Method of making a liquid impervious wall

Claim 1

A METHOD OF CONSTRUCTING AN ARCUATE SEGMENT OF A LIQUID-IMPERVIOUS AND CYLINDRICAL TANK WALL, WHICH CONSISTS IN PROVIDING A SKELETON FRAME HAVING AN ARCUATE PORTION DISPOSED INWARDLY OF AND ADJACENT TO A SEGMENT OF THE PROPOSED CYLINDRICAL WALL, FORMING A DIAPHRAGM OVER THE CONVEX FACE OF SAID PORTION EMBODYING METAL SHEETS OVERLAPPING AT THEIR MARGINS, DETACHABLY SUPPORTING SAID SHEETS ON THE FRAME BY NON-PENETRATING SUPPORTING CONTACT OF THE FRAME WITH THE SHEETS AT THEIR INNER FACES, SEALING THE OVERLAPPED MARGINS OF THE SHEETS AGAINST THE PASSAGE OF LIQUIDS, FORMING A MONOLITHIC WALL ON AND OVER THE OUTER FACE OF THE DIAPHRAGM BY PLACING A CONTINUOUS LAYER OF CEMENTITIOUS COMPOSITION THEREONTO, AND RELEASING THE SUPPORTING ENGAGEMENT OF THE FRAME TO THE SHEETS AND MOVING THE FRAME FROM THE COMBINED DIAPHRAGM AND MONOLITHIC WALL TO THE NEXT ADJACENT SEGMENT OF THE PROPOSED WALL SOON AFTER THE WALL HAS SET SUFFICIENTLY TO BE SELF-SUPPORTING.