| 基桩桩端平面下竖向均化附加应力研究及应用 |
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| 引用本文： | 王涛,褚卓,刘金砺,王旭.基桩桩端平面下竖向均化附加应力研究及应用[J].土木工程学报,2021,54(9):96-104. |
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| 作者姓名： | 王涛 褚卓 刘金砺 王旭 |
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| 作者单位： | 1. 建筑安全与环境国家重点实验室，北京 100013；
2. 中国建筑科学研究院有限公司地基基础研究所，北京 100013；
3. 北京市地基基础与地下空间开发利用工程技术研究中心，北京 100013；4. 国家建筑工程技术研究中心，北京 100013 |
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| 摘 要： | 文章基于Mindlin解附加应力场和群桩基础变形分布特征，考虑基桩投影面范围附加应力的差异效应，在现有Mindlin解分层总和法计算群桩基础沉降基础上，提出基桩均化附加应力计算方法。针对特定侧阻分布概化模式给出不同长径比、不同桩距条件下的基桩均化附加应力系数表格，为手算群桩基础沉降所需的均化附加应力计算提供有效的简易方法。文中提供的均化附加应力计算方法计算群桩沉降，通过工程实例验证，与Boussinesq实体深基础计算法和等效作用计算法比较，其沉降计算值与实测竣工沉降值较为接近。
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| 关 键 词： | 侧阻力 端阻力 概化模式 Mindlin应力解 均化附加应力系数 沉降计算 |
Research and application of vertical homogenized additional stress under pile tip plane |
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| Wang Tao Chu Zhuo Liu Jinli Wang Xu.Research and application of vertical homogenized additional stress under pile tip plane[J].China Civil Engineering Journal,2021,54(9):96-104. |
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| Authors: | Wang Tao Chu Zhuo Liu Jinli Wang Xu |
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| Affiliation: | 1. State Key Laboratory of Building Safety and Built Environment, Beijing 100013, China;
2. China Academy of Building Research Foundation Institute, Beijing 100013, China；
3. Beijing Engineering Technology Research Center of Foundation and City Underground Space Development and Utilization,Beijing 100013, China；
4. National Engineering Research Center of Building Technology,Beijing 100013, China |
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| Abstract: | Considering the Mindlin stress solution additional stress field and the deformation distribution characteristics of pile group foundation, and the difference effect of additional stress in the projection area of pile, this paper presents a new method for calculating the homogenized additional stress of pile group foundation. According to the conceptualization model for specific shaft resistance distribution, the foundation pile homogenization stress coefficient table is given under the condition of different ratio of length to diameter and different pile spacing, thus an effective simple method is provided for the additional stress calculation in settlement analysis of group piles foundation. The proposed calculation method is verified by some engineering examples. The analysis results by the equivalent calculation method are compared with those by the Boussinesq deep foundation calculation method and equivalent calculation method. The analysis results agree well with each other, which proves the effectiveness of the proposed method. |
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| Keywords: | shaft resistance tip resistance conceptualization mode Mindlin stress solution homogenized additional stress coefficient settlement calculation |
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