Project: Assessment of the Pullout Resistance of Soil Nails

Reference: CSU 28/4/64

Last update: 08/01/2010 14:35:40


To develop a procedure for measuring the pullout resistance of drilled and grouted soil nails on site, and
To establish a geotechnical model for the bond mechanism developed between a nail and surrounding soil, and thereby to develop a method for calculating the ultimate pullout resistance of soil nails.


To establish a method for determining the pullout resistance of soil nails. A methodology for undertaking pullout tests and interpreting the results will be developed and will be published in a report. The report will contain additional information and advice on site investigation practice and the measurement in situ of pore water pressure.


TRL Limited
Crowthorne House, Nine Mile Ride, Wokingham, Berkshire, RG40 3GA
+44 (0)1344 773131

Contract details

Cost to the Department: £22,705.00

Actual start date: 27 January 1999

Actual completion date: 13 November 2003


Assessment of Pullout Resistence of Soil Nails - Review Report
Author: G R A Watts (TRL)
Source: TRL Limited, Crowthorne, Berkshire