东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2008, Vol. 29 ›› Issue (3): 403-407.DOI: -

• 论著 • 上一篇    下一篇

浅基础宽度修正对黏性土地基承载力的影响

刘忠昌;朱浮声;王新;刘文华;   

  1. 东北大学资源与土木工程学院;东北大学资源与土木工程学院;辽宁省建筑设计研究院;东北大学资源与土木工程学院 辽宁 沈阳 110004;辽宁 沈阳 110004 沈阳建筑大学土木工程学院;辽宁 沈阳 110168;辽宁 沈阳 110005;辽宁 沈阳 110004
  • 收稿日期:2013-06-22 修回日期:2013-06-22 出版日期:2008-03-15 发布日期:2013-06-22
  • 通讯作者: Liu, Z.-C.
  • 作者简介:-
  • 基金资助:
    辽宁省自然科学基金(20021008);;

Effect of width correction of shallow foundation on bearing capacity of cohesive subsoil

Liu, Zhong-Chang (1); Zhu, Fu-Sheng (1); Wang, Xin (3); Liu, Wen-Hua (1)   

  1. (1) School of Resources and Civil Engineering, Northeastern University, Shenyang 110004, China; (2) School of Civil Engineering, Shenyang Jianzhu University, Shenyang 110168, China; (3) Liaoning Provincial Building Design and Research Institute, Shenyang 110005, China
  • Received:2013-06-22 Revised:2013-06-22 Online:2008-03-15 Published:2013-06-22
  • Contact: Liu, Z.-C.
  • About author:-
  • Supported by:
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摘要： 通过沈阳市黏性土地基不同压板尺寸平板载荷试验结果的对比分析,提出了承载力考虑尺寸效应的基础宽度修正的新方法.然后分析了各种压板(基础)尺寸的沉降计算值和试验值,指出黏性土地基承载力取值应以变形作为控制指标.对于中、高压缩性土,地基的实际沉降一般大于按分层总和法计算的沉降,尤其是基础宽度愈大,其差异愈明显.针对目前设计中存在的问题,对地基承载力设计取值进行了全面分析,提出了基础工程的概念设计.试验结果表明,随压板宽度增加,黏性土地基承载力呈幂函数规律衰减.

关键词: 黏性土地基, 平板载荷试验, 宽度修正, 承载力特征值, 尺寸效应系数

Abstract: A new method taking account of the effect of foundation dimensions on the bearing capacity of cohesive subsoil is proposed, based on the foundation loading tests which were done on two areas of cohesive subsoil in Shenyang City with loading plates of different dimensions used as foundations. The settling amount under the action of loading plates of different widths were measured and calculated, and the comparative analysis indicated that the control index of bearing capacity of cohesive subsoil should be taken from the deformation values of cohesive subsoil. The actual settling amount of highly/intermediately compressed subsoil is generally greater than that calculated by layered summation, and the bigger the width of foundation, the greater the discrepancy between the actual and calculated settling amount. An overall analysis was therefore made to the values taken for the bearing capacity of subsoil in design in view of the existing design problems. And a conceptual design is proposed for foundation engineering. Testing results showed. that bearing capacity of cohesive subsoil decreases exponentially with the increasing width of loading plates.

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