vertical rebars 36 1 42 within each column 38 to provide for appropriate x axis offset between opposing ends of panels 18 and 20 each column 38 will typically exhibit a z axis dimension having a ratio of about 5 to 1 relative to the x axis dimension of each panel 18 20 thereby allowing a void space in a range of about 45 to about 50 inches about 125 cm between each panel 18 and 20 see fig1 7 and 8 between concrete panels 18 and 20 is provided a volume of high shock absorbent material such as loose sand dirt gravel pebbles special purpose blast suppressing foam barriers as is taught in u s pat no 4 589 341 to clark and special shock attenuating cellular elements of the type taught in u s pat no 4 763 457 to caspe et al with reference to fig7 there is shown a foundation plan of the inventive system therefrom it may be appreciated that a typical unit of the present blast protective barrier system will consist of pile caps 10 10 1 10 2 and 10 3 and their above described corresponding piles 24 and vertical panels 18 and 20 see also fig8 expansion joint columns 38 are used for the joinder of opposing xz surfaces 40 see fig5 of panels 18 20 rather special columns 38 include spaces 48 for expansion as shown in fig9 said spaces assume the modularity of each panel pairs 18 20 said columns 38 may be furnished with various properties of blast isolation as set.