Disclosed is a shielding apparatus for high-depth groundwater well pollution prevention grouting comprising: a shielding portion which is provided on the outer circumferential surface of a grouting casing installed in an excavation hole in the ground and compressed to be in close contact with a hollow wall of the excavation hole; a compression portion which is provided on the outer circumferential surface of the grouting casing and formed to descend toward the shielding portion and brings the shielding portion into close contact with the hollow wall of the excavation hole to guide the excavation hole to be sealed; and a pressure equalization injection tube portion which is connected with the compression portion on the outer circumferential surface of the grouting casing and lowers the compression portion by water pressure generated by supplying water from the outside through a water supply tube.

A ground water flow device 1 has a support element 3 and a filter sheet 5. The filter sheet 5 has a first side 7 and a second side 9. Tubes 13 are provided with flow apertures 11 which are large enough to allow the passage of water and soil particles. The tubes 13 each have an inner space 17. The tubes 13 each hold one of the filter sheets 5 in their inner space 17. A first part of the flow apertures 11 is facing the first side 7 of the filter sheets 5 and a second part of the flow apertures 11 is facing the second side 9 of the filter sheets 5, defining in each tube 13 a flow path 19 for ground water from the first part of the flow apertures 11 through the filter sheet 5 to the second part of the flow apertures 11.

A ground water flow device 1 has a support element 3 and a filter sheet 5. The filter sheet 5 has a first side 7 and a second side 9. Tubes 13 are provided with flow apertures 11 which are large enough to allow the passage of water and soil particles. The tubes 13 each have an inner space 17. The tubes 13 each hold one of the filter sheets 5 in their inner space 17. A first part of the flow apertures 11 is facing the first side 7 of the filter sheets 5 and a second part of the flow apertures 11 is facing the second side 9 of the filter sheets 5, defining in each tube 13 a flow path 19 for ground water from the first part of the flow apertures 11 through the filter sheet 5 to the second part of the flow apertures 11.

A method for stabilizing a slab foundation comprises a narrow, vertical moisture barrier assembly spaced outside and surrounding the perimeter grade beam of the slab foundation by a predetermined distance, and extends to preferably five feet below surface grade. The narrow trench for the barrier is preferably less than three inches wide. A membrane formed of a synthetic composition forms a moisture barrier against one wall of the narrow trench, and is held in place by back fill. The moisture barrier is intended for use in expansive soils that are subject to shrinking and swelling.

A method for stabilizing a slab foundation comprises a narrow, vertical moisture barrier assembly spaced outside and surrounding the perimeter grade beam of the slab foundation by a predetermined distance, and extends to preferably five feet below surface grade. The narrow trench for the barrier is preferably less than three inches wide. A membrane formed of a synthetic composition forms a moisture barrier against one wall of the narrow trench, and is held in place by back fill. The moisture barrier is intended for use in expansive soils that are subject to shrinking and swelling.

A method for stabilizing a slab foundation comprises a narrow, vertical moisture barrier assembly spaced outside and surrounding the perimeter grade beam of the slab foundation by a predetermined distance, and extends to preferably five feet below surface grade. The narrow trench for the barrier is preferably less than three inches wide. A membrane formed of a synthetic composition forms a moisture barrier against one wall of the narrow trench, and is held in place by back fill. The moisture barrier is intended for use in expansive soils that are subject to shrinking and swelling.

A method for stabilizing a slab foundation comprises a narrow, vertical moisture barrier assembly spaced outside and surrounding the perimeter grade beam of the slab foundation by a predetermined distance, and extends to preferably five feet below surface grade. The narrow trench for the barrier is preferably less than three inches wide. A membrane formed of a synthetic composition forms a moisture barrier against one wall of the narrow trench, and is held in place by back fill. The moisture barrier is intended for use in expansive soils that are subject to shrinking and swelling.

A grout free expandable standpipe (10) and methods for its use for anchoring into ground formation (22) and injecting grout into the ground formation (22), without the need for first grouting the standpipe (10) into the ground formation (22). The expandable standpipe (10) has a swage seal (43) that can be expanded with a swage tool, such as, for example, a unitary construction inflatable swage packer (60), or similar, for anchoring and sealing the standpipe (10) into a pilot hole (16), without the need for grout. A grouting hole (96) can then be drilled through the bore of the expandable standpipe (10) and into the ground formation. Then grout can be injected into the ground formation (22) via the grout hole (96) without having to wait up to around 24 hours for grout to cure and harden to anchor and seal the expandable standpipe (10) into the pilot hole (16).

A grout free expandable standpipe (10) and methods for its use for anchoring into ground formation (22) and injecting grout into the ground formation (22), without the need for first grouting the standpipe (10) into the ground formation (22). The expandable standpipe (10) has a swage seal (43) that can be expanded with a swage tool, such as, for example, a unitary construction inflatable swage packer (60), or similar, for anchoring and sealing the standpipe (10) into a pilot hole (16), without the need for grout. A grouting hole (96) can then be drilled through the bore of the expandable standpipe (10) and into the ground formation. Then grout can be injected into the ground formation (22) via the grout hole (96) without having to wait up to around 24 hours for grout to cure and harden to anchor and seal the expandable standpipe (10) into the pilot hole (16).