ABSTRACT
A pressure grouted anchor consists of a steel tendon placed in a small diameter bored hole, and grouted to the soil or rock by injecting a cement slurry under pressure. For a given soil, the factors influencing the capacity of such an anchor are the injection method, the number of times that the anchor has been injected, the volume of grout injected, the effective injection pressure, the flow rate of the injected slurry, and the quality of the grout. The first step in the design of an anchor is to determine the direction of the anchor and the load to be resisted by the anchor. This is obtained by evaluating the pressures acting on the structure and the spacing of the anchors. The second step is to determine the cross section of the tendon and the unbonded length. The third step consists of estimating the bonded length.
