失稳挡土墙加固数值分析

张友葩; 高永涛; 吴顺川; 方祖烈

失稳挡土墙加固数值分析

北京科技大学土木与环境工程学院, 北京 100083

详细信息

作者简介:
张友葩(1965-), 男, 山东平度人, 高级工程师, 博士研究生, 从事岩土工程失稳机理及加固技术研究

中图分类号: U417.11
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- 被引次数: 0
出版历程
- 收稿日期: 2003-02-17
- 刊出日期: 2003-04-25

Numerical analysis of reinforcement for unstable retaining wall

School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China

More Information

Author Bio:
ZHANG You-pa(1965-), male, senior engineer, doctoral student, 86-10-62391815, patarnn@vip.sina.com

摘要

摘要: 采用加筋喷射混凝土、高压注浆和预应力锚杆的联合加固方式, 对失稳挡土墙进行了加固, 同时对土边坡也利用微型抗滑桩和中高压注浆进行了加固。根据加固设计参数和各种材料属性, 利用有限差分法建立了数值计算模型, 对加固结构和被加固结构的稳定性(侧向位移的变化情况)以及预应力锚杆和抗滑桩的轴向力变化情况进行了模拟分析。结果表明, 各种不同类型的加固结构组成了一个有机整体, 完全可以保证边坡以及挡土墙稳定。
- 道路工程 /
- 挡土墙 /
- 失稳 /
- 数值分析 /
- 有限差分法
Abstract: According to the situations and the reasons of instability, the spray concrete with steel bar nets, preforced cables and cement grouting with high-pressure were adopted in the reinforcement design. Soil slope was also reinforced by mini-anti-sliding piles and cement grouting with middle-high pressure. A numerical calculation model was developed to analyze design parameters and materials properties. Using the model, the stability variations(displacement of side direction) of reinforcement structures and retaining wall, highway subgrade, soil slope as well as the axial force on the perforced cables and anti-sliding piles were analyzed. The analysis result shows the different types of reinforcement structure are integrated and formulated an organic entirety, and it is a very effective method to reinforce the unstable retaining wall.
- road engineering /
- retaining wall /
- instability /
- numerical analysis /
- finite difference method

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图 1 挡土墙断面

Figure 1. Vertical section of retaining wall

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图 2 加固方案

Figure 2. Reinforcement project

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图 3 求解循环

Figure 3. Calculation cycle

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图 4 挡土墙断面和梁单元的方向余弦

Figure 4. Cross-section of retaining wall and direction cosines for a beam element

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图 5 抗滑桩单元节点及剪切力和轴向位移关系

Figure 5. Nomenclature and shear force vs displacement for a pile element

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图 6 计算网格

Figure 6. Calculational grids plot

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图 7 模型材料属性和边界条件

Figure 7. Properties and boundary condition of numerical model

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图 8 加固结构单元

Figure 8. Structure element numbers

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图 9 加固结构节点

Figure 9. Structure node numbers

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图 10 锚杆轴向力曲线

Figure 10. Curves of axial force on cables

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图 11 抗滑桩轴向力曲线

Figure 11. Curves of axial force on anti-sliding piles

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图 12 锚杆水平位移曲线

Figure 12. Curves of X-displacement on cables

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图 13 抗滑桩水平位移曲线

Figure 13. Curves of X-displacement on anti-sliding piles

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图 14 挡土墙水平位移曲线

Figure 14. Curves of X-displacement on retaining wall

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图 15 边坡水平位移曲线

Figure 15. Curves of X-displacement on soil-slope

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图 16 公路路基水平位移曲线

Figure 16. Curves of X-displacement on highway-subgrade

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表 1 加固设计参数

Table 1. Proposal design parameters of reinforcement

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表 2 模型中材料的力学参数

Table 2. Proposal mechanical parameters of model

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参考文献(6)

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[2]	张友葩, 高永涛, 方祖烈, 等. 交通载荷下挡土墙的失稳分析[J]. 北京科技大学学报, 2003, 25(1): 12-17. https://www.cnki.com.cn/Article/CJFDTOTAL-BJKD200301005.htm Zhang Youpa, Gao Yongtao, Fang Zulie, et al. Instability mech-anism analysis of retaining walls under stochastic vehicles load-ing condition[J]. Journal of University of Science and Technology Beijing, 2003, 25(1): 12-17. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-BJKD200301005.htm
[3]	李仁平, 陈仁朋, 陈云敏. 阻滑桩加固土坡的极限设计方法[J]. 浙江大学学报, 2001, 35(6): 618-622. doi: 10.3785/j.issn.1008-973X.2001.06.008 Li Renping, Chen Renpeng, Chen Yunmin. Design method for slope with stabilizing pile[J]. Journal of Zhejiang University, 2001, 35(6): 618-622. (in Chinese) doi: 10.3785/j.issn.1008-973X.2001.06.008
[4]	Hakami H. Rock characterisation facility (RCF) shaft sinking-numerical computations using FLAC[J]. International Journal of Rock Mechanics & Mining Sciences, 2001, 38(1): 59-65.
[5]	龚晓南. 土工计算机分析[M]. 北京: 中国建筑工业出版社, 2000.
[6]	Chungsik Yoo. Behaviour of braced and anchored walls in soils overlying rock[J]. Journal of Geotechnical and Geoenviron-mental Engineering (ASCE), 2001, 127(3): 225-232.