Comparison of Interface Shear Strength of Soil Nails Measured by Both Direct Shear Box Tests and Pullout Tests
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Volume 131, Issue 9
Abstract
The shear stress–displacement behavior and ultimate shear strength at the interface between the cement–grout nail and surrounding soil are of practical importance in the design and safety assessment of a soil nail system. The most commonly adopted method to measure the interface shear strength of a soil nail is a pullout testing method. The current study attempts to investigate the interface shear behavior between the cement-grouted materials (soil nails) and a completely decomposed granite soil using both a large-size direct shear test apparatus and a laboratory pullout test apparatus. The laboratory testing procedures are briefly described. The main test results obtained are presented, followed by discussion on the shear behavior of the soil–grout interface. The interface shear behavior measured from both the interface shear tests and the pullout tests on the same soil tested in the same or a similar condition are compared and discussed. It is shown that the shear stress–displacement behavior of the soil–grout interface in the interface shear tests is similar to that of the soil–soil tests, but is different from the behavior in the pullout tests.
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Acknowledgment
Financial support from the Hong Kong Polytechnic University and the University Grants Committee (UGC) (Grant No. PolyU UNSPECIFIED5174/04E) of the Hong Kong SAR Government of China are gratefully acknowledged.
References
Bergado, D. T., Chai, J. C., and Balasubramanan, A. S. (1992). “Interaction between grid reinforcement and cohesive-frictional soil.” Proc., International Symp. on Earth Reinforcement Practice, Kyushu, Japan, Vol. 1, 29–34.
British Standards Institute. (1990). “Methods of test for soils for civil engineering purposes.” BS 1377: Part 2, London.
Chang, J. C., Hannon, J. B., and Forsyth, R. A. (1977). “Pull resistance and interaction of earth work reinforcement and soil.” Transportation Research Record, 640, Transportation Research Board, Washington, D.C.
Chen, P. Y. M. (1992). “Methods of test for soils in Hong Kong for civil engineering purposes (Phase 1 tests).” GEO Rep. No. 36, Geotechnical Engineering Office, Civil Engineering Dept., The Government of HKSAR, 33–35.
Chu, L. M. (2003). “Study on the interface shear strength of soil nailing in completely decomposed granite (CDG) soil.” Ms Philosophy thesis, The Hong Kong Polytechnic Univ., Hong Kong.
Franzen, G. (1998). “Soil nailing—A laboratory and field study of pullout capacity.” Doctoral thesis, Chalmers Univ. of Technology, Chalmers, Sweden.
Heymann, G. (1993). “Soil nailing systems as lateral support for surface excavations.” Master thesis, Faculty of Engineering, Univ. of Pretoria, Pretoria, South Africa.
Heymann, G., Rhode, A. W., Schwartz, K., and Friedlaender, E. (1992). “Soil nail pullout resistance in residual soils.” Proc., International Symp. on Earth Reinforcement Practice, Kyushu, Japan, Vol. 1, 487–492.
Ingold, T. S., and Templeman, J. E. (1979). “The comparative performance of polymer net reinforcement.” Proc., International Conf. on the Reinforcement of Soils, Paris, Vol. 1, 65–70.
Kulhawy, F. H., and Peterson, M. S. (1979). “Behavior of sand-concrete interfaces.” Proc., 6th Pan-Am Conf. on Soil Mechanics and Foundation Engineering, Vol. VII, 225–236.
Lee, C. F., Law, K. T., Tham, L. G., Yue, Z. Q., and Junaideen, S. M. (2001). “Design of a large soil box for studying soil-nail interaction in loose fill.” Soft soil engineering, Lee et al., eds., 413–418.
Milligan, G. W. E., and Tei, K. (1998). “The pull-out resistance of model soil nails.” Soils Found., 38(2), 179–190.
Murray, R. T., Carder, D. R., and Krawczyk, J. V. (1979). “Pull-out tests on reinforcements embedded in uniformly graded sand subjected to vibration.” Proc., 7th European Conf. on SMFE, Brighton, U.K., Vol. 3, 115–120.
Palmeira, E. M. (1987). “The study of soil reinforcement interaction by means of large scale laboratory tests.” PhD thesis, Univ. of Oxford, Oxford, U.K.
Palmeira, E. M., and Milligan, G. W. E. (1989). “Scale and other factors affecting the results of pull-out tests of grids buried in sand.” Geotechnique, 39(3), 511–524.
Powell, G. E., and Watkins, A. T. (1990). “Improvement of marginally stable existing slopes by soil nailing in Hong Kong.” Proc., International Reinforced Soil, Glasgow, Scotland, 241–247.
Pradhan, B. (2003). “Study of pullout behavior of soil nails in completely decomposed granite fill.” Master thesis, The Univ. of Hong Kong, Hong Kong.
Schlosser, F. (1990). “Mechanically stabilized earth retaining structures.” Design and performance of earth retaining structures, ASCE Geotechnical Special Publication, 347–378.
Schlosser, F., and Guilloux, A. (1981). “Le frottement dans les sols.” Rev. Francaise Geotechnique, 16, 65–77.
Smith, M. J. (1992). “The effects of variable geology on soil nail pull-out test results in Hong Kong.” Proc., International Symp. on Earth Reinforcement Practice, Kyushu, Japan, Vol. 1, 543–548.
Yim, K. P., Watkins, A. T., and Powell, G. E. (1988). “Insitu ground reinforcement for slope improvement in Hong Kong.” Proc., International Geotechnical Symp. on Theory and Practice of Earth Reinforcement, Fukuoka, Japan, 363–368.
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© 2005 ASCE.
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Received: Feb 19, 2004
Accepted: Feb 7, 2005
Published online: Sep 1, 2005
Published in print: Sep 2005
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