US20200224445A1

US20200224445A1 - System, method and apparatus for servicing support poles

Info

Publication number: US20200224445A1
Application number: US16/743,991
Authority: US
Inventors: Thomas Stephen Rooney
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-01-15
Filing date: 2020-01-15
Publication date: 2020-07-16
Also published as: US20210172150A1; US20210156112A1; WO2020150748A1

Abstract

An annulus excavation tool that would surround the decayed pole or pile and hydraulically excavate the annulus around the pole down to −2.0′ via a jetting manifold. A vacuum/tremie manifold is selectively coupled to a vacuum source to remove the soil and decayed material and creating a bonding surface for the mortar. The annulus tool would then be coupled to the mortar source and raised while a UHPC mortar would be tremied into the tool for delivery into the annulus. When the tool reaches ground level the rest of the pour is done using a Sonotube or other temporary form. This mortar encasement not only makes up for the structural deficiencies but also isolates the pole from both air and water which then kills the existing fungi and insects while also preventing any future invasion.

Description

CROSS-REFERENCE TO RELATED APPLICATION

This application claims the benefit of priority of U.S. provisional application No. 62/792,672, filed Jan. 15, 2019, the contents of which are herein incorporated by reference.

BACKGROUND OF THE INVENTION

The present invention relates to utility poles and structural poles, and more particularly to the prevention and remediation of decay in wooden structural poles proximal to their insertion point in a ground surface.
There are over 150 million wooden utility poles and about 50 million wooden structural piles in service domestically today. The utility poles are used to support wires for both power and telecommunication. The wooden structural piles support all types of structures including buildings, foundations, RR trusses, bridges, piers, marinas, docks and wharfs. Most of these poles and piles have been pressure treated with some type of preservative, such as creosote, penta, or CCA. As the preservative depletes over time, the poles/piles become susceptible to biotic degradation caused by moisture, fungi, and insect activity.
In order for this decay to flourish the environment around the wood poles require moisture, oxygen, heat, and food. Most of the decay therefore occurs around the base of the pole/pile where it enters the ground surface (typically from +0.5′ to −1.5′) where these conditions are present. The presence of this decay has left many poles weakened structurally and badly in need of remediation.
Piles installed in marine conditions have fungi and insect damage at the waterline. In addition they are subject to marine borer attack. Of these borers, Gribbies attack primarily at the tide line. Others like Shipworm and Pholads attack under water and in the mud.
Millions of poles are remediated every year to correct both structural deficiencies and to stop fungi and insect infestation. The present state of the art of utility poles is first, to dig an 18″ deep and 12″ wide annulus/hole around the base of the pole to enable the removal of the decayed wood material on the pole exterior, cleaning the pole, and then treating the pole with a chemical substance to slow future insect activity. In the event of serious structural loss due to damage and decay, a truss or other structural member is driven into the ground alongside the pole. The truss is then banded to the pole so the new structural member can replace the structural integrity of the pole lost to the decay.
In the case of structural piles hand dig around the pile, clean out the decay, secure reinforcement, apply carbon fiber wrap and encapsulate with epoxy resin.
This current method is labor intensive and expensive. It doesn't solve the decay problem permanently as the insects will still come back. The solution is also aesthetically not acceptable in many locations. Likewise, use of the preservation chemical is not always environmentally acceptable in certain locales.
As can be seen, there is a need for a pole repair method that achieves both the stopping of the insect decay of the poles and also restores the structural integrity of the pole, in the same operation taking advantage of this cost efficiency. This invention will result in a one step process where the pole will be remediated structurally but also will no longer have water or air access and therefor will no longer need any further treatment.

SUMMARY OF THE INVENTION

In one aspect of the present invention, an annulus excavation tool is disclosed. The annulus excavation tool includes a cylindrical sidewall dimensioned to surround a circumference of a support pole to be serviced. A jetting manifold is configured to receive a pressurized fluid source. A plurality of spaced apart fluid jets are in fluid communication with the jetting manifold. The plurality of fluid jets are disposed in a spaced apart relation within an interior of the cylindrical sidewall and are oriented to eject the pressurized fluid downward towards a ground surface surrounding the support pole.
A vacuum/tremie manifold is configured for communication with a vacuum source. A plurality of vacuum/tremie ports are in communication with the vacuum/tremie manifold. The plurality of vacuum/tremie ports are disposed in a spaced apart relation within the cylindrical sidewall and are oriented to evacuate a back fill material from the ground surface surrounding the support pole to define a void.
In some embodiments, the annulus excavation tool also includes a plurality of auxiliary jets oriented towards an interior of the cylindrical sidewall. The plurality of auxiliary jets direct the pressurized fluid source against an exterior surface the support pole. In other embodiments the plurality of auxiliary jets are oriented towards an exterior of the cylindrical sidewall.
In some embodiments, the annulus excavation tool is formed with a plurality of segments. Each segment includes a portion of each of the cylindrical sidewall, the jetting manifold, the vacuum/tremie manifold; the plurality of fluid jets, and the plurality of vacuum/tremie ports. A fastener may join each of the plurality of segments.
In other embodiments, the vacuum/tremie manifold and the plurality of vacuum/tremie ports are configured to deliver a liquid mortar mix into the void.
In other aspects of the invention, a method of reinforcing a support pole is disclosed. The method includes attaching an annulus excavation tool around a support pole installed in a ground surface, the annulus excavation tool having a cylindrical sidewall. A pressurized fluid source is applied to the annulus excavation tool. The pressurized fluid source is applied to dislodge a backfill material retaining the support pole in the ground surface by a plurality of fluid jets disposed in a spaced apart relation around an interior surface of the cylindrical sidewall of the annulus excavation tool.
In other embodiments, the method includes evacuating the dislodged backfill material by a vacuum source applied to a plurality of vacuum/tremie ports. The vacuum/tremie ports are disposed in a spaced apart relation about the annulus excavation tool.
In other embodiments, the pressurized fluid is directed against a decayed surface of the support pole via a plurality of inwardly oriented auxiliary jets in communication with the pressurized fluid source.
The method may also include selectively lowering the annulus excavation tool to progressively dislodge and evacuate the backfill material to a desired depth in the ground surface. The desired depth may be defined at a point below the decayed surface of the support pole.
In yet other steps, the method includes injecting a liquid mortar mixture through the vacuum/tremie ports to fill a void around the support created by the evacuation of the dislodged backfill material. The method may also include selectively withdrawing the annulus excavation tool to fill the void with the liquid mortar mixture.
In other embodiments, the method includes applying a sonotube or a temporary steel form, around the support pole. The sonotube extends a desired vertical distance above the ground surface. The liquid mortar mixture may then be poured into the sonotube. The sonotube may be filled with the liquid mortar mixture to the desired vertical distance.
In yet other aspects of the invention, a system for servicing a support pole installation is disclosed. The system includes an annulus excavation tool having a plurality of jets oriented to direct a pressurized fluid source to dislodge a backfill material retaining the support pole in a ground surface. A plurality of vacuum/tremie ports selectively evacuate the dislodged backfill material to define a void around the support pole and communicate a liquid mortar to fill the void. A reservoir containing a volume of the fluid and a pressure delivery pump in communication with the reservoir are also provided. A suction pump selectively communicates with the plurality of vacuum/tremie ports and a soil decant is provided to contain a quantity of the evacuated backfill material.
In some embodiments, a mixing unit is configured to mix a predetermined quantity of the liquid mortar. A tremie pump is provided that is in communication with the mixing unit to selectively deliver the liquid mortar to the vacuum/tremie ports.
In other embodiments, a materials container is configured to communicate a predetermined quantity of a dry mortar mix to the mixing unit.
In other embodiments, a storage unit is provided for storing the annulus excavation tool and a generator for powering one or more of the pressure delivery pump, the suction pump, the tremie pump, and the mixing unit.
In yet other embodiments, a control station has a plurality of controls for operating one or more of the generator, the pressure delivery pump, the suction pump, the tremie pump, and the mixing unit.
These and other features, aspects and advantages of the present invention will become better understood with reference to the following drawings, description and claims.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1a is a view of a damaged utility pole utilizing a repair method according to aspects of the invention.

FIG. 1b is a close up view of a damaged utility pole utilizing the repair method.

FIG. 2a is a side elevation view of a trailer mounted system for repairing a support pole annulus according to aspects of the invention.

FIG. 2b is a top plan view of the trailer mounted system for repairing a support pole annulus.

FIG. 3 is a flow chart of the stages of the a support pole repair process.

FIG. 4 is an image depicting four stages in the support pole repair process.

FIG. 5 is a top plan view of an the annulus tool 40.

FIG. 6 is a cross section view of the annulus tool 40.

DETAILED DESCRIPTION OF THE INVENTION

The following detailed description is of the best currently contemplated modes of carrying out exemplary embodiments of the invention. The description is not to be taken in a limiting sense, but is made merely for the purpose of illustrating the general principles of the invention, since the scope of the invention is best defined by the appended claims.
Broadly, embodiments of the present invention provide a system, method, and apparatus for the prevention and restoration of decayed support timbers that have a base end that is driven into or buried in a ground surface. The support poles may include: utility poles, support pylons for piers, retaining walls, elevated construction, and the like.
As seen in reference to the non-limiting embodiment shown in FIGS. 1A and 1B, aspects of the present invention include a support pole 10 having a decayed area 12 proximal to a ground surface 14 into which a base end of the support pole 10 is buried. The decayed area 12 of the support pole 10 may be repaired by the application of an encasing annulus 16 surrounding the support pole 10 above and below the ground surface 14. As will be appreciated, the ground surface 14 may be below the surface of a body of water in which the support pole 10 is emplaced. Preferably the encasing annulus 16 is formed of a concrete or a cementitious material.
Wood decay is present, primarily from +0.5′ to −1.5′ because moisture and oxygen are typically available at these depths. The types of decay that cause ground line failure to wooden utility poles include: soft rot or exterior rot; core rot; and brown rot. Soft rot is where the outer part of the pole is attacked by decaying organisms present in the soil. Core rot attacks the center of the pole. Although the figures show exterior rot this invention will cure both types of rot because water and oxygen can't infiltrate to the pole.
In the embodiment shown in FIGS. 1A and 1B, the invention when applied to a 40′ wooden utility support pole 10 with a bottom end 11 that is embedded in 6′ of soil. Wood decay 12 is present, proximal to the ground surface 14, primarily from a range of +0.5′ to −1.5′ relative to the ground surface 14. These dimensions are representative only, and are indicative of the condition of one of many of the millions of support poles 10 which are in need decay remediation. As will be appreciated with the benefit of the present disclosure, the encasing annulus 16 may be applied as a remedial measure for the restoration of a support pole 10 with decay 12 or the encasing annulus 16 may be applied in an original installation of a support pole 10.
A system for installation of an encasing annulus 16 to a decayed area 12 of a support pole 10 may be seen in reference to FIGS. 2A and 2B. The system may be mounted on a truck or a trailer 31 that is towed by a tractor vehicle 34 to carry equipment on site and between sites. The system provides a pressurized fluid source, a vacuum source, and a mortar delivery source. As described more fully below, an annulus tool 40 is utilized to direct a jet of a pressurized liquid, such as water, around the periphery of the support pole 10, to facilitate evacuation of the soils around the pole and define a void 36 in a space surrounding the decayed area 12 of the support pole 10. Use of the annulus tool 40 also includes suctioning off the released soils from the void 36 around the support pole 10. Use of the annulus tool 40 also includes injecting a mortar mixture 52 into the void 36 to form the encasing annulus 16.
With a basic understanding of the system from the foregoing, the system includes a control unit 20 for control of the system and one or more pumps 22. The control unit 20 controls the one or more pumps 22, which may include a pressurized delivery pump 22, a suction pump 22′ and, a tremie delivery pump 22″. The one or more pumps 22 are in fluid communication with the annulus tool 40 via a conduit 18 for each of the pressurized delivery pump 22, the suction pump 22′, and the tremie pump 22″.
The system also includes a storage container 24, preferably at a forward end of the trailer 31. The storage container 24 is utilized to secure the annulus tool 40, associated tools, conduits, connectors, and supplies for operation of the system. An electric generator for power required by the system may also be carried in the storage container 24 or otherwise mounted to the trailer 31.
A bulk storage 26 is provided for carriage and containment of a quantity of mortar mix, which may be carried in bulk, or in a plurality of bags. The bulk storage 26 may include a hopper to feed a mixing unit 30 to mix the mortar mix with a specified quantity of water, carried in a water reservoir 28 and in fluid communication with the mixing unit 30 and the pump 22. The mixing unit 30 may also receive predetermined quantities of other additives, such as plasticizers, colorants, and the like.
The mixing unit 30 should have a capacity of at least 2 cubic yards, a typical minimum quantity of mortar mix to pump into the void 36 to form the encasing annulus 16. When gunite is locally available, the trailer 31 may not utilize the mixing unit 30 or bulk storage 26. However, a mortar rehandling connection may also provided so that a gunite delivery truck can unload gunite to the trailer 31 and the gunite may be fed to the annulus tool 40 at the design delivery rate via the tremie pump 22″.
A soil decant unit 32 may be provided for containment and filtration of the backfill materials evacuated by the suction pump 22′ to limit undesirable dispersion of the fines and granular materials on the worksite for environmental containment.
The jetting hoses 18 from the trailer mounted equipment will be hooked up to a jet pipe manifold 44 of the annulus tool 40. A vacuum hose 18 will be connected to a vacuum and tremie manifold 54 of the annulus tool 40.
A method of using the annulus tool 40 and servicing system is shown in reference to FIGS. 3 and 4. In use, the selected size annulus tool 40 will be assembled around the pole 10 to be repaired. (FIG. 3, STAGE I). By way of non-limiting example, the annulus tool 40 may be formed of 2 sections of a schedule 10, 14″ OD steel pipe (or bent steel plate) that will be fixed together with a fastener, such as pin connections, bolts, or screws to join the lugs 45. Alternatively, a band fastener may be applied to the outer circumference of the cylindrical sidewall 43.
The annulus tool sections 41 may be separated from the support pole 10 with 2″×¼′ spacers 43 that may be welded to the inside of the arcuate wall segment 43. The spacers 43 may be ¾″ wide, ¼″ thick, and 4″ long skids on the interior face of the support pole 10 or pile to allow for sliding along a longitudinal length of the support pole 10. The spacers 43 may be 4″ long and spaced with 4″ openings. In the embodiment shown, the spacers 43 divide the annulus tool into 8 sections. Each section created by the spacers 43 may have two jetting nozzles 46 and at least one 1.75″ inch pipe for the vacuum/tremie port 56 for removal of dislodged back fill material and decayed wood waste and will be used later for tremieing the liquid mortar 52. The opening may optionally have provisions to receive at least one ½″ fiber or steel reinforcing rod 60. In some embodiments, the annulus tool 40 may be provisioned with one or more underwater cameras 70 at a bottom end of the annulus tool 40 (one on each half) to observe when the bottom of the support pole 10 is clear of decayed material 12.
As would be understood, the support poles 10 may have a taper on the order of ¼″ in the 4′ length of the annulus tool 40. The spacers may have to have a ¾″ skid on the surface next to the support pole 10. The tool may have to be loosely fit in the beginning of the descent to allow for that taper.
When the back fill material is sand or silt the material will have no trouble vacuuming to the surface. Stiff clay may come out initially too large or sticky to go up the 1.5″ vacuum pipe. The 1.5″ vacuum pipes will be nozzled down to 1.25″ at the bottom to prevent marginal size gravel from entering the pipe and forcing them to the bottom. Likewise, larger gravel may have difficulty moving to the surface, and that is an additional reason for the camera 70. The annulus tool 40 may have to be picked up and then re-jet some of the clay or jet the large gravel to the bottom. A vibrator attached to the annulus will enable the large gravel to descend downward. Some of the finer material may be carried up the void and bypass the vacuum on the ground surface 14.
Disposal of the Waste Soil—The volume of the annulus and the amount of solid soil to be disposed of is on the order of 4.2 cubic feet. With a 10:1 dilution the volume of the solution of soil and water is approximately 315 gallons. When the material is predominately granular it can be disposed of around the base of the mortar collar. When there is a solution of fines in an urban setting, the 315 gallons may be collected to be hauled off site. In a rural setting the solution of fines could probably be diked, or contained on the land.
Tremie the Mortar—After the cameras 70 clear the annulus at elevation −2.0 the vacuum conduit 18 will then be connected to the tremie pump 22″ for delivery of the liquid mortar 52 and the tremie/fill process will begin. With the reinforcing rods 60 in place, the annulus tool 40 is selectively raised by hand or a lifting mechanism, slowly as the void 36 is progressively filled with the mortar grout 52. The system may also include an electric winch may be attached to the support pole 10, if needed, to selectively raise the annulus tool 40 when there is resistance. One or more vibrators may be available to assist in lowering and raising the tool, if needed. The one or more vibrators may also facilitate consolidation and compaction of the liquid mortar mix 52.
Pouring the Above Ground Segment—The annulus tool 40 is removed at grade 14 and a Sonotube form 38, fabricated from a reinforced cardboard, plastic, fiberglass, metal, or the like, is inserted to replace the cylindrical shaped annulus tool 40. The pour pf the liquid mortar 52 is then completed to a desired vertical distance above the ground surface 14. The desired vertical distance is typically from 0.0′ to +1.0′ above the ground surface 14. When servicing pilings 10 in the vicinity of a body of water, the desired vertical distance may be selected based on a high watermark, a high tide level, or other desired clearance to prevent deterioration of the piling 10 by the waters contained in the body of water. In the case of some applications, a composite pole may be used with the mortar poured as high as 14.0′ elevation to not only remove the decay but fire proof the pole and achieve a major increase in the strength of the pole.
As with the subterranean pour, a small vibrator may be provided for compaction of the elevated pour. The above pour should continue immediately after the first pour so the first pour of mortar grout 52 is still wet and a suitable bond is achieved between the subterranean and above ground pours.
The historical method of installing wood utility poles 10 was to drill a hole that is at least 8″ larger in diameter than the butt end of the pole 10. Then the pole 10 is plumbed and centered in the hole for its desired vertical orientation. If the excavated material is suitable then the surrounding hole is back filled with the excavated material in 6″ compacted lifts to get the lateral support necessary to support the pole 10. Suitable back fill materials exclude bedrock, boulders, soft clay or silt and poorly graded sand and any material when there is water in the hole. If the backfill material was unsuitable, the installation would used a select fill of well graded granular material or pea gravel or crushed limestone, typically to a minus 5 sieve. Accordingly, after assembly of the annulus tool 40 to the support pole 10, the 2″ annulus in this invention will be jetted down in the backfill material that was recompacted in the initial installation of the support pole 10 in a 4″ soil annulus and the jetting should be relatively easy and can be done in any geological site condition.
Dislodging the backfill material—The basic design shows 2 jets with ½″ plastic pipe per section or a spacing of every 2.5″. The jets may be low pressure in environments with a sand back fill material and a high pressure in stiff clay back fill material. The jet piping may be PVC in low pressure and copper or other metallic material in high pressure conditions. The plurality of jets 48 may have a rotating or a revolving conical head of about 30 degrees and be similar to jets used in sinking sheet piling. The jets 48 may be oriented on a 10-degree angle toward the support pole 10. A collection manifold may be formed of 1.5″ plastic pipe at the top of the annulus tool 40 on each half section and high-pressure hoses 18 connected to each of the manifolds (FIG. 5). The hoses will join in a “Y” connection and go to the pump 22.
Vacuuming the Soil—The vacuum/tremie ports 56 will also collect with a manifold 52 at the top of each half section and suction hoses 18 connect to them also. The suction hoses 18 may join in a “Y” connection and go to the vacuum pump 22′.
The annulus tool 40 according to aspects of the invention is shown in reference to FIGS. 5 and 6. The annulus tool 40 may include at least two segments 41, 41′ that are connectable to surround the circumference of the support pole 10 to be repaired. The annulus tool 40 may have a support frame defined by an arcuate wall segment 43 having connecting lugs 45 to retain the annulus tool 40 around the circumference of the support pole 10. An annular support plate 49 extends from an outer surface of the arcuate wall segment 43 and supports a jetting manifold 42. When the segments 41 and 41′ are joined, the arcuate wall segments 43 define a cylindrical wall surrounding an outer circumference of the support pole 10. A top plate 53 is attached to a top end of the arcuate wall segment and supports a vacuum/tremie manifold 54.
The jetting manifold 42 is configured to communicate the pressurized fluid, such as water, via a plurality of spaced apart fluid jets 46 that extend downwardly from an interior of the arcuate wall segment and are oriented to eject the pressurized fluid downward towards the ground surface 14 surrounding the support pole 10. The jetting manifold 42 may also include a plurality of secondary fluid jets 48 that are configured to direct the pressurized fluid towards the decay region 12 of the support pole 10 to hydraulically remove the decayed wood 12 from the support pole 10 to be repaired.
The vacuum/tremie manifold 52 has a plurality of spaced apart tubes that are selectively coupled between a vacuum source and a source of mortar 52. When coupled to the suction pump 22′, a plurality of vacuum/tremie ports 56 are oriented to extract the hydraulic fluid and the fluidized fill material to evacuate the void 36 about the support pole 10. When coupled to a mortar source, the vacuum/tremie manifold 52 delivers a slurry of mortar mix 52 within the evacuated void 36 surrounding the support pole 10.
The annulus tool 40 may also carry a plurality of spacers 47 interposed between the plurality of fluid jets 46 and the plurality of vacuum/tremie ports 56. The spacers 47 are configured to carry reinforcing rods 60, such as rebar, which may be deposited in the mortar 52 as the annulus tool 40 is withdrawn from the void 36.
Since the support poles 10 may have differing outer diameters, different annulus tool 40 s may be required. As such, an inner diameter of the annulus tool 40 is dimensioned to correspond to that of a selected support pole diameter, or range of diameters. The support poles 10 to be remediated will have been surveyed so that the size of support pole 10 is known and an estimate of the decay amount 12 and location will be available.
Mortar Grout Design—The mortar mix 52 fill provides the strength and protective barrier to correct for the structural deficiencies from prior decay and to simultaneously seal the pole so water and oxygen can no longer infiltrate to the pole in the vulnerable area from elevation +0.5′ to −1.5′.
There have been recent developments in UHPC grouts that have substantially raised tensile and flexural strengths which will be useful in developing the bending strength required. Cement mortars that have high ultimate strain values resulting in first crack and strain values being much lower than normal concrete are also desirable. The UHPC grouts have attained bending strengths in the range of 3,000 to 3500 psi and this enables a repair that result in a support pole/pile 10 that is stronger than the original. At these levels re-bars 60 may not be necessary. These new grouts also are very dense with minimum voids resulting in total resistance to not only insects but any chemicals in the soil or water that would normally attack concrete.
To prevent air and water from infiltrating to the support pole 10 in the region where the decay 12 occurs (elevation +0.5′ to −1.5′) an encasing annulus 52 of fiber reinforced grout 52 is poured around the once decayed area 12 and at least 0.5 feet above and below the decayed area 12. The mortar mix 52 fills the void in the area evacuated by the annulus tool 40 suctioning as well as the voids in the support pole 12 that are introduced with the removal of the decayed wood 12 from the support pole 10.
A desirable mortar mix 52 may have the following characteristics to form an encasing annulus 16 a thickness of about 2″:
Either steel or polypropylene fibers—2% by volume;
Durability and toughness;
High ultimate strain value of over 5% so first crack and first strain values are significantly lower than normal concrete. This results in much less cracking at the ultimate load and results in the material being very ductile;
Shrinkage is low with additives;
Low permeability and high ductility;
Mix that can be pumped thru the conduit 18 and suction/tremie manifold 52 and 1.75″ pipe;
A bonding agent, if required; and
A plasticizer for workability and pumping.
The selected mix chosen should result in an impervious barrier to prevent water and air infiltration from getting to the pole 10. The grout 52 may be reinforced with a fiber reinforcing bar 60 embedded in the encasing annulus 16. The reinforcing bars 60 may be held in place by 1″ steel loops (“U” shaped brackets) welded to the annulus tool 40 and fixed at the top to the support pole 10. As the annulus tool 40 is withdrawn, the one or more reinforcing bars 60 stay in place. The upper ends of the one or more reinforcing bars 60 may be stapled to the support pole 10 to retain them in place. The reinforcing bars 60 may be a metallic rebar or a fiber reinforcing bar.
Application of the Invention
Utilities Mounted Vertically on the Support Pole—For grounding cables mounted to the support pole 10, simply unstaple and move out of the way for the repair and then restaple to secure the cable to the support pole 10. The grounding rod is normally out of way. For TV and Telephone wires, typically they are only buried about 12″ deep so they be unstapled and moved out of the way for the repair. After completion, the cables may be reconnected.
Power Cables—They are typically either 18″ or 24″ in depth and may have a plastic or metal enclosure on the pole. If they are enclosed or if there are more than one, the pole is probably not economical for utilization of the invention. Most of the occurrence of power lines on the pole 10 vertically occur when servicing an underground residential power supply and usually in urban areas.
Plastic Tool Design—The tool when constructed of steel weighs 200 pounds in total or 100 pounds per half. A tool made of high strength plastic may be provided to reduce the weight in the field (25 pounds/half) and to cut costs. The plastic tool may be cast as one unit with a plastic hinge.
Structural Piles—there are about 50 million wooden piles in the USA. They are located as follows:
Projects where the pile supports an upper structure and the annulus can be mounted with no concrete to be removed. Another example are crawl spaces. These projects would be performed with the procedures just like a normal pole repair project.
Projects where the pile is supporting and is embedded in concrete slabs or concrete pile caps. The concrete has to be removed to repair the pile and then it can be repaired like a normal pole project. The piles embedded in pile caps will probably be replaced and not repaired.
Marine Projects with a shallow water pile. Marine borers in the top 2′ of mud require jetting the annulus into the mud and then sealing the entire pile with grout up to the surface. This will structurally repair the decay at the tidal splash zone and prevent any future decay along the pile. Depending on the depth of water and tide range, the annulus will have to be longer than in a dry environment. The annulus will operate inside a taped and banded jacket or sonotube for 12 hours while the mortar sets up. The truck/plant may be on a barge or on top of the pier.
Marine Projects in deep water—in large ship wharfs (like 40′ deep) where there Is marine bore damage in the mud line and gibbles type insect damage in the tidal splash zone it may be economical to repair the pile in 2 steps. First mount the pile with the annulus system and lower it down into the mud line. Proceed with the standard jetting and Tremie method to a depth of 2′ in the mud. Then grout the mud line and then raise the annulus out of the mud until it is in the tidal splash zone The annulus would now need a form outside and below the annulus to contain the UHPC mortar. This form could be a plastic removable jacket that would be lowered into position at low tide. The annulus tool would then pump mortar as it was raised thru the jacket. The jacket would stay in place for 12 hours and then be recovered. Both high risk areas for marine bore and insect damage are now protected from future damage and the pile is returned to full strength.
Rail Road Trestles and Bridges—There are a lot of wood pile structures on rail road rights of way. Some piles 10 are on dry land and some over shallow bodies of water.
Repair Leaning Poles—Many utility poles are leaning due to high sustained winds or ground line decay damage or both together These leaning poles are prevalent in coastal areas. The procedure to return this pole to full capacity is as follows:
Drill the pole 10 to determine the amount of decay 12;
Attach a winch from tractor to a point high on the pole 10;
Loosen or hand auger the soil on the pull side of the pole 10;
Straighten the pole 10 with the winch;
Jet and pour annulus to −3.0′ elev. Use the method in this invention; and
Substitute a concrete ballast block for the tractor to free it up and leave that tension on overnight.
New Pole Application—This system may be also be applied to new piles right after they are installed. Simply jet the annulus tool down a half foot below the anticipated future damage area (−2.0′) and fill that annulus with the fiber reinforced grout. This can be done for a fraction of the cost of the damaged poles that need to be repaired. This would result in a stronger composite pile with no future decay issues.
Precasting the Mortar Annulus—New Pole—The 2″ mortar annulus 16 may be precast in a factory on the new wood pole and the composite structure installed in a larger hole.
It should be understood, of course, that the foregoing relates to exemplary embodiments of the invention and that modifications may be made without departing from the spirit and scope of the invention as set forth in the following claims.

Claims

What is claimed is:

1. An annulus excavation tool, comprising:

a cylindrical sidewall dimensioned to surround a circumference of a support pole;

a jetting manifold configured to receive a pressurized fluid source;

a plurality of fluid jets in communication with the jetting manifold, the plurality of fluid jets disposed in a spaced apart relation within an interior of the cylindrical sidewall and are oriented to eject the pressurized fluid source downward towards a ground surface surrounding the support pole;

a vacuum/tremie manifold configured for communication with a vacuum source; and

a plurality of vacuum/tremie ports in communication with the vacuum/tremie manifold, the plurality of vacuum/tremie ports disposed in a spaced apart relation within the cylindrical sidewall and oriented to evacuate a back fill material from the ground surface surrounding the support pole to define a void.

2. The annulus excavation tool of claim 1, further comprising:

a plurality of auxiliary jets oriented towards an interior of the cylindrical sidewall and direct the pressurized fluid source against an exterior surface the support pole.

3. The annulus excavation tool of claim 2, further comprising:

a plurality of auxiliary jets oriented towards an exterior of the cylindrical sidewall.

4. The annulus excavation tool of claim 1, further comprising:

a plurality of segments, wherein each segment comprises a portion of each of the cylindrical sidewall, the jetting manifold, and the vacuum/tremie manifold; the plurality of fluid jets, and the plurality of vacuum/tremie ports.

5. The annulus excavation tool of claim 4, further comprising:

a fastener to join each of the plurality of segments.

6. The annulus excavation tool, of claim 1, wherein the vacuum/tremie manifold and the plurality of vacuum/tremie ports are configured to deliver a liquid mortar mix into the void.

7. A method of reinforcing a support pole, comprising:

attaching an annulus excavation tool around a support pole installed in a ground surface, the annulus excavation tool having a cylindrical sidewall;

applying a pressurized fluid source to the annulus excavation tool; and

directing the pressurized fluid source to dislodge a backfill material retaining the support pole in the ground surface by a plurality of fluid jets disposed in a spaced apart relation around an interior surface of the cylindrical sidewall of the annulus excavation tool.

8. The method of claim 7, further comprising:

evacuating a dislodged backfill material by a vacuum source applied to a plurality of vacuum/tremie ports disposed in a spaced apart relation about the annulus excavation tool.

9. The method of claim 7, further comprising:

directing the pressurized fluid source against a decayed surface of the support pole via a plurality of inwardly oriented fluid jets in communication with the pressurized fluid source.

10. The method of claim 9, further comprising:

selectively lowering the annulus excavation tool to progressively dislodge and evacuate the backfill material to a desired depth in the ground surface.

11. The method of claim 10, wherein the desired depth is below the decayed surface of the support pole.

injecting a liquid mortar mixture through the plurality of vacuum/tremie ports to fill a void around the support pole created by evacuation of the dislodged backfill material.

12. The method of claim 11, further comprising:

selectively withdrawing the annulus excavation tool to fill the void with the liquid mortar mixture.

13. The method of claim 11, further comprising:

applying a sonotube around the support pole, the sonotube extending a desired vertical distance above the ground surface.

14. The method of claim 13, further comprising:

pouring the liquid mortar mixture into the sonotube.

15. The method of claim 14, further comprising:

filling the sonotube with the liquid mortar mixture to the desired vertical distance.

16. A system for servicing a support pole installation, comprising:

an annulus excavation tool having a plurality of jets oriented to direct a pressurized fluid source to dislodge a backfill material retaining the support pole in a ground surface, a plurality of vacuum/tremie ports to selectively evacuate the dislodged backfill material to define a void around the support pole communicate a liquid mortar to fill the void,

a reservoir containing a volume of the fluid;

a pressure delivery pump in communication with the reservoir; and

a suction pump in selective communication with the plurality of vacuum/tremie ports and a decant unit to contain a quantity of the evacuated backfill material.

17. The system of claim 16, further comprising:

a mixing unit configured to mix a predetermined quantity of the liquid mortar; and

a tremie pump in communication with the mixing unit to selectively deliver the liquid mortar to the vacuum/tremie ports.

18. The system of claim 17, further comprising:

a materials container configured to communicate a predetermined quantity of a dry mortar mix to the mixing unit.

19. The system of claim 18, further comprising:

a storage unit for storing the annulus excavation tool; and

a generator for powering one or more of the pressure delivery pump, the suction pump, the tremie pump, and the mixing unit.

20. The system of claim 19, further comprising:

a control station having a plurality of controls for operating one or more of the generator, the pressure delivery pump, the suction pump, the tremie pump, and the mixing unit.