Geomechanics and Engineering

  • 제15권6호
  • /
  • Pages.1143-1151
  • /
  • 2018
  • /
  • 2005-307X(pISSN)
  • /
  • 2092-6219(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Compaction techniques and construction parameters of loess as filling material

  • Hu, Chang-Ming (College of Civil Engineering, Xi'an University of Architecture and Technology) ;
  • Wang, Xue-Yan (College of Civil Engineering, Xi'an University of Architecture and Technology) ;
  • Mei, Yuan (College of Civil Engineering, Xi'an University of Architecture and Technology) ;
  • Yuan, Yi-Li (College of Civil Engineering, Xi'an University of Architecture and Technology) ;
  • Zhang, Shan-Shan (College of Civil Engineering, Xi'an University of Architecture and Technology)
  • 투고 : 2016.12.07
  • 심사 : 2018.04.02
  • 발행 : 2018.08.30
⟨ 이전 논문 다음 논문 ⟩

초록

Loess often causes problems when used as a filling material in the construction of foundations. Therefore, the compaction technique, shear behavior, and bearing capacity of a filled foundation should be carefully considered. A series of tests was performed in this study to obtain effective compaction techniques and construction parameters. The results indicated that loess is strongly sensitive to water. Thus, the soil moisture content should be kept within 12%-14% when it is used as a filling material. The vibrating-dynamic combination compaction technique is effective and has fewer limitations than other methods. In addition, the shear strength of the compacted loess was found to increase linearly with the degree of compaction, and the soil's compressibility decreased rapidly with an increase in the degree of compaction when the degree of compaction was less than 95%. Finally, the characteristic value of the bearing capacity increased with an increase in the degree of compaction in a ladder-type way when the degree of compaction was within 92%-95%. Based on the test data, this paper could be used as a reference in the selection of construction designs in similar engineering projects.

키워드

과제정보

연구 과제 주관 기관 : National Natural Science Foundation of China

참고문헌

  1. Chen, K.S. and Sha, A.M. (2010), "Study of deformation characteristic of compacted loess", Rock Soil Mech., 31(4), 1023-1030.
  2. Cheng, H.T., Liu, B.J. and Xie, Y.L. (2008), "Stress-strain-time behavior of compacted loess", J. Chang'an Univ. (Nat. Sci. Edit.), 28(1), 6-9.
  3. Daehyeon, K. and Kang, S.S. (2013), "Engineering properties of compacted loesses as construction materials", J. Civil Eng., 17(2), 335-341.
  4. El Mosallamy, M., El Fattah, T.T.A. and El Khouly, M. (2016), "Experimental study on the determination of small strain-shear modulus of loess soil", HBRC J., 12(2), 181-190. https://doi.org/10.1016/j.hbrcj.2014.11.010
  5. Feng, S.J., Du, F.L., Shi, Z.M, Shui, W.H. and Tan, K. (2015), "Field study on the reinforcement of collapsible loess using dynamic compaction", Eng. Geol., 185(2), 105-115. https://doi.org/10.1016/j.enggeo.2014.12.006
  6. Kozubal, J. and Steshenko, D. (2015), "The complex compaction method of an unstable loess substrate", Arab. J. Geosci., 8(8), 6189-6198. https://doi.org/10.1007/s12517-014-1654-x
  7. Liang, Q.G., Li, J., Wu, X.Y. and Zhou, A.N. (2015), "Anisotropy of $Q_2$ loess in the Baijiapo tunnel on the Lanyu railway, China", Bull. Eng. Geol. Environ., 75(1), 109-124.
  8. Luo, Y., Wang, T.H., Liu, X.J. and Zhang, H. (2014), "Laboratory study on shear strength of loess joint", Arab. J. Sci. Eng., 39(8), 7549-7554. https://doi.org/10.1007/s13369-014-1318-x
  9. Mei, Y., Hu, C.M., Yuan, Y.L., Wang, X.Y. and Zhao, N. (2016), "Experimental study on deformation and strength property of compacted loess", Geomech. Eng., 11(1), 161-175. https://doi.org/10.12989/gae.2016.11.1.161
  10. Qian, Z.Z., Lu, X.L., Yang, W.Z. and Cui, Q. (2014), "Behaviour of micropiles in collapsible loess under tension or compression load", Geomech. Eng., 7(5), 477-493. https://doi.org/10.12989/gae.2014.7.5.477
  11. Qian, Z.Z., Lu, X.L., Yang, W.Z. and Cui, Q. (2016), "Comparative field tests on uplift behavior of straight-sided and belled shafts in loess under an arid environment", Geomech. Eng., 11(1), 141-160. https://doi.org/10.12989/gae.2016.11.1.141
  12. Ren, X.C., Lai, Y.M., Zhang, F.Y. and Hu, K. (2015), "Test method for determination of optimum moisture content of soil and maximum dry density", KSCE J. Civil Eng., 19(7), 2061-2066 https://doi.org/10.1007/s12205-015-0163-0
  13. Wang, L.H., Bai, X.H. and Feng, J.Q. (2010), "Discussion on shearing strength influencing factors of compacted loess-like backfill", Chin. J. Geotech. Eng., 32(S2), 132-136.
  14. Zhang, F.Y., Wang, G.H., Kamai, T., Chen, W.W., Zhang, D.X. and Yang, J. (2013), "Undrained shear behavior of loess saturated with different concentrations of sodium chloride solution", Eng. Geol., 155(3), 69-79. https://doi.org/10.1016/j.enggeo.2012.12.018

피인용 문헌

  1. Effects of dry density and water content on compressibility and shear strength of loess vol.24, pp.5, 2018, https://doi.org/10.12989/gae.2021.24.5.419
  2. Hydromechanical behavior and prediction of unsaturated loess over a wide suction range vol.26, pp.3, 2021, https://doi.org/10.12989/gae.2021.26.3.275
  3. Long-term behavior of earth pressure around a high-filled cut-and-cover tunnel vol.26, pp.4, 2018, https://doi.org/10.12989/gae.2021.26.4.311