[1]赵志峰,彭邦阳.软黏土上覆砂层的条形基础承载力分析[J].南京林业大学学报(自然科学版),2017,41(03):171-174.[doi:10.3969/j.issn.1000-2006.2017.03.026]
 ZHAO Zhifeng,PENG Bangyang.Computation of bearing capacity of strip footing on sand overlying soft clay soil[J].Journal of Nanjing Forestry University(Natural Science Edition),2017,41(03):171-174.[doi:10.3969/j.issn.1000-2006.2017.03.026]
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软黏土上覆砂层的条形基础承载力分析/HTML
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《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

卷:
41
期数:
2017年03期
页码:
171-174
栏目:
研究论文
出版日期:
2017-05-31

文章信息/Info

Title:
Computation of bearing capacity of strip footing on sand overlying soft clay soil
文章编号:
1000-2006(2017)03-0171-04
作者:
赵志峰彭邦阳
南京林业大学土木工程学院,江苏 南京 210037
Author(s):
ZHAO ZhifengPENG Bangyang
College of Civil Engineering, Nanjing Forestry University, Nanjing 210037, China
关键词:
软土上覆砂层 条形基础 极限承载力 计算模型
Keywords:
sand overlying clay strip footing bearing capacity computation model
分类号:
TU433
DOI:
10.3969/j.issn.1000-2006.2017.03.026
摘要:
【目的】对软黏土上覆砂层的条形基础承载力进行分析,为土层存在软弱下卧层情况下的浅基础设计提供理论参考。【方法】采用理论推导的方法,在扩散投影模型的基础上,根据基础下方砂土层微元体的受力分析,推导出砂层下卧黏土层时条形基础的极限承载力计算公式,并给出了参数取值建议。【结果】根据分析,基础宽度、砂土层厚度、砂土层强度、黏土层强度、荷载扩散角等因素都对浅基础的极限承载力有一定影响,在建立的模型中对这些因素均进行考虑。为验证该模型的有效性,对已有的离心机试验模型进行了计算,得出用推导的公式计算出的极限承载力与离心机试验数据十分接近,模型相对误差均小于10%。【结论】该公式可用于软黏土上覆砂层时的条形基础承载力计算。
Abstract:
【Objective】 The analysis of the bearing capacity of a strip foundation under the circumstance of sand overlying soft clay can provide a reference to the design of shallow footing where weak subsoil exists. 【Method】A theoretical derivation method is applied on the basis of the spread projection model, and the computation formula of strip footing bearing capacity on sand overlying clay soil is derived according to the stress analysis of the sand element beneath the footing. 【Result】 For the convenience of calculation, the determined parameters in the formula are given. According to the analysis, factors such as footing width, the thickness of the sand layer, the shear strength of sand and clay and the spread angle of the load have an influence on the bearing capacity, and they are considered in the formula. To prove the effectiveness of the formula, the bearing capacities of centrifuge models in the classic articles are calculated by the derived formula. 【Conclusion】The comparison shows that the relative errors between the formula and centrifuge experimental tests are less than 10%, indicating that the formula can be applied in computing the bearing capacity of strip footing on sand overlying soft clay.

参考文献/References:

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 ZHAO Zhifeng,ZHAO Zhenliang,WANG Haoyue.Study on the undrained bearing capacity of strip footing on slope[J].Journal of Nanjing Forestry University(Natural Science Edition),2017,41(03):211.[doi:10.3969/j.issn.1000-2006.201605064]

备注/Memo

备注/Memo:
收稿日期:2016-02-01 修回日期:2016-06-28
基金项目:国家自然科学基金青年项目(51508279)
第一作者:赵志峰(zzf0911@163.com),副教授,博士。
引文格式:赵志峰,彭邦阳. 软黏土上覆砂层的条形基础承载力分析[J]. 南京林业大学学报(自然科学版),2017,41(3):171-174.
更新日期/Last Update: 2017-05-20