below the intended depth of the foundation to be constructed inside the circular pattern of perimeter pile anchors this extension of the pile anchors is not necessary however as the pile hole depth may be substantially the same as the foundation depth 101 after the pile anchors have been formed an annular steel plate 43 formed as a ring having holes therein is placed over the piles the centralized pile bolts 36 extend through the holes and are secured with nuts 48 to retain bolt tension alternatively the ring may be formed by a plurality of individual steel plates 45 one for each pile with adjoining steel plates that either overlap as in fig4 6 7 and 9 or are spaced from one another as in fig8 having individual steel plates provides for greater flexibility with respect to the adjoining relationship of the piles and the centralized pile bolts the pile anchor base plate whether formed as a ring 43 or as independent plates 45 is preferably grouted into the top surface of the pile anchors 14 forming the perimeter wall 11 of the foundation 10 this can be readily accomplished by blocking out an indentation slightly larger than the dimensions of the base plate such as by using a styrofoam or other easily removable form the use of block outs is fully discussed in the 39 217 patent previously incorporated by reference the pile anchor base plate s should be grouted into the top surface of the pile anchors so that the upper surface of the base plate coincides with the upper surface of the foundation 10 according to both configurations of the first embodiment after the soils inside the perimeter wall 11 formed by the piles.