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| Number | Title | Issue Date |
| 7722293 | Methods for constructing underground structures Described herein are apparatus, systems and methods useful in forming underground vertical structures. Methods are described for constructing an underground vertical structure, comprising the steps of excavating soil to a sufficient depth to create a circular void t... | 05/25/2010 |
| 7267505 | Mine ventilation panel system A panel system for making mine ventilation structures. The panel system comprises a plurality of elongate metal panels having flanges along sides thereof configured for overlapping one another when the panels are placed in side-by-side relation. When the panels are ... | 09/11/2007 |
| 7083360 | Method for rehabilitating an existing pipe Segments are successively coupled in the circumferential direction and the vertical direction to provide a rehabilitating pipe that rehabilitates an exiting pipe such as a manhole extending in the vertical direction. The segments are coupled in the vertical directio... | 08/01/2006 |
| 7025537 | Subterranean structures and methods for constructing subterranean structures One embodiment of the present invention provides for a subterranean structure, having a continuous ribbon slab having a plurality of flights fabricated from concrete. The ribbon slab defines periodic openings therein which generally align between adjacent flights. A... | 04/11/2006 |
| 7004684 | Method for construction of piers in soil and a pier construction Apparatus and an associated method for forming a pier in a soil matrix includes a hollow tube with a restricted expansion section connected to and adjacent a soil penetrating bottom head element which is configured to facilitate discharge of pier forming material su... | 02/28/2006 |
| 6955232 | Equipment for drilling vertical boreholes The invention relates to equipment for drilling a vertical borehole in hard ground, the equipment comprising: casing put successively into place in the borehole; a drilling machine having a rotary cutting head and ... | 10/18/2005 |
| 6431789 | Method and apparatus for adjusting fiberglass manholes A fiberglass manhole adjustment ring comprising a fiberglass pipe and a self-centering lip attached to the edge of the pipe, and a method for installing the fiberglass manhole adjustment ring in an existing fiberglass manhole. The self-centering lip can e... | 08/13/2002 |
| 6409226 | "Corrugated thick-walled pipe for use in wellbores" Thick-walled steel pipe is corrugated for the purpose of managing axial load when the pipe is used in an earth-restrained application. For example, the pipe may be used as casing in a cyclic steam stimulation well, where the axial loads are induced as the... | 06/25/2002 |
| 6050746 | Underground reinforced soil/metal structures A method for controlling deformation of an erected structural metal plate culvert or underpass during backfilling of the erected structure comprises: building progressively a reinforced earth retaining system on each side of the erected structure by alter... | 04/18/2000 |
| 5855452 | Method for excavating rock cavities In a method for excavating rock cavities in the form of substantially cylindrical, vertical or low placed rock cavities for the storage of gas, fluid, solid products or for another purpose, one first, from a transport tunnel (2), excavates an upper circul... | 01/05/1999 |
| 5824912 | Method of roof control in an underground mine Stresses in an underground mine are determined by analyzing mechanical properties of mine site stratum including Young's modulus. The mechanical properties are combined with the physical layout of the mine. From the application of the mechanical propertie... | 10/20/1998 |
| 5595459 | Cofferdam for 4', 8' and 12' diameter tanks A hole shoring device that includes a support frame, a first hollow octagonal shaped sleeve, a frame linkage, a hollow second octagonal shaped sleeve, a first linkage, a second hollow octagonal shaped sleeve, a second linkage, a third hollow octagonal sha... | 01/21/1997 |
| 5516237 | Process to anchor a post or a string of posts in the ground, and anchoring pier of a post or a string of posts produced by the practice of this process There is dug in the ground (2) by means of a digging tool, a hole in which is sunk at the same time and progressively a hollow prefabricated casing element (5) of corresponding shape. When the hole has the depth necessary to receive completely the hollow ... | 05/14/1996 |
| 5490744 | Method and apparatus for inflating and curing a resin impregnated manhole liner An apparatus and method for inflating and curing a resin impregnated liner include a resin impregnated liner lowered into an underground structure so that a portion of the liner extends beyond the structure. The protruding portion of the liner is then sea... | 02/13/1996 |
| 5474399 | Open cutting by floor slab braced retaining wall An open cutting to construct a raft foundation right after the first excavation, and to use the raft foundation as a work stage for constructing ground and basement floor slabs by fixing floor-forms to the top-slab thereof. As the raft foundation is lower... | 12/12/1995 |
| 5417519 | Formwork apparatus The formwork assembly (10) is used to cast tubular or part-tubular structures, one particular application being in the lining of mine ore passes with a concrete lining (54). The assembly includes an internal framework (12, 14, 32; 100, 102, 104) and exter... | 05/23/1995 |
| 5401122 | Excavation shield apparatus and method An excavation shield apparatus (10) and method prevent the collapse, or cave-in, of soil about a hole in the ground having one or more utility apparatus. The excavation shield apparatus (10) comprises a longitudinal body (11) having a lateral perimeter wa... | 03/28/1995 |
| 5302052 | Underground work chamber assembly and method for the construction thereof An underground work chamber assembly including a chamber, elevator shaft, air path, utility path, and slotted grout pipes which is assembled as lowered into a drilled hole on dry land or underwater, the slotted grout pipes facilitating a controlled grouti... | 04/12/1994 |
| 5265981 | System and method for rehabilitating a manhole, and manhole rehabilitated thereby A liner assembly for a manhole comprises a multiple ply generally cylindrical tube. The outermost ply is adapted for being impregnated with material for rigidifying and bonding the outermost ply to a manhole. The innermost ply is adapted for being impregn... | 11/30/1993 |
| 5261766 | Vertical bore hole system and method for waste storage and energy recovery Vertical bore holes are constructed for municipal sanitary landfills by drilling or otherwise excavating holes of large dimension to substantial depth, in virtually all known soil conditions however variable. They can be excavated well below the groundwat... | 11/16/1993 |
| 5197827 | Method for lowering a basement structure A method for lowering a basement structure includes forming several upright pile holes in the ground, providing each of the pile holes with a pile, providing several vertical guide holes and an excavation passage which are formed through the basement stru... | 03/30/1993 |
| 5176470 | Water-tight bore shaft foundation The lower end of an outwardly tight shaft structure (3) for a bore shaft (1) rests on a tilting joint arrangement (15, 20). This arrangement includes a hydraulic thrust bearing (15) at the end face of the shaft structure (3) and a hydraulic annular cylind... | 01/05/1993 |
| 5135328 | Process for constructing basement A basement is constructed by the steps of: (a) excavating spaced vertical holes along the border of a construction site to the depth of bearing strata for the basement; (b) forming piles at the bottoms of the vertical holes; (c) erecting steel posts in th... | 08/04/1992 |
| 5131789 | Mill hole liner ring connector assembly A connector assembly for use in fastening two plate members together, particularly such members may be mill hole liner ring segments or mill hole liner rings which are fastened together to form a mill hole chute. The connector assembly is comprised of a c... | 07/21/1992 |
| 5078545 | Method for boring hole in the ground and apparatus therefor A system for boring a hole in the ground including an excavating machine provided with a tubular body; an excavating mechanism supported by the body; a mechanism for shifting the excavated substances to the periphery of the body; and a driving mechanism f... | 01/07/1992 |
| 5044822 | Open bottom pit seal A sealing system is provided for a prefabricated pit for servicing an aircraft that is formed with an open bottom and an inner cylindrical wall for surrounding a riser pipe therewithin. An annular rubber boot having annular inner and outer marginal edges ... | 09/03/1991 |
| 5026209 | Containment casing for a deep well gravity pressure reactor vessel A containment casing (10) for a deep well/gravity pressure reactor vessel includes a plurality of casing sections (11) each having a wall portion (20) with corrugations (21). An inner liner (24) and an exterior liner (25) prevent grout material (13) from ... | 06/25/1991 |
| 5022789 | Method and machine for constructing shafts There are disclosed a method and a machine for constructing a shaft having a substantially circular cross-section. According to the present invention, the shaft having a shotcrete formed on a peripheral wall thereof can be easily constructed. The shotcret... | 06/11/1991 |
| 5002434 | Method and apparatus for placing a hollow column in the hard bottom of a body of water in particular in a rock bottom Method and apparatus for lowering a heavy hollow column into hard soil and rock at the bottom of a body of water which column has a downwardly widening outer surface and a sharp lower edge. By means of plurality of suction nozzles erosive water flows are ... | 03/26/1991 |
| 5002438 | Method of rehabilitating manholes by custom lining/relining A method for lining or relining a sewer manhole, apparatus comprising an improved leak resistant manhole, and a cementitious mixture for lining/relining manholes. A homogeneous, monolithic, cementitious liner is spray applied in place within a concrete or... | 03/26/1991 |
| 4991999 | Corrugated structural panels An improvement in corrugated structural panels, useful in the construction of tunnels, shoring, and other pressure bearing or containing structures, wherein the improvement comprises the utilization of a prism element transverse to the longitudinal axis o... | 02/12/1991 |
| 4973197 | Silos and methods of burying same A silo or like structure (16) adapted to be driven end first into the ground comprising an elongate body, wherein the body is enlarged at one end thereof, wherein the enlarged portion carries a cutter (28) directed axially away from the body so as to form... | 11/27/1990 |
| 4920722 | Composable well A composable well of right prismatic or right cylindrical shape has a polygonal or circular base respectively, and consists of a plurality of walls (1), the walls having on their lateral borders, on one side a plurality of hooking elements (2) of male typ... | 05/01/1990 |
| 4911586 | Plug for pier hole An inflatable, stretchable plug for obstructing a hole drilled in the ground for a foundation pier comprises a sturdy elastic envelope having an air valve mounted in the wall thereof for connection with outside supply of pressurized air and a handle bonde... | 03/27/1990 |
| 4863311 | Lining for bore holes in salt domes To store radioactive materials in bore holes of salt domes these bore holes are lined with superimposed tubular sections made of metallic material including in each case of an outer ring and an inner ring which are securely joined together by an intermedi... | 09/05/1989 |
| 4797031 | Caisson sinking method A caisson sinking method comprises the steps of excavating the ground to make a support ditch having the same plan-view shape as a caisson to be sunk, casting into the excavated ditch a bearing material that can carry the caisson as supported in the ditch... | 01/10/1989 |
| 4723872 | Trapezoidal divider wall for use in shaft construction A curtain wall (12) used to divide the shaft in a shaft construction (10) is made of panels (26) in the shapes of parallelograms. Side edges (28 and 30) of the panels (26) are received in channels (18 and 20) in the peripheral wall (16) of the shaft const... | 02/09/1988 |
| 4717285 | Cistern for liquid or gas, constructed of reinforced concrete The invention concerns a cistern structure intended to be used as a subterranean cistern. The shell of the cistern has been formed of a material impermeable to the substance to be stored therein. The shell of the cistern has been encircled with mutually s... | 01/05/1988 |
| 4701073 | Shaft sinking method A method of sinking shafts comprising excavating a series of lifts wherein each lift is excavated by drilling a pattern of blast holes for the full depth of the lift including boring a large diameter hole and creating a chamber at the lower end of the lar... | 10/20/1987 |
| 4685830 | Mineshaft closures The present specification discloses a disclosure for sealing off dis-used open mineshafts. The closure comprises an open topped basket-like framework which has a polygonal shape with a side wall which tapers from the open top towards the base of the baske... | 08/11/1987 |
