Study of base friction simulation tests based on a complicated engineered bridge slope

Abstract

In this paper, a physical base friction test model of a slope is established. The model is based on similarity principles and the geological conditions of a complicated bridge slope during construction, deformation and failure. The behavior of the slope in both its natural state and during excavation loading is qualitatively analyzed through base friction tests. The base friction test results are then subjected to comparison and analysis using finite element numerical simulation. The findings show that the whole engineered slope tends to stabilize in its natural state, whereas instabilities will arise at faulted rock masses located near bridge piers during excavation loading. Therefore, to ensure normal construction operation of bridge works, it is suggested that pre-reinforcement of faulted rock masses be performed.

Keywords

base friction test / slope stability evaluation / bridge slope

References

[1] Goricki A, Goodman R E. Failure Modes of Rock Slopes Demonstrated with Base Friction and Simple Numerical Models. Rock Slope. 2003:25–30.

[2] Erguvanli K, Goodman R E. Applications of models to engineering geology for rock excavations. Bulletin of the Association of Engineering Geologists, 1972, 9: 89–104

[3] Egger P. A new development in the base friction technique. Proc. Symp. on Physical Geomechanical Models.1979:67–81.

[4] Xu Q, Zhang D X, Zheng G. Failure mode an stability analysis of left bank abutment high slope at JINGPING I hydropower station. Chinese Journal of Rock Mechanics and Engineering., 2009, 28(6): 1183–1192 (in Chinese)

[5] Feng W K, Shi Y C, Chai H J. Study of mechanism of deformation failure of a low-angle bedded high slope with physical simulation method. China Journal of Highway and Transport., 2001, 17(2): 32–36 (in Chinese)

[6] Chen X B, Li Y S, Zhao X P. The application of bottom friction gravity test to the study of the stability of the toppling rock mass. Earth Science Frontiers, 2008, 15(2): 300–304 (in Chinese)

[7] Toupin R A. Saint-Venant's Principle. Archive for Rational Mechanics and Analysis, 1965, 18(2): 83–96

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Higher Education Press and Springer-Verlag Berlin Heidelberg