초록 ▼

A precast, prestressed concrete secondary containment vault comprised of a sloped, watertight bottom unit capable of holding a primary tank\s entire contents, a collar unit sealed to the bottom unit by post-tensioned strands, top panels capable of supporting vehicles, a manhole providing access to p

A precast, prestressed concrete secondary containment vault comprised of a sloped, watertight bottom unit capable of holding a primary tank\s entire contents, a collar unit sealed to the bottom unit by post-tensioned strands, top panels capable of supporting vehicles, a manhole providing access to permit direct inspection of the primary tank, and means for monitoring, ventilating and pumping the vault. Double-wall pipes for connecting the primary tank to external units and for directing any pipe leakage to the bottom unit are disclosed. The disclosed vault permits the use of less expensive, single-wall tanks which may be repaired in the vault or replaced by removing the top panels.

대표청구항 ▼

A precast secondary containment vault for holding a large primary containment vessel, such as a gasoline storage tank, that may contain a hazardous fluid, said precast secondary containment vault being transportable over existing highways and allowing physical and visual inspection of said large pri

A precast secondary containment vault for holding a large primary containment vessel, such as a gasoline storage tank, that may contain a hazardous fluid, said precast secondary containment vault being transportable over existing highways and allowing physical and visual inspection of said large primary containment vessel by a normal size human, said precast secondary containment vault isolating said large primary containment vessel from vertical and lateral forces external, caused in part by external fluids, to said large primary containment vessel and isolating said large primary containment vessel from corrosive affects of soil, said precast secondary containment vault comprising: (a) a precast concrete bottom unit having a cavity therein for receiving said large primary containment vessel, said cavity being of sufficient size to hold all of said hazardous fluid if said large primary containment vessel was filled with said hazardous fluid and said large primary containment vessel leaked, said precast concrete bottom unit being (i) pretensioned and reinforced, and (ii) transportable over said highways; (b) means for making said precast concrete bottom unit impermeable to said hazardous fluid; (c) a precast concrete collar unit sized and shaped to fit on an upper portion of said precast concrete bottom unit, said precast concrete collar unit being (i) pretensioned and reinforced, and (ii) transportable over said highways; (d) a reservoir joint for mating a lower portion of said precast concrete collar unit with said upper portion of said precast concrete bottom unit to form a substantially watertight seal therebetween; (e) a precast concrete top unit removably secured to an upper rim of said precast concrete collar unit with sealing material therebetween, said precast concrete top unit (i) allowing insertion or removal of said large primary containment vessel when said precast concrete top unit is removed, (ii) being reinforced, and (iii) being transportable over said highways; (f) a manhole in said precast secondary containment vault allowing access therethrough by said human for said physical and visual inspection of said large primary containment vessel and possible repair without removing said large primary containment vessel from said precast secondary containment vault; (g) means for supporting said large primary containment vessel above said upper surface of said cavity of said precast concrete bottom unit a distance sufficient to allow said physical and visual inspection of a lower surface of said large primary containment vessel by said human; (h) means for access into said precast secondary containment vault to (1) a sump location point and/or (2) said large primary containment vessel, during normal usage said means for access allowing external connections therethrough to said large primary containment vessel while preventing said external fluids from entering said secondary containment vault; and (i) said precast concrete bottom unit, said precast concrete collar unit and said precast concrete top unit forming said precast secondary containment vault that is watertight during normal usage, but allowing access to said large primary containment vessel; said precast concrete bottom unit, said precast concrete collar unit and said precast concrete top unit being capable of withstanding said vertical and lateral forces and said corrosive affects of said soil when assembled.