坑内预留土作用下多支点支护结构的变形内力计算

张浩; 郭院成; 石名磊; 马珍珍

doi:10.11779/CJGE201801017

坑内预留土作用下多支点支护结构的变形内力计算 English Version

1.郑州大学土木工程学院,河南郑州 450001
2.东南大学交通学院,江苏南京 210096
3.武陟第一黄河河务局,河南焦作 454950

基金项目: 国家自然科学基金项目（51608490）；河南省高等学校重点科研项目（16A560009）；河南省博士后科研项目（2015014）

详细信息

作者简介:
张浩(1985-),男,讲师,主要从事地基与基础工程方面的教学和研究。E-mail:tmzhanghao@zzu.edu.cn。

中图分类号: TU473.1
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出版历程
- 收稿日期: 2016-10-13
- 发布日期: 2018-01-24

Calculation of deformation and internal force of multi-pivot retaining structure considering influence of earth berm

1.School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, China
2.School of Transportation, Southeast University, Nanjing 210096, China
3.First Yellow River Bureau of Wuzhi County, Jiaozuo 454950, China

摘要

摘要: 基坑围护结构内侧预留土可有效减小围护结构内力和变形,且设置灵活,在工程中应用日益广泛。为了分析坑内预留土对多支点支护结构的作用效应,首先,基于三参数地基弹性梁模型,根据支护结构沿竖向受力模式的不同,给出了一种考虑坑内预留土作用影响的计算分析模型及控制方程组;在此基础上,通过桩身离散和矩阵传递法,推导建立了多支点支护结构内力变形计算的矩阵表达式,并给出半解析解答方法;最后,采用该方法对工程实例进行计算,并对坑内预留土设置宽度、高度的影响规律进行了分析,验证了方法的可行性,可为支护工程设计施工提供参考。
- 基坑工程 /
- 预留土 /
- 多支点支护结构 /
- 理论计算 /
- 半解析解
Abstract: Setting earth berm for retaining structures can effectively reduce their internal force and deformation, and it is flexible. This method has been widely used in engineering. In order to analyze the effect of earth berm on multi-pivot retaining structures, firstly, based on the tri-parameter foundation model, according to different stress patterns of the vertical retaining structures, a computational analysis model considering influence of earth berm and the governing equations are proposed. Moreover, combining the pile discrete method with the matrix transfer method, the matrix expressions for the internal force and deformation of retaining structures are derived, and the semi-analytical solution method is obtained. Finally, by calculating an excavation project and analyzing the influences of the width and height of the earth berm, the rationality of the proposed method is verified, and it can provide reference for the design and construction of retaining structures.
- foundation pit engineering /
- earth berm /
- multi-pivot retaining structure /
- theoretical calculation /
- semi-analytical solution

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参考文献(11)

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