[1]赵志峰,赵振梁,王浩越.不排水条件下坡上条形基础的承载力[J].南京林业大学学报(自然科学版),2017,41(06):211-215.[doi:10.3969/j.issn.1000-2006.201605064]
 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(06):211-215.[doi:10.3969/j.issn.1000-2006.201605064]
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不排水条件下坡上条形基础的承载力
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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06期
页码:
211-215
栏目:
研究简报
出版日期:
2017-11-30

文章信息/Info

Title:
Study on the undrained bearing capacity of strip footing on slope
文章编号:
1000-2006(2017)06-0211-05
作者:
赵志峰1赵振梁2王浩越2
1. 南京林业大学土木学院,江苏 南京 210037; 2. 河海大学土木与交通学院,江苏 南京 210098
Author(s):
ZHAO Zhifeng1 ZHAO Zhenliang2 WANG Haoyue2
1. College of Civil Engineering, Nanjing Forestry University, Nanjing 210037, China; 2. College of Civil and Transportation Engineering, Hohai University, Nanjing 210098, China
关键词:
不排水边坡 条形基础 承载力系数 数值分析
Keywords:
Keywords:undrained slope strip footing bearing capacity coefficient numerical analysis
分类号:
TU433
DOI:
10.3969/j.issn.1000-2006.201605064
文献标志码:
A
摘要:
【目的】对不排水条件下坡上条形基础的极限承载力进行研究,分析承载力系数的变化规律,以及土体归一化强度、边坡坡角、基础距坡顶的相对距离等参数对承载力系数的影响。【方法】采用数值模拟和理论分析相结合的方法。【结果】土体归一化强度对坡上基础的破坏模式有直接影响,当归一化强度小于某临界值时,不建议在坡上修建建筑物。研究还发现,坡上基础的承载力受土体和边坡等多种因素的影响,很难从结果中直接整理得到承载力的计算公式。为了得到坡上条形基础承载力的理论解,引入了极限分析的上限解,推导出坡上条形基础承载力系数的计算公式,并对公式进行了合理的简化。将不同参数组合下的数值模拟结果同公式计算结果进行了对比,结果表明,大部分误差在6%以内,尤其是当土体强度较高时,误差较小。【结论】所模拟公式计算结果的准确性较高且使用方便,可用于计算不排水条件下坡上条形基础的承载力。
Abstract:
【Objective】The ultimate undrained bearing capacity of the strip footing on slopes is studied using numerical simulation and theoretical analysis. 【Method】First, the numerical model of the strip footing on a slope is built to consider the change in the undrained bearing capacity coefficient. Then, after verifying the reliability of the numerical computation, the influences of several parameters on the bearing capacity, such as the normalized soil strength, slope angle, and relative distance of the footing to the slope crest are studied. 【Result】It is found that the collapse mode of the footing is related to the normalized soil strength, and the slope is not suitable for structure construction when the normalized soil strength is below the critical value. The results also indicate that all the factors pertaining to the soil and slope have a significant influence on the bearing capacity of the footing on the slope. Therefore, it is difficult to obtain a computation formula only using the numerical analysis results. To obtain a theoretical solution for the bearing capacity of the footing on a slope, the upper bound theory of limit analysis is employed to derive a specific formula for the capacity coefficient, and simplified for easy practical use. The results for the bearing capacity coefficient obtained by numerical simulation with different combinations of parameters are compared with the calculation results of the derived formula to conform the accuracy of the theoretical derivation. 【Conclusion】The comparison shows the high accuracy of the theoretical formula; thus it can be applied in the computation of the bearing capacity of strip footings on slopes.

参考文献/References:

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备注/Memo

备注/Memo:
基金项目:国家自然科学基金青年项目(51508279)
更新日期/Last Update: 1900-01-01