Method, member, and tendon for constructing an anchoring device

Abstract

An anchoring device not accessible from one of its sides can be produced by making a cavity ( 11 ) of a particular shape and using tendons ( 4 ), each of which has an end portion ( 41 ) of adapted shape. The cavity may be made in different ways, especially by concreting an anchor member ( 1 ) having an opening ( 12 ) at one end, the anchor member and the cavity it contains each having an adapted shape. After the anchor member has been concreted and the tendons inserted in the cavity, the cavity is filled with an embedding mortar in order to block the ends of the tendons therein.

What is claimed is:  
     
         1 . An anchoring device in a structure, the device having an opening accessible from a single side of the structure, comprising: 
 an anchoring member secured in the structure, the anchor member comprising a well member, bounding a cavity of a substantially oblong, tapering shape with two ends, the first end comprising the opening, a cross-sectional area of the first end being smaller than a cross-sectional area of another portion of the anchor member, and a bottom wall at the second end; and    a plurality of tendons, each said tendon comprising a traction rod having a first end and an intermediate portion with a first cross-sectional area and a second having an end portion with a second cross-sectional area larger than said first cross-sectional area, N such tendons inserted into the anchor member with the second ends in the cavity and the first ends and intermediate portions extending outwardly therefrom,    wherein the first and second cross-sectional areas of the traction rods and the cross-sectional area of the opening are related such that when N traction rods are in place, the N traction rods cannot be arranged at the opening to allow the second cross-sectional area of one additional traction rod to pass through the opening    
     
     
         2 . The anchoring device of  claim 1 , wherein the cavity has at least one cross-sectional area that is greater than the sum of the maximum cross-sectional areas of the N second ends.  
     
     
         3 . The anchoring device of  claim 1 , wherein the cross-sectional area of the opening of the cavity is less than the sum of the cross-sectional areas of the second ends of the N tendons inserted in said cavity.