Method of constructing retaining wall

Claim 1

IN THE METHOD OF CONSTRUCTING A RETAINING WALL ABOVE GROUND ALONG THE BERM LINE OF A BODY OF WATER, THE STEPS COMPRISING: ARRANGING A FIRST CORRUGATED SHEET OF LIGHT WEIGHT AND RIGID, MINERAL FIBER-CEMENT MATERIAL ON EDGE ALONG SAID BERM LINE WITH THE CORRUGATIONS EXTENDING UPWARDLY; SINKING SAID FIRST SHEET INTO SAID GROUND BY APPLYING FLUID PRESSURE TO PART THE EARTH ALONG SAID BERM LINE, UNITL THE CORRUGATIONS OF SAID SHEET EXTEND DOWNWARDLY A SUBSTANTIAL DISTANCE BELOW THE SURFACE OF SAID GROUND AS WELL AS A SUBSTANTIAL DISTANCE ABOVE THE SURFACE; ARRANGING AND SINKING A SECOND SHEEET OF SAID MATERIAL IN THE SAME MANNER AND TO THE SAME LEVEL AS SAID FIRST SHEET; BUT WITH A CORRUGATION OVERLAPPING A CORRUGATION OF SAID FIRST SHEET; AS SAID SECOND SHEET IS SUNK TO SAID LEVEL, LOCKING SAID SHEETS TOGETHER ADJACENT THEIR UPPER ENDS BY ATTACHING UNITARY WIRE FASTENING MEANS EXTENDING OVER THE TOP EDGES AND ALONG THE OPPOSITE SIDES OF SAID OVERLAPPING CORRUGATIONS, IN ORDER TO PREVENT SAID SECOND SHEET FROM SINKING FURTHER INTO THE GROUND THAN SAID FIRST SHEET; AND AFTER SAID LOCKING STEP, FORMING AN INCLINED EMBANKMENT OF STABILIZED SOIL OF TRIANGULAR CROSS SECTION AND BOUNDED BY SAID BERM LINE, AT LEAST ABOUT ONE-HALF THE HEIGHT OF THE EXPOSED INLAND SIDES OF SAID SHEETS AND SAID SURFACE LEADING INLAND FROM SAID BERM LINE, IN ORDER TO REDUCE THE HORIZONTAL THRUST EXERTED ON SAID SHEETS BY THE LATER APPLIED BACKFILL, SAID STABILIZED SOIL BEING A MIXTURE OF FROM 3 TO 12% SELF-SETTING CEMENTITIOUS MATERIAL AND FROM 97 TO 88% SOIL.