Theoretical model for calculating peak pullout resistance of soil nails under grouting pressure

Chengyu Hong, Jianhua Yin, Mengxi Zhang, Yifan Zhang, Liqiang Liu, Xiaofeng Wang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

Abstract

All right reserved. To investigate the correlation between peak pullout resistance of soil nails and some key parameters, and quantify the influences of grouting pressure, overburden stress and dilation angle of soils on the peak pullout resistance of soil nails, the correlation between cavity expansion theory and surrounding pressure on failure surface of soil nails was firstly proposed. Then, the relationship of the normal stress on the failure surface and peak pullout resistance of soil nails was derived according to Mohr-Column failure theory. In addition, the calculation method for peak pullout resistance was validated by laboratory test data and model data. Finally, a parametric study was carried out according to the proposed simple model to investigate the influence of different parameters on the peak pullout resistance of soil nails. This model was simple to be used in the design. Parametric study indicates that the grouting pressure, overburden stress and failure surface distance have interactive influence on the peak pullout resistance of soil nails, and their increasing rates under grouting pressure are much larger than that without grouting pressure.
Original languageChinese (Simplified)
Pages (from-to)204-209
Number of pages6
JournalDongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition)
Volume46
DOIs
Publication statusPublished - 1 Nov 2016

Keywords

  • Dilation angle
  • Grouting pressure
  • Overburden stress
  • Peak pullout resistance
  • Soil nails

ASJC Scopus subject areas

  • Engineering(all)

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