Precast Concrete Panels Used as Surface Lining of Perimeter Surfaces of Excavations

A lined barrier system for supporting and lining a perimeter surface of an excavation;

• said system comprising in combination a plurality of support columns and a flexible seal system;
• the perimeter surface supported by and defined by a solid structure in the form of the support columns;
• the perimeter surface lined by means of precast concrete panels which are affixed to the support columns;
• gaps between adjacent concrete panels sealed by the flexible seal system;
• the flexible seal system including a flexible seal member of a first type and a flexible seal member of a second type in which an overlap component of the flexible seal member of the first type overlaps a portion of a surface component of the flexible seal member of the second type to form an elongated weld zone along edges of juxtaposed concrete panels;
• the overlap component welded to the portion of the surface component to form a substantially watertight flexible seal between the concrete panels and thereby to form a sealed lining in combination with the support columns.

A sealed barrier method for creating a substantially watertight lined barrier for a perimeter surface of an excavation;

• the perimeter surface supported by and defined by a solid structure in the form of support columns in combination with precast concrete panels of a flexible sealing system;
• the perimeter surface lined by means of precast concrete panels which are affixed to the support columns;
• gaps between adjacent precast concrete panels sealed by the flexible seal system;
• the flexible seal system including a flexible seal member of a first type and a flexible seal member of a second type in which an overlap component of the flexible seal member of the first type overlaps a portion of a surface component of the flexible seal member of the second type to form an elongated weld zone along edges of juxtaposed concrete panels;
• the overlap component welded to the portion of the surface component to form a substantially watertight flexible seal between the precast concrete panels and thereby to form a sealed lining in combination with the support columns.