CA3145663A1 - Pile cap auger - Google Patents
Pile cap augerInfo
- Publication number
- CA3145663A1 CA3145663A1 CA3145663A CA3145663A CA3145663A1 CA 3145663 A1 CA3145663 A1 CA 3145663A1 CA 3145663 A CA3145663 A CA 3145663A CA 3145663 A CA3145663 A CA 3145663A CA 3145663 A1 CA3145663 A1 CA 3145663A1
- Authority
- CA
- Canada
- Prior art keywords
- pile
- centralizer
- auger
- pile cap
- diameter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000010006 flight Effects 0.000 claims abstract description 19
- 238000005553 drilling Methods 0.000 claims abstract description 11
- 238000009966 trimming Methods 0.000 claims abstract description 6
- 230000007704 transition Effects 0.000 claims abstract 3
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 2
- 230000014759 maintenance of location Effects 0.000 abstract 1
- 238000005520 cutting process Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000009415 formwork Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000033001 locomotion Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/44—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts
Abstract
An attachment for a rotary pile rig comprising of a quick connection shaft as the drill stem, tapered-helical flights that reduce in diameter at a steep angle to terminate at a smaller diameter, a centralizer fixed to the drill stem below the flighting, and a drill tip terminating a distance below the centralizer. The centralizer is inserted into a pre-bored pile preventing the auger from oscillating offline during drilling operations. As the rotary drill rig applies pressure and torque, the tapered-helical flights ream the top of the pre-bored pile shaft to a larger diameter. The sharp angle of the flights produce a steeply sloped transition between the larger pile cap diameter and smaller pile shaft diameters. The steep shoulder prevents the retention of trimmings from the remainder of the pile installation operations creating an acceptable concreting surface at a determined depth below grade.
Description
Pile Cap Auger Field of the Invention This invention pertains generally to the installation of drilled concrete piles. More specifically the invention is a unique attachment for a rotary pile rig (RPR) that increases the diameter of the top portion of a vertically drilled pile to accept subsequent structural elements such as beams or columns; commonly referred to as a pile cap. The auger includes helical flights that match the pile cap dimension, reducing in diameter at a steep angle, terminating at or below the bored pile diameter. The auger is further provided with a centralizer to prevent offline oscillation of the auger during drilling operations.
The invention possesses numerous benefits and advantages over current practices. In particular, the invention utilizes an overbore principle to create an expanded opening deeper than frost level eliminating multiple steps in the traditional foundation construction process, thereby affording user cost and time reductions.
Moreover, the centralizer is interchangeable and, therefore, allows for the same auger to be used on a variety of pile diameters. The centralizer is further provided with openings that direct excess trimming down the pre-bored pile shaft, reducing binding and buildup. Because of its flexibility across multiple pile shaft diameters, the auger realizes optimized tooling costs.
The auger is further provided with an extended drill stem and drill point.
This allows the tool to be stored in the upright position by inserting the stem into the ground by the RPR. This allows for quick changes between attachments and minimum crew disruption.
A practical example of the flexibility possessed by the invention resides in its ability to eliminate steps from the sequence of construction. The practice of installing foundations with pile caps is split into multiple steps. A rotary pile rig (RPR) drills piles of a prescribed diameter and length into the ground. The hole is reinforced with steel rebar and filled to near the surface with concrete. Subsequently, a different team excavates below the completed pile.
Next a third team installs void form, concrete formwork, pours the pile cap, and removes the formwork. Finally, the second team returns to backfill the completed foundation pile cap.
The configuration of the Pile Cap Auger eliminates these steps through drilling below the frost depth, eliminating debris build up with a steep shoulder cut, while using the pile shaft as a vertical guide to maintain verticality specifications.
Description Of Prior Art It is known in the prior act to provide an auger for a RPR that provides a single diameter pile shaft from top to bottom. U.S. Patent Number 431,455A, which issued to W.
Bagleston on July 1, 1890, discloses an earth auger with means to reduce friction on the cutting element. The auger is the earliest known example of a single diameter auger.
Date Recue/Date Received 2022-01-13 Similarly, U.S. Patent Number 2221680A to Parrish, Jay, dated November 12, 1940, establishes an earth boring auger with cutting flights along its length to improve the accuracy of the shaft location and clean cut holes of maximum diameter for an auger of given outside diameter.
U.S. Patent Number 3311179A to John A Meredith, dated March 28, 1964, introduces the notion of a reamer to increase the size of a drilled caisson. Adapted for the purposes of drilling holes in earth structures of sufficient diameter and depth to receive intercontinental ballistic missile launch facilities. Meredith's invention pertains to very large openings and high-torque operations that take extended periods of time to complete. This invention addresses small diameter openings and quick production movements where multiple openings are completed each day.
U.S. Patent Number 9376880B2 issued to Andreas Stimpfle-Ziegler and assigned to Bauer Maschinen GmbH, introduces a progressive flight pattern in a double helix for the purposes of drilling into hard rock and capturing the cuttings above the auger in a container. This device is not intended to increase the size of a pilot pile or for the purposes of pile caps. Rather, its purpose is to create a bore hole in the ground in a single operation.
Canadian Patent Number 2620166X issued to Boyles Bros. Drilling (Eastern) Ltd., Port Arthur, Ontario, Canada introduces an underreamer. The purpose of the underreamer is to expand the pilot shaft diameter at the founding elevation of the pile into a bell shape.
The underreamer cannot function at the top of the pile or to produce a pile cap.
United States Patent Number 1488525A issued to Lewis C Bayles, April 1, 1924, introduces a centralizer for the purposes of horizontal rock drilling, common in underground mining. The centralizer rests on the bottom of the horizontally drilled hole and allows the drill bit to maintain its horizontal alignment. The centralizer binds against the outer diameter of the pre-bored hole.
Finally, United States Patent Number 10030501B2 issued to Aaron W. Logan, Justin C. Logan, And Patrick R. Derkacz, July 24, 2018, introduces a centralizer for deep hydrocarbon drilling operations. The drill stem passes through the centralizer, supporting a down-hole probe, and is then abandoned in the drilled hole when operations are complete. This inventions centralizer is fixed to the drill stem, is recovered after each use, and is interchangeable to match the bored diameter of the pile shaft.
It is apparent from the foregoing that the prior art fails to address expanding the top of a drilled pile to incorporate a pile cap of a larger diameter within the same operation.
Summary Of the Invention The invention pertains to a quick-change auger which is provided with a drill stem, helical flights that concentrically reduce in diameter from a large atop to a smaller diameter at the flight termination point. Founded at the termination of the helical flights is an interchangeable centralizer with internal channels to shed trimmings and reduce binding. Below the centralizer is the remainder of the drill stem terminating into a drill tip allowing the tool to be stored in the upright position.
The auger is flexible across different brands and sizes of RPR. The kelly box at the top of the drill stem can be adapted to various kelly bar drive sizes.
Date Recue/Date Received 2022-01-13 The steel helical fighting is connected to the drill stem through welded fabrication allowing for flexibility of application. Flights are matched to the diameter of the pile cap, the required pitch of the side slope, the pilot hole diameter, and the material being drilled to meet a range of engineering requirements in different geographies.
The centralizer is a round steel section with internal bracing and a port for mechanically connecting to the drill stem. The centralizer matches the pre-bored hole diameter to ensure the drilling of the pile cap portion of the foundation is vertically aligned with the pile shaft. The centralizers internal bracing is configured to allow excess trimming to fall through channels into the depth of the pre-bored hole reducing binding potential. The configuration of the centralizer allows for a pin to be removed and itself replaced with a centralizer of a different diameter.
Brief Description Of The Drawings = FIG. 1 is a front plan view of the Pile Cap Auger invention The Embodiments Of The Invention In Which An Exclusive Property Or Privilege Is Claimed Are Defined As Follows:
1. A rotary pile rig auger attachment with an elongated stem having a tapered helical flight pattern, said flights begin at the top of the auger below the kelly box attachment point and match the pile cap diameter prescribed by the engineer, said flights terminate at a diameter equal to or less than the pre-bore pile diameter, said flights are guided by an interchangeable centralizer, said centralizer is defined by a round steel section with internal bracing and a inner tube to receive the drill stem, said centralizer has internal channels to shed trimmings and a horizontal port such that a mechanical connection to join the centralizer to the stem/auger assembly allows for manual removal, the drill stem extending below the centralizer terminating into a drill tip so the rotary pile rig can drill it into the ground to store it safely in the upright position while not in use.
The invention possesses numerous benefits and advantages over current practices. In particular, the invention utilizes an overbore principle to create an expanded opening deeper than frost level eliminating multiple steps in the traditional foundation construction process, thereby affording user cost and time reductions.
Moreover, the centralizer is interchangeable and, therefore, allows for the same auger to be used on a variety of pile diameters. The centralizer is further provided with openings that direct excess trimming down the pre-bored pile shaft, reducing binding and buildup. Because of its flexibility across multiple pile shaft diameters, the auger realizes optimized tooling costs.
The auger is further provided with an extended drill stem and drill point.
This allows the tool to be stored in the upright position by inserting the stem into the ground by the RPR. This allows for quick changes between attachments and minimum crew disruption.
A practical example of the flexibility possessed by the invention resides in its ability to eliminate steps from the sequence of construction. The practice of installing foundations with pile caps is split into multiple steps. A rotary pile rig (RPR) drills piles of a prescribed diameter and length into the ground. The hole is reinforced with steel rebar and filled to near the surface with concrete. Subsequently, a different team excavates below the completed pile.
Next a third team installs void form, concrete formwork, pours the pile cap, and removes the formwork. Finally, the second team returns to backfill the completed foundation pile cap.
The configuration of the Pile Cap Auger eliminates these steps through drilling below the frost depth, eliminating debris build up with a steep shoulder cut, while using the pile shaft as a vertical guide to maintain verticality specifications.
Description Of Prior Art It is known in the prior act to provide an auger for a RPR that provides a single diameter pile shaft from top to bottom. U.S. Patent Number 431,455A, which issued to W.
Bagleston on July 1, 1890, discloses an earth auger with means to reduce friction on the cutting element. The auger is the earliest known example of a single diameter auger.
Date Recue/Date Received 2022-01-13 Similarly, U.S. Patent Number 2221680A to Parrish, Jay, dated November 12, 1940, establishes an earth boring auger with cutting flights along its length to improve the accuracy of the shaft location and clean cut holes of maximum diameter for an auger of given outside diameter.
U.S. Patent Number 3311179A to John A Meredith, dated March 28, 1964, introduces the notion of a reamer to increase the size of a drilled caisson. Adapted for the purposes of drilling holes in earth structures of sufficient diameter and depth to receive intercontinental ballistic missile launch facilities. Meredith's invention pertains to very large openings and high-torque operations that take extended periods of time to complete. This invention addresses small diameter openings and quick production movements where multiple openings are completed each day.
U.S. Patent Number 9376880B2 issued to Andreas Stimpfle-Ziegler and assigned to Bauer Maschinen GmbH, introduces a progressive flight pattern in a double helix for the purposes of drilling into hard rock and capturing the cuttings above the auger in a container. This device is not intended to increase the size of a pilot pile or for the purposes of pile caps. Rather, its purpose is to create a bore hole in the ground in a single operation.
Canadian Patent Number 2620166X issued to Boyles Bros. Drilling (Eastern) Ltd., Port Arthur, Ontario, Canada introduces an underreamer. The purpose of the underreamer is to expand the pilot shaft diameter at the founding elevation of the pile into a bell shape.
The underreamer cannot function at the top of the pile or to produce a pile cap.
United States Patent Number 1488525A issued to Lewis C Bayles, April 1, 1924, introduces a centralizer for the purposes of horizontal rock drilling, common in underground mining. The centralizer rests on the bottom of the horizontally drilled hole and allows the drill bit to maintain its horizontal alignment. The centralizer binds against the outer diameter of the pre-bored hole.
Finally, United States Patent Number 10030501B2 issued to Aaron W. Logan, Justin C. Logan, And Patrick R. Derkacz, July 24, 2018, introduces a centralizer for deep hydrocarbon drilling operations. The drill stem passes through the centralizer, supporting a down-hole probe, and is then abandoned in the drilled hole when operations are complete. This inventions centralizer is fixed to the drill stem, is recovered after each use, and is interchangeable to match the bored diameter of the pile shaft.
It is apparent from the foregoing that the prior art fails to address expanding the top of a drilled pile to incorporate a pile cap of a larger diameter within the same operation.
Summary Of the Invention The invention pertains to a quick-change auger which is provided with a drill stem, helical flights that concentrically reduce in diameter from a large atop to a smaller diameter at the flight termination point. Founded at the termination of the helical flights is an interchangeable centralizer with internal channels to shed trimmings and reduce binding. Below the centralizer is the remainder of the drill stem terminating into a drill tip allowing the tool to be stored in the upright position.
The auger is flexible across different brands and sizes of RPR. The kelly box at the top of the drill stem can be adapted to various kelly bar drive sizes.
Date Recue/Date Received 2022-01-13 The steel helical fighting is connected to the drill stem through welded fabrication allowing for flexibility of application. Flights are matched to the diameter of the pile cap, the required pitch of the side slope, the pilot hole diameter, and the material being drilled to meet a range of engineering requirements in different geographies.
The centralizer is a round steel section with internal bracing and a port for mechanically connecting to the drill stem. The centralizer matches the pre-bored hole diameter to ensure the drilling of the pile cap portion of the foundation is vertically aligned with the pile shaft. The centralizers internal bracing is configured to allow excess trimming to fall through channels into the depth of the pre-bored hole reducing binding potential. The configuration of the centralizer allows for a pin to be removed and itself replaced with a centralizer of a different diameter.
Brief Description Of The Drawings = FIG. 1 is a front plan view of the Pile Cap Auger invention The Embodiments Of The Invention In Which An Exclusive Property Or Privilege Is Claimed Are Defined As Follows:
1. A rotary pile rig auger attachment with an elongated stem having a tapered helical flight pattern, said flights begin at the top of the auger below the kelly box attachment point and match the pile cap diameter prescribed by the engineer, said flights terminate at a diameter equal to or less than the pre-bore pile diameter, said flights are guided by an interchangeable centralizer, said centralizer is defined by a round steel section with internal bracing and a inner tube to receive the drill stem, said centralizer has internal channels to shed trimmings and a horizontal port such that a mechanical connection to join the centralizer to the stem/auger assembly allows for manual removal, the drill stem extending below the centralizer terminating into a drill tip so the rotary pile rig can drill it into the ground to store it safely in the upright position while not in use.
2. The pile cap auger recited in claim 1 is fabricated from steel materials
3. The pile cap auger recited in claim 1 wherein said drill stem utilizes a kelly box attachment at the top to accommodate various RPR manufacturers and kelly bar sizes
4. The pile cap auger recited in claim 1 wherein said helical flights are attached to the drill stem by welded fabrication
5. The pile cap auger helical flights recited in claim 4 wherein said helical flights match the desired pile cap at their largest diameter at the top
6. The pile cap auger helical flights recited in claim 4 wherein said helical flights taper in diameter at a sufficient angle to create a finished should in the excavated hole that will shed dirt and debris to form an acceptable surface for concreting
7. The pile cap auger flights recited in claim 4 wherein said helical flights terminate at a dimension matching or less than the prescribed pile shaft diameter Date Recue/Date Received 2022-01-13
Claims
The steel helical flighting is connected to the drill stem through welded fabrication allowing for flexibility of application. Flights are matched to the diameter of the pile cap, the required pitch of the side slope, the pilot hole diameter, and the material being drilled to meet a range of engineering requirements in different geographies.
The centralizer is a round steel section with internal bracing and a port for mechanically connecting to the drill stem. The centralizer matches the pre-bored hole diameter to ensure the drilling of the pile cap portion of the foundation is vertically aligned with the pile shaft. The centralizers internal bracing is configured to allow excess trimming to fall through channels into the depth of the pre-bored hole reducing binding potential. The configuration of the centralizer allows for a pin to be removed and itself replaced with a centralizer of a different diameter.
8. The pile cap auger recited in claim 1 wherein said centralizer maintains verticality of foundation elements 9. The pile cap auger recited in claim 1 wherein said centralizer can be changed to one of a different diameter to allow for quick transition between a variety of pre-bored pile shaft sizes. For example, the RPR is addressing a foundation with a pile size of 24"
and a pile cap of 36". The RPR completes the initial foundation and moves to the next one which is has a different pile shaft specification; configured with a pile shaft size of 30" and a pile cap of 36". The RPR switches the centralizer from a 24" to a 30" allowing the same tool to be used for both foundations.
10. The pile cap auger recited in claim 1 wherein the portion of drill stem extending below the centralizer acts as a vertical storage aid when drilled into the ground 11. The pile cap auger recited in claim 1 wherein the drill stem terminates into a drill tip 12. The pile cap auger recited in claim 1 wherein the tool expands the top portion of a pile foundation to incorporate the pile cap into foundation drilling operations 13. The pile cap auger recited in claim 1 wherein the tool allows for the shoulder of the transition between the pile shaft and the pile cap to be drilled to any selected depth thus eliminating the need for frost protection 14. The pile cap auger recited in claim 1 wherein the tool expands the pre-bore pile shaft diameter starting at the top along its vertical length 15. The pile cap auger recited in claim 1 that is flexible across multiple pre-bore shaft diameters Date Recue/Date Received 2022-01-13
The centralizer is a round steel section with internal bracing and a port for mechanically connecting to the drill stem. The centralizer matches the pre-bored hole diameter to ensure the drilling of the pile cap portion of the foundation is vertically aligned with the pile shaft. The centralizers internal bracing is configured to allow excess trimming to fall through channels into the depth of the pre-bored hole reducing binding potential. The configuration of the centralizer allows for a pin to be removed and itself replaced with a centralizer of a different diameter.
8. The pile cap auger recited in claim 1 wherein said centralizer maintains verticality of foundation elements 9. The pile cap auger recited in claim 1 wherein said centralizer can be changed to one of a different diameter to allow for quick transition between a variety of pre-bored pile shaft sizes. For example, the RPR is addressing a foundation with a pile size of 24"
and a pile cap of 36". The RPR completes the initial foundation and moves to the next one which is has a different pile shaft specification; configured with a pile shaft size of 30" and a pile cap of 36". The RPR switches the centralizer from a 24" to a 30" allowing the same tool to be used for both foundations.
10. The pile cap auger recited in claim 1 wherein the portion of drill stem extending below the centralizer acts as a vertical storage aid when drilled into the ground 11. The pile cap auger recited in claim 1 wherein the drill stem terminates into a drill tip 12. The pile cap auger recited in claim 1 wherein the tool expands the top portion of a pile foundation to incorporate the pile cap into foundation drilling operations 13. The pile cap auger recited in claim 1 wherein the tool allows for the shoulder of the transition between the pile shaft and the pile cap to be drilled to any selected depth thus eliminating the need for frost protection 14. The pile cap auger recited in claim 1 wherein the tool expands the pre-bore pile shaft diameter starting at the top along its vertical length 15. The pile cap auger recited in claim 1 that is flexible across multiple pre-bore shaft diameters Date Recue/Date Received 2022-01-13
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA3145663A CA3145663A1 (en) | 2022-01-13 | 2022-01-13 | Pile cap auger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA3145663A CA3145663A1 (en) | 2022-01-13 | 2022-01-13 | Pile cap auger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA3145663A1 true CA3145663A1 (en) | 2023-07-13 |
Family
ID=87143090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA3145663A Pending CA3145663A1 (en) | 2022-01-13 | 2022-01-13 | Pile cap auger |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA3145663A1 (en) |
-
2022
- 2022-01-13 CA CA3145663A patent/CA3145663A1/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2007527493A (en) | Geothermal exchanger configuration method | |
| CN102912791B (en) | Construction method of bored pile | |
| CN211737051U (en) | Deviation-preventing rotary drilling bit and rotary drilling rig | |
| US6120214A (en) | Process for constructing reinforced subterranean columns | |
| US9469959B2 (en) | Full displacement pile tip and method for use | |
| CN110529047A (en) | A kind of self-advancing type pipe canopy drilling tool excavated for tunnel soft rock | |
| AU2007293634B2 (en) | Method for drilling rock | |
| CN105019431B (en) | Crush and complete alternate steep dip stratified rock masses Large Diameter Super-long Bored Piles construction method | |
| EP2581498B1 (en) | Method of making large diameter piles in a ground and tool for carrying out said operation | |
| KR101861120B1 (en) | Structure members for reinforcing footing and reinforcement method using the same | |
| CN103161163A (en) | Prestressed tubular pile for spinning rock drilling and embedding rock socketing | |
| Heath | Drilled pile foundations in porous, pinnacled carbonate rock | |
| CA3145663A1 (en) | Pile cap auger | |
| JP4074198B2 (en) | How to remove existing piles | |
| US3382934A (en) | Downhole drill for submarine drilling | |
| CN220621760U (en) | Guiding positioning rotary drill cylinder | |
| JPH04302693A (en) | Excavating engineering method | |
| CN111945731A (en) | Single steel bar rotary core drilling machine for shield interval limit-invading pile foundation and processing construction method | |
| KR100731573B1 (en) | Carrier construction method of double track tunnel | |
| RU2786081C1 (en) | Method for installation of screw pile in permafrost soils and helical screw for implementation of method | |
| EP0437262B2 (en) | Method for preventive consolidation of the soil for underground minings | |
| RU2328575C1 (en) | Bored auger pile installation device | |
| RU2719875C1 (en) | Assembly of drill string bottom for drilling of offshoots from horizontal part of uncased well | |
| JP2002047877A (en) | Consolidation bit for impact type excavating method, and burying method for underground buried object using the same | |
| KR101561616B1 (en) | Tunnel driving method |