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pullout of soil nail with circular discs: A three-dimensional finite element analysis

Journal of Rock Mechanics and Geotechnical Engineering 2017年第5期9卷 967-980页

作者： Saurabh Rawat Ashok Kumar Gupta Anil Kumar Department of Civil Engineering Jaypee University of Information Technology Waknaghat Solan 173234 Himachal Pradesh India

An internal failure mode for a soil-nailed system consists of failure at nail heads,slope facing,nail strength,along groutesoil interface and pullout failure.A better understanding of pullout of soil nail thus becomes important to assess the stability of a soil-nailed *** the present study,an investigation into the pullout behaviour of soil nail with circular discs along the shaft has been carried out by a threedimensional finite element analysis using Abaqus/Explicit routine.A total of 67 simulations have been performed to accurately predict the pullout behaviour of soil *** soil nail under study has circular discs along its shaft varying in numbers from 1 to *** pullout of this soil nail in a pullout test box has been simulated with a constant overburden pressure of 20 kPa acting on the *** pullout load edisplacement characteristics,stresses around soil nail and failure mechanism during pullout are *** of dimensionless factors such as normalised pullout load factor and bearing capacity factor have been obtained with different combinations of parameters in terms of relative disc spacing ratio,anchorage length ratio,embedment ratio,diameter ratio and displacement *** the results of analyses,it is found that nail with more circular discs requires higher pullout *** are critical relative disc spacing ratio and diameter ratio which significantly affect the pullout behaviour of nail.

关键词： pullout behaviour Finite element analysis Soil nail Circular discs Dimensionless factors

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