Abstract: The ribbed column – ground anchor system has been widely used in the slope stability design and construction over the years. In the engineering practice, the focus on this system is at the lateral pressure in the ribbed column and the force in the ground anchors. In general, the approach method has the advantage of accurate in the stress prediction and clear in the principle. In spite of these advantages, engineering hazards such as excessive deformations and even failures in the system were also occurred and the significant economic loss was therefore induced. Throughout the evaluation, it is concluded that in the ribbed columnground anchor system, in addition to the lateral pressure in the ribbed column and the lockoff force, the magnitude of the selfweight of the ribbed column and the magnitude of the frictional force at the slope are also contribute in the stability of the slope. Both factors are directly affecting the stability of the ribbed column and therefore affecting the stability. Practical suggestions in the design and analysis of the friction force between ribbed column and the slope are also proposed in the paper.

Key words: ribbed column and ground anchor system, frictional force, analysis and application