Abstract
The time effect behavior of soil anchors is very important in engineering design on slopes, retaining walls and tunnels. The pullout creep tests of two grouted anchors in silty clay were carried out. On basis of the creep testing data, the pullout creep curves and isochronal curves of pullout force-pullout displacement at the different time were obtained. The data of secant stiffness with time from the isochronal curves was obtained. The relational expression of pullout stiffness of grouted anchors with time was established by means of Hooke-Kelvin model. The formula of pullout stiffness of grouted anchor with time under a constant pullout force was derived. By the formula fitting the data of secant stiffness with time on two anchors, the parameters in Hooke-Kelvin model can be obtained. Based on the damage theory, the equations of the creep damage variant and the long-term pullout strength of anchor were derived. The results indicate that the long-term pullout capacity is about 85%–90% of the instantaneous limit pull strength.
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References
International Society for Rock Mechanics. Rock anchorage testing[J]. Int J Rock Mech Min Sci & Geomech Abstr, 1985, 22(1): 73–83.
BENMOKRANE B, CHENNOUF A, MITRI H S. Laboratory evaluation of cement-based grouts and grouted rock anchors[J]. Int J Rock Mech Min Sci & Geomech Abstr, 1995, 32(7): 633–642.
HE Si-ming. Mechanism of anchor in deep excavation[C]//SHEN Z J, LAW K T, LI G Y, et al. Proc of Second Int Conf on Soft Soil Engineering. Nanjing: Hohai University Press, 1996: 513–518.
XU Hong-fa, LU Hong-biao, Qian Qi-hu. Creep damage effects of pulling grouting anchor in soil[J]. Chinese Journal of Geotechnical Engineering, 2002, 24(1): 61–63. (in Chinese)
GURINSKY M A. Long-term strength of prestressed ground anchors in creep-sensitive soils[J]. ASEC Geotechnical Special Publication, 2002, 116(1): 37–52.
KIM N K. Performance of tension and compression anchors in weathered soil[J]. Journal of Geotechnical and Geoenvironmental Engineering, ASCE, 2003, 129(12): 1138–1150.
LI Hua-qiu, ZHANG Fu-ming, ZHAO Yu-xiang. In-site test of anchor bolt in mucky soil and its engineering application[J]. Chinese Journal of Rock Mechanics and Engineering, 2002, 19(Sup):1014–1017. (in Chinese)
FLUGGE W. Viscoelasticity[M]. Second Editon. New York: Springer-Verlag Berlin Heidelberg, 1975.
VOYIADJIS G Z, KATTAN P I. Advances in Damage Mechanics[M]. Amsterdam: Elsevier Science, 1999.
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Foundation item: Project(2001030155) supported by Postdoctoral Science Foundation, China
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Xu, Hf., Wang, Fj. & Cheng, Xx. Pullout creep properties of grouted soil anchors. J Cent. South Univ. Technol. 14 (Suppl 1), 474–477 (2007). https://doi.org/10.1007/s11771-007-0310-y
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DOI: https://doi.org/10.1007/s11771-007-0310-y