Advertisement

In Situ Test of Traffic-Load-Induced Settlement of Alluvial Silt Subsoil Treated by Unslaked Lime

  • Qing Jin
  • Xinzhuang Cui
  • Junwei Su
  • Tu Lu
  • Lei Zhang
  • Zhongxiao Wang
Conference paper
Part of the Sustainable Civil Infrastructures book series (SUCI)

Abstract

The soft wet alluvial silt is widely distributed material in the world. In order to improve the bearing capacity and decrease the traffic-load-induced settlement of silt subsoil, the shallow subsoil always treats with the unslaked lime. However, the mitigating effect of this ground treatment method on traffic-load-induced settlement of alluvial silt subsoil is inconclusive. Therefore, with the developed falling weight simulation equipment of traffic load, in situ tests are carried out on the natural and unslaked lime treated alluvial silt ground in the Yellow River delta of China to study traffic-load-induced settlement. Furthermore, Chai-Miur cumulative deformation model of soil is employed to numerically simulate the long-term traffic-load-induced cumulative settlement. In situ test results indicate that because unslaked lime treatment enhances wave impedance of the reinforced soil layer, the wheel-load-induced dynamic stress and excess pore water pressure in the substratum decreases. The decrease of excess pore water pressure reduces the cumulative settlement of unslaked lime treated subsoil. For short-term cumulative settlement, there are differences between tested and calculated results, but not much. The calculated results imply that after opening to traffic for 10 years, compared with the natural ground, the cumulative settlement of the unslaked lime treated subsoil reduces by about 21%, and the change of transverse slope of pavement induced by cumulative settlement decreases by 1/3. In situ test and numerical calculation results demonstrate that shallow layer treatment with unslaked lime can effectively mitigate the cumulative settlement of alluvial silt subsoil.

Notes

Acknowledgements

This work was supported by the Chinese Natural Science Foundations (Nos. 51279094, 51078222 and 50708056), the Natural Science Foundations of Shandong Province, China (No. ZR2011EEM012) and the Independent Innovation Foundation of Shandong University (IIFSDU) (No. 2012HW003).

References

  1. Abdelkrim, M., Bonnet, G., Buhan, P.D.: A computational procedure for predicting the long term residual settlement of a platform induced by repeated traffic loading. Comput. Geotech. 30(6), 463–476 (2003)CrossRefGoogle Scholar
  2. Akira, S., Lawalenna, S., Norihiko, M.: Partially-drained cyclic behavior and its application to the settlement of a low embankment road on silty-clay. Jpn. Geotech. Soc. 43(1), 33–46 (2003)Google Scholar
  3. Chai, J.C., Miura, N.: Traffic-load-induced permanent deformation of road on soft subsoil. J. Geotech. Geoenviron. Eng. 128(11), 907–916 (2002)CrossRefGoogle Scholar
  4. Cui, X.Z.: Traffic-induced settlement of subgrade of low liquid limit silt in Yellow River delta. China Civil Eng. J. 45(1), 154–162 (2012). (in Chinese)Google Scholar
  5. Fujiwara, H., Ue, S., Yasuhara, K.: Consolidation of alluvial clay under repeated loading. Soils Found. 25(3), 19–30 (1985)CrossRefGoogle Scholar
  6. Fujiwara, H., Ue, S.: Effect of preloading on post-construction consolidation settlement of soft clay subjected to repeated loading. Soils Found. 30(1), 76–86 (1990)CrossRefGoogle Scholar
  7. Huang, Y.H.: Pavement Analysis and Design. Pearson Education, Delhi (1993)Google Scholar
  8. Indraratna, B., Rujikiatkamjorn, C., Ewers, B.: Class A prediction of the behavior of soft estuarine soil foundation stabilized by short vertical drains beneath a rail track. J. Geotech. Geoenviron. Eng. 136(5), 686–696 (2010)CrossRefGoogle Scholar
  9. Kamon, M.: Recent developments of soil improvement. In: Proceedings of International Symposium on Soil Improvement and Pile Foundation, Nanjing, China, vol. I, pp. 1–16 (1992)Google Scholar
  10. Li, D., Selig, E.T.: Cumulative plastic deformation for fine-grained subgrade soils. J. Geotech. Eng. 122(12), 1006–1013 (1996)CrossRefGoogle Scholar
  11. Liu, J.K., Xiao, J.H.: Experimental study on the stability of railroad silt subgrade with increasing train speed. J. Geotech. Geoenviron. Eng. 136(6), 833–841 (2010)CrossRefGoogle Scholar
  12. Monismith, C.L., Ogawa, N., Freeme, C.R.: Cumulative deformation characteristics of subsoil due to repeated loading. Transp. Res. Rec. 537, 1–17 (1975)Google Scholar
  13. Narasimha, R.S., Rajasekaran, G.: Reaction products formed in lime-stabilized marine clays. J. Geotech. Eng. 122, 329–336 (1996)CrossRefGoogle Scholar
  14. Seed, H.B., Chan, C.K., Monismith, C.L.: Effects of repeated loading on the strength and deformation of compacted clay. Highw. Res. Board Proc. 34, 541–558 (1955)Google Scholar
  15. Seed, H.B., McNeill, R.L.: Soil deformation in normal compression and repeated loading test. Highw. Res. Board Bull. 141, 44–53 (1956)Google Scholar
  16. Shahu, J.T., Yudhbir, Hayashi S.: Cumulative plastic strain and threshold stress of a Quasi-saturated compacted silty clay. Lowland Technol. Int. 10(2), 10–20 (2008)Google Scholar
  17. Shen, Z.J.: Earth pressure of clay based on effective consolidation stress theory. Chinese J. Geotech. Eng. 22(3), 353–356 (2000). (in Chinese)Google Scholar
  18. Wang, X.: Test on dynamic stress of roadbed and pavement under heavy loads. J. Vib. Shock 26(2), 169–173 (2007). (in Chinese)Google Scholar
  19. Yildirim, H., Erşan, H.: Settlements under consecutive series of cyclic loading. Soil Dyn. Earthq. Eng. 27, 577–585 (2007)CrossRefGoogle Scholar

Copyright information

© Springer International Publishing AG, part of Springer Nature 2019

Authors and Affiliations

  • Qing Jin
    • 1
  • Xinzhuang Cui
    • 1
  • Junwei Su
    • 1
  • Tu Lu
    • 1
  • Lei Zhang
    • 1
  • Zhongxiao Wang
    • 1
  1. 1.School of Civil EngineeringShandong UniversityJinanChina

Personalised recommendations