1996 Volume 49 Issue 3 Pages 3-10
One of popular technique of preventing the slopes from collapsing is the use of anchor work. This paper discusses the determinative methods of the design anchor force and anchor body position. Generally, the design of anchor works are made use of the limit equilibrium method. On the occasion of the anchor works design using this method, it is necessary to estimating the location and shape of the slip surface. In this case, the slip surface is often adopted one of the minimum safety factor (the critical slip surface) which is determined under the condition of the slope not acted anchor force. However, the critical slip surface of the slope acted anchor force is different from one not acted anchor force, because the internal stresses of ground change owing to the anchor force. Therefore, the design of anchor force and anchor body position have to be determined under the condition of the slope acted anchor force.
In this paper, the author shows the analytical methods and clarifies the above thought through analysing the model slopes using this analytical methods (slope stability and critical slip surface analysis) to which are applied the Spencer and the dynamic programming methods.
