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考虑土体超固结特性及拉压模量的球孔扩张解答

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Keywords: 道路工程,土体,修正剑桥模型,球孔扩张,超固结比,拉压模量

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Abstract:

?为了研究土体超固结特性、拉压模量及拉压泊松比差异等因素对球孔扩张的影响,将球孔扩张周围的土体分为弹性区和塑性区,在弹性区采用小变形理论,在塑性区采用大变形理论和修正剑桥模型,推导出考虑以上因素的塑性区半径、临塑扩孔压力以及极限扩孔压力的理论解答。研究结果表明:塑性区半径随着超固结比β的增大而逐渐减小,临界扩孔压力以及极限扩孔压力随超固结比β的增大而呈非线性增大;拉压泊松比v-/v+越小,临界扩孔压力越大,塑性区开展半径越小;临界扩孔压力随着拉压模量比E-/E+的增大而不断减小,塑性区半径随E-/E+的增大而不断增大;考虑以上因素能更加经济、合理地指导工程设计。

References

[1]  胡 伟,黄 义,刘增荣,等.饱和粘土中挤土桩球形孔扩张的弹塑性分析[J].工程力学,2008,25(8):180-187.
[2]  HU Wei,HUANG Yi,LIU Zeng-rong,et al.Elastic-plastic Solution of Sphere Cavity Expansion of Soil Compaction Pile in Saturated Clay[J].Engineering Mechanics,2008,25(8):180-187.
[3]  SALGADO R,MITCHELL J K,JAMIOLKOWSKI M.Cavity Expansion and Penetration Resistance in Sand[J].Journal of Geotechnical and Geoenvironmental Engineering,1997,123(4):344-353.
[4]  CHAI J C,CARTER J P,MIURA N,et al.Improved Prediction of Lateral Deformations Due to Installation of Soil-cement Columns[J].Journal of Geotechnical and Geoenvironmental Engineering,2009,135(12):1836-1845.
[5]  CHAI J C,MIURA N,KOGA H.Lateral Displacement of Ground Caused by Soil-cement Column Installation[J].Journal of Geotechnical and Geoenvironmental Engineering,2005,131(5):623-632.
[6]  CHANG M F,TEH C I,CAO L F.Undrained Cavity Expansion in Modified Cam ClayⅡ:Application to the Interpretation of the Piezocone Test[J].Geotechnique,2001,51(4):335-350.
[7]  王启铜,龚晓南,曾国熙.考虑土体拉、压模量不同时静压桩的沉桩过程[J].浙江大学学报:自然科学版,1992,26(6):678-687.
[8]  WANG Qi-tong,GONG Xiao-nan,ZENG Guo-xi.Pile Jacking in a Soil Mass with Different Elastic Moduli in Tension and Compression[J].Journal of Zhejiang University:Natural Science,1992,26(6):678-687.
[9]  罗战友,杨晓军,龚晓南.考虑材料的拉压模量不同及应变软化特性的柱形孔扩张问题[J].工程力学,2004,21(2):40-45.
[10]  LUO Zhan-you,YANG Xiao-jun,GONG Xiao-nan.Expansion of Cylindrical Cavities in Strain-softening Material with Different Elastic Moduli in Tension and Compression[J].Engineering Mechanics,2004,21(2):40-45.
[11]  郑俊杰,鲁燕儿,陈保国.拉压模量不同的剪胀土体中的球孔扩张问题[J].岩土工程学报,2009,31(5):675-680.
[12]  ZHENG Jun-jie,LU Yan-er,CHEN Bao-guo.Spherical Cavity Expansion in Dilatant Soils with Different Tension and Compression Moduli[J].Chinese Journal of Geotechnical Engineering,2009,31(5):675-680.
[13]  CAO L F,TEH C I,CHANG M F.Undrained Cavity Expansion in Modified Cam ClayⅠ:Theoretical Analysis[J].Geotechnique,2001,51(4):323-334.

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