Influence of Grouting Pressure and Overburden Stress on the Interface Resistance of a Soil Nail
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 135, Issue 9
Abstract
Grouted soil nails are widely used in slope stabilization. The influence of both grouting pressure and overburden stress on the soil-nail pullout interface shear resistance is still not well understood due to the complex of soil-grout interactions. A series of laboratory soil-nail pullout tests have been carried out on a completely decomposed granite soil in nearly saturated condition under a combination of different grouting pressures and overburden stresses. The pullout tests simulate the real construction process of a soil nail, including establishment of initial soil stresses in a soil slope, drilling a hole with stress release, grouting, and soil-nail pullout when the slope is sliding. The pullout box is well instrumented. Test data are collected automatically by a data logger. Typical test results are presented, explained, and discussed in this paper. The soil-nail interface shear resistance data from all tests are analyzed and interpreted. The study shows that the grouting pressure and overburden stress have interactional influence on the soil-nail pullout resistance. Based on the test results, a new empirical liner equation with two grouting pressure dependent parameters is proposed for calculation of soil-nail pullout resistance considering both grouting pressure and overburden stress. New understandings and findings from the study are presented.
Get full access to this article
View all available purchase options and get full access to this article.
Acknowledgments
The writers thank Mr. C. Y. Hong and Ms. L. Lai for their assistance in carrying out the laboratory soil-nail pullout tests in this paper. Financial support from The Hong Kong Polytechnic University and a grant from Research Grants Committee (Grant No. UNSPECIFIEDPolyU 5174/04E) of the Hong Kong Special Administrative Region Government of China are gratefully acknowledged.UNSPECIFIED
References
Berglund, C., and Oden, K. (1996). “The pullout resistance of different types of nails.” MS thesis, Dept. of Geotechnical Engineering, Chalmers Univ. of Technology, Göteborg, Sweden.
Chan, R. K. S. (2005). “Safe and green slope—The holistic Hong Kong approach.” Proc., Safe and Green Slopes—HKIE Geotech. Div. 25th Annual Seminar, HKIE-GDC, Hong Kong, 1–26.
Chang, K. T., and Milligan, G. W. E. (1996). “Effects of the transition zone in a nailed wall model test.” Proc., Earth Reinforcement, Ochiai, Yasufuku, and Omie, eds., Balkema, Rotterdam, The Netherlands, 333–338.
Junaideen, S. M., Tham, L. G., Law, K. T., Lee, C. F., and Yue, Z. Q. (2004). “Laboratory study of soil-nail interaction in loose, completely decomposed granite.” Can. Geotech. J., 41, 274–286.
Juran, I., and Elias, V. (1991). “Ground anchors and soil nails in retaining structures.” Foundation engineering handbook, 2nd Ed., H. -Y. Fang, ed., Chapman & Hall, New York, 868–905.
Kleyner, I., and Krizek, R. J. (1995). “Mathematical model for bore-injected cement grout installations.” J. Geotech. Engrg., 121(11), 782–788.
Ng, C. W. W., and Zhou, R. Z. B. (2005). “Effects of soil suction on dilatancy of an unsaturated soil.” Proc., 16th Int. Conf. on Soil Mech. and Geotech. Engineering, Osaka, Japan, 559–562.
Pun, W. K., and Shiu, Y. K. (2007). “Design practice and technical developments of soil nailing in Hong Kong.” Proc., HKIE Geotechnical Div. 27th Annual Seminar: Geotechnical Advancements in Hong Kong Since 1970s, Hong Kong, 197–212.
Schlosser, F. (1982). “Behaviour and design of soil nailing.” Proc., Recent Developments in Ground Improvement Techniques, Bangkok, Thailand, 399–413.
Schlosser, F., and Guilloux, A. (1981). “Le frottement dens les sols.” Revue Francaise de Geotechnique, 16, 65–77.
Su, L. J. (2006). “Laboratory pullout testing study on soil nails in compacted completely decomposed granite fill.” Ph.D. thesis, Hong Kong Polytechnic Univ., Hong Kong.
Su, L. J., Chan, T. C. F., Shiu, Y. K., Cheung, T., and Yin, J. H. (2007). “Influence of degree of saturation on soil nail pullout resistance in compacted completely decomposed granite fill.” Can. Geotech. J., 44(11), 1314–1428.
Su, L.-J., Chan, T. C. F., Yin, J.-H., Shiu, H. Y. K., and Chiu, S. L. (2008). “Influence of overburden pressure on soil nail pull-out resistance in a compacted fill.” J. Geotech. Geoenviron. Eng., 134(9), 1339–1347.
Yeung, A. T., et al. (2005). “An innovative Korean system of pressure-grouted soil nailing as a slope stabilization measure.” Proc., HKIE Geotechnical Div. 25th Annual Seminar, HKIE-GDC, Hong Kong, 43–49.
Yin, J. H., and Su, L. J. (2006). “An innovative laboratory box for testing nail pullout resistance in soil.” Geotech. Test. J., 29(6), 451–461.
Yin, J. H., Su, L. J., Cheung, R. W. M., Shiu, Y. K., and Tang, C. (2008). “The influence of grouting pressure on the pullout resistance of soil nail in compacted completely decomposed granite fill.” Geotechnique, 59(2), 103–113.
Information & Authors
Information
Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 135 • Issue 9 • September 2009
Pages: 1198 - 1208
Copyright
© 2009 ASCE.
History
Received: Feb 5, 2008
Accepted: Jan 16, 2009
Published online: Aug 14, 2009
Published in print: Sep 2009
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.