Influences of overburden pressure and soil dilation on soil nail pull-out resistance

Li Jun Su, Jianhua Yin, Wan Huan Zhou

Research output: Journal article publicationJournal articleAcademic researchpeer-review

61 Citations (Scopus)

Abstract

Soil nailing is the most popular technique for stabilizing newly formed and existing sub-standard slopes in Hong Kong because of its economic and technical advantages. The nail-soil interface shear resistance is an important parameter in design of soil nailed structures. A three-dimensional finite element model was established and used for simulating soil nail pull-out tests. The finite element model was verified by comparing simulated results with measured data. The agreement between the experimental and simulated results in terms of both average pull-out shear stress and stress variation was very good. Using this finite element model, a parametric study was carried out to study the influences of the overburden pressure and soil dilation angle on the soil nail pull-out resistance. The simulated peak pull-out resistance was not directly related to the overburden pressure, which was coincident with the observations in laboratory pull-out tests. The simulated pull-out resistance increased significantly with the increase in dilation angle of the shearing zone. This analysis indicated that the constrained dilatancy of the nail-soil interface and the soil surrounding the nail contributed a lot to the development of peak pull-out resistance.
Original languageEnglish
Pages (from-to)555-564
Number of pages10
JournalComputers and Geotechnics
Volume37
Issue number4
DOIs
Publication statusPublished - 1 Jun 2010

Keywords

  • Dilation
  • Finite element
  • Overburden pressure
  • Parametric study
  • Pull-out resistance
  • Soil nailing

ASJC Scopus subject areas

  • Computer Science Applications
  • Geotechnical Engineering and Engineering Geology

Cite this