Swimming pool construction

Claim 1

A GROUND-EXCAVATED SWIMMING POOL COMPRISING, A PLURALITY OF LATERALLY CONNECTED VERTICALLY-DISPOSED, SUBSTANTIALLY RIGID WALL PANELS, DEFINING THE HORIZONTAL CONTOUR OF THE POOL, AND A PLURALITY OF HORIZONTALLY-DISPOSED PANEL-POSITIONING TRUSS-STRUCTURES CONNECTED END TO END AND EXTENDING COEXTENSIVELY ALONG THE UPPER MARGINS OF SAID PANELS FOR FIXED INTEGRATION WITH A PERIMETRICAL CONCRETE COLLAR FOR SAID POOL, SAID COLLAR BEING FREE OF DIRECT CONNECTION TO SAID PANELS, EACH OF THE TRUSS STRUCTURES HAVING AN INTEGRALLY CONNECTED CHANNEL-SHAPED BRACKET OPENING DOWNWARDLY SUBSTANTIALLY NORMAL TO THE PLANE OF THE TRUSS-STRUCTURES AND EXTENDING CONTINUOUSLY ALONG THE INNER EDGE THEREOF, THE UPPER ENDS OF SAID PANELS EXTENDING INTO THE CHANNEL OF SAID BRACKETS FOR VERTICALLY SLIDABLE INTERFITTING CONNECTION WITH THE TRUSS-STRUCTURES TO PERMIT RELATIVE VERTICAL SHIFTING OF THE PANELS AND THE TRUSS-STRUCTURES TO COMPENSATE FOR FROST ACTIVATED GROUND SWELLS AROUND THE PERIMETER OF THE POOL.