傳統(tǒng)土工格柵加筋邊坡穩(wěn)定性分析方法忽略了側向膨脹作用對加筋體局部穩(wěn)定性的影響,并不適用于膨脹土加筋邊坡。本文提出了一種土工格柵加筋膨脹土邊坡穩(wěn)定性分析的新方法,在保證加筋邊坡整體穩(wěn)定的前提下,得到了自由區(qū)因側向膨脹而產生的附加拔出力和各土工格柵層的抗拔安全系數。通過改變土工格柵加筋間距和長度,對湖北省某膨脹土路塹邊坡進行了優(yōu)化設計。結果表明,膨脹土側向膨脹引起的附加拔出力對土工格柵的抗拔穩(wěn)定性有很大影響,若不考慮自由區(qū)土體的膨脹效應,將高估加筋邊坡的局部穩(wěn)定性。 

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

【文章頁數】：16 頁

【文章目錄】：
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


【參考文獻】：
期刊論文
[1]改進的膨脹土側限膨脹試驗研究[J]. 張銳,張博亞,鄭健龍,劉正楠.  巖土工程學報. 2018(12)
[2]大型數控拉拔試驗系統(tǒng)的研制及應用[J]. 楊和平,萬亮,鄭健龍.  巖土工程學報. 2007(07)
[3]降雨入滲條件下非飽和膨脹土邊坡原位監(jiān)測[J]. 詹良通,吳宏偉,包承綱,龔壁衛(wèi).  巖土力學. 2003(02)



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