US 5,551,797 A · Underground drainage sump system and method of retrofitting for protecting a floor slab

Abstract

A method of retrofitting an underground water drainage sump system to below a floor slab for protecting the floor slab includes the steps of forming a sump hole below a floor slab of a building, drilling into and removing soil from below the floor slab so as to form a plurality of lateral passageways extending from a central location relative to an outer perimeter of the floor slab, extending the lateral passageways outwardly at two different levels and lengths and alternating therebetween to and beyond a footer at the outer perimeter of the floor slab, inserting a plurality of perforated collection pipes into the lateral passageways, placing a perforated drum into the sump hole such that inner ends of the perforated collection pipes are adjacent to the perforated drum, filling the sump hole around at least the lower portion of the perforated drum with drainage stones, placing a sump pump into the perforated drum, connecting the sump pump to a discharge pipe for transporting the drainage water from the perforated drum into a sewer system of the building or otherwise to the outside of the building away from the floor slab, and providing a cover for removably covering the sump hole.

Claims40

Dependent claims

A method of retrofitting an underground water drainage sump system to below a floor slab for protecting the floor slab, said retrofitting method comprising the steps of:

(a) forming a sump hole to extend through a floor slab and into underground below the floor slab;
(b) forming a plurality of lateral passageways in the underground below the floor slab so as to extend outwardly from said sump hole along and below the floor slab to the vicinity of an outer perimeter of the floor slab;
(c) inserting a plurality of perforated hollow collection pipes into the lateral passageways such that outer ends of said collection pipes extend to the vicinity of the outer perimeter of the floor slab and inner ends of said collection pipes are disposed in flow communication with said sump hole;
and
(d) placing a sump pump into said sump hole for pumping from said sump hole drainage water discharged into said sump hole from said collection pipes.

2 more elements

A method of retrofitting an underground water drainage sump system to below a floor slab for protecting the floor slab, said retrofitting method comprising the steps of:

(a) forming a sump hole to extend through a floor slab and into underground below the floor slab;
(b) forming a plurality of lateral passageways in the underground below the floor slab so as to extend outwardly from said sump hole along and below the floor slab at a level not lower than a level of a footer extending below and about an outer perimeter of the floor slab and to terminate at points at an interior side of the footer;
(c) inserting a plurality of perforated hollow collection pipes into the lateral passageways such that outer ends of said collection pipes extend to the interior side of the footer and inner ends of said collection pipes are disposed in flow communication with said sump hole;
(d) placing a perforated drum into said sump hole such that said inner ends of said perforated collection pipes are disposed adjacent to said perforated drum;
and
(e) placing a sump pump into said sump hole for pumping from said sump hole drainage water discharged into said sump hole from said collection pipes.

3 more elements

A method of retrofitting an underground water drainage sump system to below a floor slab for protecting the floor slab, said retrofitting method comprising the steps of:

(a) forming a sump hole to extend through a floor slab and into underground below the floor slab;
(b) forming a plurality of lateral passageways in the underground below the floor slab so as to extend outwardly from said sump hole along and below the floor slab at a level lower than a level of a footer extending below and about an outer perimeter of the floor slab and to terminate at points past an exterior side of the footer;
(c) inserting a plurality of perforated hollow collection pipes into the lateral passageways such that outer ends of said collection pipes extend past the exterior side of the footer and inner ends of said collection pipes are disposed in flow communication with said sump hole;
(d) placing a perforated drum into said sump hole such that said inner ends of said perforated collection pipes are disposed adjacent to said perforated drum;
and
(e) placing a sump pump into said sump hole for pumping from said sump hole drainage water discharged into said sump hole from said collection pipes.

3 more elements

A method of retrofitting an underground water drainage sump system to below a floor slab for protecting the floor slab, said retrofitting method comprising the steps of:

(a) forming a sump hole to extend through a floor slab and into underground below the floor slab;
(b) forming a plurality of lateral passageways in the underground below the floor slab so as to extend outwardly from said sump hole along and below the floor slab at two different levels and lengths to and beyond a footer extending below and about an outer perimeter of the floor slab, a first group of said lateral passageways extending at a first level not lower than the level of the footer to points of termination on an interior side of the footer, a second group of said lateral passageways extending at a second level lower said first level and lower than the level of the footer to points of termination past an exterior side of the footer;
(c) inserting a plurality of perforated hollow collection pipes into the lateral passageways such that outer ends of said collection pipes extend to the interior side of the footer and inner ends of said collection pipes are disposed in flow communication with said sump hole;
(d) placing a perforated drum into said sump hole such that said inner ends of said perforated collection pipes are disposed adjacent to said perforated drum;
and
(e) placing a sump pump into said sump hole for pumping from said sump hole drainage water discharged into said sump hole from said collection pipes.

3 more elements

In combination with a floor slab having an outer perimeter, a sub-slab underground depressurization system for removal of polluting gases, said system comprising:

(a) a sump hole formed through the floor slab and extending into underground below the floor slab;
(b) a plurality of lateral passageways formed in the underground below the floor slab so as to extend outwardly from said sump hole along and below the floor slab to the vicinity of the outer perimeter of the floor slab;
(c) a plurality of perforated hollow collection pipes disposed in said lateral passageways such that outer ends of said collection pipes extend to the vicinity of the outer perimeter of the floor slab and inner ends of said collection pipes are disposed in flow communication with said sump hole;
(d) a perforated drum disposed in said sump hole such that said inner ends of said perforated collection pipes are disposed adjacent to said perforated drum;
and
(e) a vacuum-generating means disposed in said perforated drum for drawing gases into said sump hole from said porous collection pipes and for exhausting said gases from said sump hole and thereby enabling sub-slab depressurization for removal of polluting gases.

3 more elements

Dependencies are inferred from the claim text.

Underground drainage sump system and method of retrofitting for protecting a floor slab

Life of this patent

Underground drainage sump system and method of retrofitting for protecting a floor slab

Life of this patent

Abstract

Claims40