Plastic lined concrete tanks equipped with waterstop systems

A plastic lined concrete tank comprising a floor, a horizontally elongated upright wall having a lower edge disposed adjacent said floor, a plastic wall lining disposed on an interior surface of the wall, and a horizontally elongated plastic waterstop structure inhibiting penetration of water between said floor and said lower edge of the wall, said waterstop structure comprising:

• an anchor attached to said floor adjacent said wall;
• an upwardly extending flange including an upper attachment segment, said upper attachment segment of the flange and a lower attachment portion of the lining being disposed in overlapping relationship relative to one another, said upper attachment segment having an upper edge attached in sealing relationship to said wall lining so as to present an elongated sealed joint comprising a horizontally elongated plastic weld bead which extends along said upper edge in a lateral direction across the wall lining;
• and
• an area of a surface of said upper attachment segment and a facing area of a surface of said lower attachment portion being interconnected to form a supporting structure at a position lower on the wall than the sealed joint, whereby outward bending of the flange away from the wall lining at said joint during shifting of the wall relative to the floor is inhibited and outward bending of the flange away from the wall lining at a location remote from said joint during shifting of the wall relative to the floor is promoted.

A plastic lined concrete tank comprising a generally horizontal floor, a horizontally elongated upright wall having a lower edge disposed adjacent said floor, said wall being relatively shiftable in a generally horizontal direction relative to said floor, a plastic wall lining disposed on an interior surface of the wall, a plastic floor liner disposed on an upper surface of the floor, and a horizontally elongated plastic waterstop structure disposed to extend upwardly between the floor and said wall lining for inhibiting penetration of water between said floor and said lower edge of the wall, said waterstop structure being resistant to damage during shifting of the wall relative to the floor and comprising:

• an anchor attached to said floor adjacent said wall;
• a flange extending upwardly from the anchor, said flange including an upper attachment segment attached in sealing relationship to a lower attachment portion of the wall lining;
• and
• a floor liner attachment member connected to said anchor, said attachment member including a generally horizontally extending tab section having a distal edge portion attached in sealing relationship to a lateral attachment portion of the floor liner.

A plastic lined concrete tank comprising a generally horizontal floor, a horizontally elongated upright wall having a lower edge disposed adjacent said floor, a plastic wall lining disposed on an interior surface of the wall, a plastic floor liner disposed on an upper surface of the floor, and a horizontally elongated plastic waterstop structure inhibiting penetration of water between said floor and said lower edge of the wall, said waterstop structure comprising:

• an anchor attached to said floor adjacent said wall;
• an upwardly extending flange including an upper attachment segment attached in sealing relationship to a lower attachment portion of the wall lining;
• and
• a floor liner attachment member connected to said anchor, said attachment member including a generally horizontally extending tab section having a distal edge portion attached in sealing relationship to a lateral attachment portion of the floor liner, said attachment member including a connector flap that is attached to said anchor.

A plastic lined concrete tank comprising a floor, a horizontally elongated upright wall having a lower edge disposed adjacent said floor, a plastic wall lining disposed on an interior surface of the wall, and a horizontally elongated plastic waterstop structure inhibiting penetration of water between said floor and said lower edge of the wall, said waterstop structure comprising:

• an anchor attached to said floor adjacent said wall;
• an upwardly extending flange including an upper attachment segment, said upper attachment segment of the flange and a lower attachment portion of the lining being disposed in overlapping relationship relative to one another, said upper attachment segment having an upper edge attached in sealing relationship to said wall lining so as to present an elongated sealed joint which extends along said upper edge in a lateral direction across the wall lining,
• an area of a surface of said upper attachment segment and a facing area of a surface of said lower attachment portion being interconnected to form a supporting structure at a position lower on the wall than the sealed joint, whereby outward bending of the flange away from the wall lining at said joint during shifting of the wall relative to the floor is inhibited and outward bending of the flange away from the wall lining at a location remote from said joint during shifting of the wall relative to the floor is promoted;
• and
• a plastic floor liner on an upper surface of the floor and a floor liner attachment member connected to said anchor, said attachment member including a generally horizontally extending tab section having a distal edge portion attached in sealing relationship to a lateral attachment portion of the floor liner,
• wherein said attachment member includes a connector flap that is attached to said anchor.

A method for sealing a plastic lined concrete tank comprising a generally horizontal floor, a horizontally elongated upright wall, said wall being relatively shiftable in a generally horizontal direction relative to said floor, and a plastic wall lining disposed on an interior surface of the wall, said method comprising:

• providing an elongated plastic waterstop structure including an anchor and a flange;
• positioning the waterstop structure so that it extends upwardly between the floor and said wall lining with the flange extending upwardly from the anchor, said flange having an upper attachment segment presenting an upper edge;
• attaching said anchor to said floor adjacent said wall;
• installing the upper attachment segment of the flange such that it and a lower attachment portion of the lining are disposed in overlapping relationship;
• sealing the upper edge of the upper attachment segment to said wall lining so as to present an elongated sealed joint which extends along said upper edge in a lateral direction across the wall lining;
• and
• interconnecting an area of a surface of said upper attachment segment and a facing area of a surface of said lower attachment portion to form a supporting structure at a position lower on the wall than the sealed joint, whereby outward bending of the flange away from the wall lining at said joint during shifting of the wall relative to the floor is inhibited and outward bending of the flange away from the wall lining at a location remote from said joint during shifting of the wall relative to the floor is promoted.

A method for sealing a plastic lined concrete tank comprising a generally horizontal floor, a horizontally elongated upright wall, and a plastic wall lining disposed on an interior surface of the wall, said method comprising:

• providing a waterstop structure including an anchor and an upwardly extending flange having an upper attachment segment presenting an upper edge;
• attaching said anchor to said floor adjacent said wall;
• installing the upper attachment segment of the flange such that it and a lower attachment portion of the lining are disposed in overlapping relationship;
• sealing the upper edge of the upper attachment segment to said wall lining so as to present an elongated sealed joint which extends along said upper edge in a lateral direction across the wall lining;
• and
• interconnecting an area of a surface of said upper attachment segment and a facing area of a surface of said lower attachment portion to form a supporting structure at a position lower on the wall than the sealed joint, whereby outward bending of the flange away from the wall lining at said joint during shifting of the wall relative to the floor is inhibited and outward bending of the flange away from the wall lining at a location remote from said joint during shifting of the wall relative to the floor is promoted,
• wherein said supporting structure is formed by fusing together the plastic materials of the flange and the plastic materials of the lining.

A method for preventing bending along a horizontal sealed joint between (1) a plastic lining on an upright wall of a concrete tank, which wall sits by and shifts generally horizontally relative to a floor during use and (2) an upright flange of an elongated plastic waterstop, said method comprising:

• providing a lower attachment portion on said plastic lining beneath said joint;
• positioning said waterstop between said floor and said plastic lining so that said flange extends upwardly into overlapping relationship relative to said lower attachment portion;
• and
• interconnecting an area of said attachment portion to an area of an upper attachment segment of said flange to form a supporting structure at a position lower than said joint, whereby said flange bends at a location adjacent a lower edge of said supporting structure rather than at said joint during shifting of the wall.

A method for preventing bending along a horizontal sealed joint between a plastic lining on a wall of a tank which shifts during use and an upright flange of a plastic waterstop comprising:

• providing a lower attachment portion on said plastic lining beneath said joint;
• and
• interconnecting an area of said attachment portion to an area of an upper attachment segment of said flange bends at a location adjacent a lower edge of said supporting structure rather than at said joint during shifting of the wall,
• wherein said supporting structure is formed by fusing together the plastic materials of the flange and the plastic materials of the lining.