Adjustable mold for producing precast concrete top panels having varying geometries for use in mechanically stabilized earth (MSE) retaining wall

A mold for forming a precast concrete top panel for a modular earth retaining wall, the top panel having a plurality of sides, the mold comprising:

• a support base with a top surface, bottom surface, and surrounding periphery, the top surface designed to form a side of the precast concrete top panel;
• a plurality of rails that upstand perpendicular from the support base, the rails attached to form a closed lateral boundary with an open top to receive liquified concrete, the rails designed to form lateral sides of the precast concrete top panel;
• wherein the plurality of rails can be adjusted to change a geometric shape associated with the closed lateral boundary in order to enable production of different top panels having different lateral boundaries;
• and
• wherein the plurality of rails further comprises:
• an elongated, panel bottom forming rail with an elongated body extending between opposing ends, the rail extending upwardly in a perpendicular manner from the top surface of the panel back forming support base, the elongated body having a bottom concrete contact surface designed to form a bottom side of the top panel;
• an elongated, panel left side forming rail with an elongated body extending between opposing ends, the rail extending upwardly in a perpendicular manner from the top surface of the panel back forming, support base, the left side forming rail being extendable and retractable between the first and second ends, the elongated body having a left side concrete contact surface designed to form a left side of the top panel;
• an elongated, panel right side forming rail with an elongated body extending between opposing ends, the rail extending upwardly in a perpendicular manner from the top surface of the panel back forming support base, the right side forming rail being extendable and retractable between the opposing ends, the elongated body having a right side concrete contact surface designed to form a right side of the top panel, the right and left side concrete contact surfaces being generally parallel;
• and
• an elongated, panel top side forming rail with an elongated body extending between opposing ends, the rail extending upwardly in a perpendicular manner from the top surface of the panel back forming support base, the top side forming rail being extendable and retractable between the opposing ends, the elongated body having a top side concrete contact surface designed to form a top side of the top panel, the panel top side forming rail being adjustably attached to the panel left side forming rail so that a first angle between the left side and top side concrete contact surfaces can be changed, the panel top side forming rail being adjustably attached to the panel right side forming rail so that a second angle between the right side and the top side concrete contact surfaces can be changed.