京:中国标准出版社, 2002.GB 50010-2002,Code for design of concrete structures [S]50010-2002, Code for design of concrete structures [S].Beijing:Standards Press of China, 2002. (in Chinese)
[4]  Das B M. Shallow foundations: bearing capacity and settlement [M]. Florida: CRC Press LLC, 1999: 254―265
[5]  Merlos J,Romo M P. Fluctuant bearing capacity of shallow foundations during earthquakes [J]. Soil Dynamics and Earthquake Engineering, 2006, 26: 103―114.
[6]  Abdul-Hamid Soubra,Dalia S. Youssef Abdel Massih and Mikael Kalfa. Bearing capacity of foundations resting on a spatially random soil [J]. Geosustainability and Geohazard Mitigation, 2008, 16(1): 66―73.
[7]  Kenny M J,Andrawes K Z. The bearing capacity of footings on a sand layer overlying soft clay [J]. Institution of Civil Engineers, 1997, 28: 339―345.
[8]  John P Wolf,Andrew J Deeks. Foundation vibration analysis: A strength of materials approach [S]. Linacre House, Jordan Hill, Oxford OX2 8DP 200 Wheeler Road, Burlington: 01803, 2004.
[9]  Ohara S,Matsuda H. Study on the settlement of saturated clay layer induced by cyclic shear [J]. Soils and Foundations, 1988, 28: 103―113.
[10]  Minna Karstunen,Martino Leoni. Geotechnics of soft soils: Focus on ground improvement [S]. London: Taylor and & Francis Group, 2009.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133