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斜坡地基静力触探试验离散元分析

Discrete Element Method Analysis of Cone Penetration Tests on Sloping Ground
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摘要 通过二维离散元模拟斜坡地基静力触探试验,研究试验过程中锥尖阻力的变化以及斜坡地基的宏微观力学响应。结果表明:归一化锥尖阻力峰值在坡角较小时无明显提升,在坡角足够大时提升明显,稳定值随着坡角增大略微减小,说明斜坡边界对表层土力学性能影响明显,而对深层土影响较弱;锥尖贯入过程中,斜坡地基探杆两侧土体变形不对称,坡上一侧膨胀,坡下一侧压缩,不对称性随着坡角增大而增大;贯入到表层时,探杆两侧微观接触力链不对称,坡上一侧具有更大应力,但当贯入到深层时力链趋向于对称,其临界深度随着坡角增大而增大,与坡角呈近似线性关系。 Much investigative work has been conducted on cone penetration tests on flat ground; however, research on cone penetration tests on slopping ground is scarce. Two-dimensional dis- crete element method simulation of cone penetration tests on sloping ground were performed, in which the tip resistance and micro-macro mechanical behavior of the cut slope was studied. The experimental results showed that the peak value of the normalized tip resistance does not increase when the slope angle is below a specific value, but increases when the slope angle is high. Never- theless, the residual value decreases slightly with the increase of slope angle, indicating that the boundary of cut slope greatly affects the regolith, not the subsoil. As penetration proceeds, the deformation of the soil at the two sides of the cone is asymmetric with dilation on the upslope and compression on the downslope. This asymmetry increases with the slope angle. As the cone pene- trates into the regolith, the force chains at different sides of the cone are asymmetric with higher stress on the upslope. However, as the penetration proceeds into the subsoil, the force chains tend to be symmetric. The critical depth of penetration symmetry increases with slope angle forming a linear relationship.
作者 彭镝 蒋明镜
出处 《地震工程学报》 CSCD 北大核心 2015年第B07期57-62,共6页 China Earthquake Engineering Journal
关键词 斜坡地基 静力触探试验 离散单元法 锥尖阻力 宏微观力学特性 slopping ground cone penetration test discrete element method core resistance macro-micro mechanical behavior
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参考文献32

  • 1Frost J D,Martinez A.Axial-Torsional Multi-Sleeve Friction Penetration System for Lunar Subsurface Studies[C]//Earth and Space 2012@ struction,and Operations in Challenging Environments.ASCE,2012:335-343.
  • 2Firouzianbandpey S,Ibsen L B,Andersen L V.CPTU-based Geotechnical Site Assessment for Offshore Wind Turbines-a Case Study from the Aarhus Site in Denmark[C]//International O- cean and Polar Engineering Conference2012,2012:151-158.
  • 3Cheng Y,Liu S,Liu Z,et al.Seismic Cone Penetration Test As- sessment of Vibratory Probe Compaction for Liquefaction Mit- igation[C]//GeoCongress 2012@ sState of the Art and Prac- tice in Geotechnical Engineering.ASCE 2012:1898-1907.
  • 4Bol E.The Influence of Pore Prevssure Gradients in Soil Classifi- cation During Piezo Cone Penetration Test[J].Engineering Ge- ology,2013,157:69-78.
  • 5Tonni LiSimonini P.Shear Wave Velocity as Function of Cone Penetration Test Measurements in Sand and Silt Mixtures[J].Engineering Geology,2013,163:55-67.
  • 6Gui M W,Bolton M D,Garnier J,et al.Guidelines for Cone Penetration Tests in Sand[Cj//Proceedings of the Interna- tional Conference on Centrifuge Modelling (Centrifuge,98),Tokyo*Japan,1998:23-25.
  • 7Bolton M D,Gui M W,Garnier J,et al.Centrifuge Cone Pene- tration Tests in Sand[J].Geotechnique,1999,49:543-552.
  • 8Liu Q B,Lehane B M.The Influence of Particle Shape on the (Centrifuge) Cone Penetration Test (CPT) end Resistance in Uniformly Graded Granular Soils[J].Geotechnique,2012,62(11):973-984.
  • 9Huang A B,Hsu H H.Cone Penetration Tests Under Simula- ted Field Conditions[J].Geotechnique,2005,55(5):345-354.
  • 10Choi W S1Son Y H,Park J S,et al.Application of Penetration in Fall Cone Test to Estimate Relative Density with Variation of Water Content for Sand[J].Journal of The Korean Society of Agricultural Engineers,2012,54(5):69-77.

二级参考文献36

  • 1崔新壮,丁桦.静力触探锥头阻力的近似理论与实验研究进展[J].力学进展,2004,34(2):251-262. 被引量:15
  • 2刘松玉,吴燕开.论我国静力触探技术 (CPT)现状与发展[J].岩土工程学报,2004,26(4):553-556. 被引量:144
  • 3夏增明,蒋崇伦,孙渝文.静力触探模型试验及机理分析[J].长沙铁道学院学报,1990,8(3):1-10. 被引量:15
  • 4蒋明镜.用于触探试验分析的粒状材料本构模型之展望[J].岩土工程学报,2007,29(9):1281-1288. 被引量:9
  • 5MITCHELL J K, HOUSTON W N, SCOTT R F, et al. Mechanical properties of lunar soil: Density, porosity, cohesion, and angle of internal friction[C]// Proceedings of the Third Lunar Science Conference. Houston, 1972.
  • 6MITCHELL J K, CARRIER W D, COSTES N C, et al. Surface soil variability and stratigraphy at the Apollo 16 site[C]//Proceedings of the Fourth Lunar Science Conference Houston, 1973.
  • 7COSTES N C, MITCHELL J K. Apollo 11 soil mechanics investigation[C]//Proceedings of the Apollo 11 Lunar Science Conference. Houston, 1970.
  • 8HOUSTON W N, NAMIQ L I. Penetration resistance of lunarsoils[J]. Journal of Terranmechanics, 1971, 8(1): 59 - 69.
  • 9MELZER K J. Methods for investigating the strength characteristics of a lunar soil simulant[J]. G6otechnique, 1974, 24(1): 13 - 20.
  • 10COSTES N C, COHRON G T, MOSS D C. Cone penetration resistance test an approach to evaluating in-place strength and packing characteristics of lunar soils[C]//Proceedings of the Second Lunar Science Conference. Houston, 1971.

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