土工格栅加筋膨胀土边坡稳定性的分析方法及工程应用（英文）

发布时间：2021-10-26 09:35

　　传统土工格栅加筋边坡稳定性分析方法忽略了侧向膨胀作用对加筋体局部稳定性的影响,并不适用于膨胀土加筋边坡。本文提出了一种土工格栅加筋膨胀土边坡稳定性分析的新方法,在保证加筋边坡整体稳定的前提下,得到了自由区因侧向膨胀而产生的附加拔出力和各土工格栅层的抗拔安全系数。通过改变土工格栅加筋间距和长度,对湖北省某膨胀土路堑边坡进行了优化设计。结果表明,膨胀土侧向膨胀引起的附加拔出力对土工格栅的抗拔稳定性有很大影响,若不考虑自由区土体的膨胀效应,将高估加筋边坡的局部稳定性。 

【文章来源】：Journal of Central South University. 2020,27(07)EISCICSCD

【文章页数】：16 页

【文章目录】：
1 Introduction
2 Geogrid reinforced structure and calculation hypothesis
3 Stability analysis method of geogrid reinforced expansive soil slope
    3.1 Pullout force in free zone caused by soil swelling
    3.2 Pullout force in free zone caused by soil sliding
    3.3 Anchorage force in anchorage zone
    3.4 Anti-pullout safety factor of each geogrid layer
4 Determination of key parameters
    4.1 Lateral swelling parameters of soil
    4.2 Tensile parameters of geogrid
    4.3 Interface parameters between geogrid and soil
5 Engineering applications
    5.1 Engineering background
    5.2 Initial design and stability analysis of geogrid reinforced structure
        5.2.1 Determination of calculation parameters1)Lateral swelling parameters of soil
        5.2.2 Calculation of pullout force in free zone caused by swelling
        5.2.3 Calculation of pullout force in free zone caused by sliding
        5.2.4 Calculation of allowable anchorage force in anchorage zone
        5.2.5 Calculation of anti-pullout safety factor of each geogrid layer
        5.2.6 Discussion of results
    5.3 Structural optimization design
    5.4 Application of geogrid reinforced structure
6 Conclusions


【参考文献】：
期刊论文
[1]改进的膨胀土侧限膨胀试验研究[J]. 张锐,张博亚,郑健龙,刘正楠.  岩土工程学报. 2018(12)
[2]大型数控拉拔试验系统的研制及应用[J]. 杨和平,万亮,郑健龙.  岩土工程学报. 2007(07)
[3]降雨入渗条件下非饱和膨胀土边坡原位监测[J]. 詹良通,吴宏伟,包承纲,龚壁卫.  岩土力学. 2003(02)



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