CN107893674B - Self-drilling hollow grouting anchor rod suitable for large-scale rock mass structural system - Google Patents
Self-drilling hollow grouting anchor rod suitable for large-scale rock mass structural system Download PDFInfo
- Publication number
- CN107893674B CN107893674B CN201711296947.1A CN201711296947A CN107893674B CN 107893674 B CN107893674 B CN 107893674B CN 201711296947 A CN201711296947 A CN 201711296947A CN 107893674 B CN107893674 B CN 107893674B
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- CN
- China
- Prior art keywords
- hollow
- transmission shaft
- rod body
- drill bit
- drilling
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- 238000005553 drilling Methods 0.000 title claims abstract description 35
- 239000011435 rock Substances 0.000 title claims abstract description 21
- 230000005540 biological transmission Effects 0.000 claims abstract description 37
- 238000000034 method Methods 0.000 claims abstract description 15
- 230000007246 mechanism Effects 0.000 claims abstract description 11
- 239000011440 grout Substances 0.000 claims abstract description 10
- 230000008569 process Effects 0.000 claims abstract description 10
- 239000002893 slag Substances 0.000 claims abstract description 10
- 230000001174 ascending effect Effects 0.000 claims abstract description 8
- 238000007599 discharging Methods 0.000 claims abstract description 6
- 238000005520 cutting process Methods 0.000 claims description 5
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims description 2
- 239000000284 extract Substances 0.000 claims 1
- 239000007788 liquid Substances 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 5
- 238000004873 anchoring Methods 0.000 abstract description 4
- 230000010354 integration Effects 0.000 abstract description 3
- 239000002689 soil Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/42—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
- E21B10/43—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits characterised by the arrangement of teeth or other cutting elements
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/003—Machines for drilling anchor holes and setting anchor bolts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a self-drilling hollow grouting anchor rod suitable for a large rock mass structural system, which comprises a hollow rod body, a hollow drill bit, a transmission shaft, an arc-shaped blade, a slag discharging channel, a unidirectional rotating mechanism, a spiral ascending wide thread, a connecting piece, a nut, a backing plate, a grout stop plug, a pawl, a ratchet wheel and other parts, wherein the outer surface of the hollow rod body is provided with threads with a certain interval, the lower end of the hollow rod body is connected with the hollow drill bit through the connecting piece, the central position of the hollow drill bit is connected with the transmission shaft through the unidirectional rotating mechanism, the transmission shaft is positioned in the hollow rod body, and the nut is installed at the upper end of the hollow rod body through the threads on the outer surface of the hollow rod body. The invention can realize the integration of drilling, chip removal and anchor rod placement by self-drilling of the hollow grouting anchor rod, simplifies the construction process, effectively improves the construction efficiency and the anchoring effect compared with the traditional hollow grouting anchor rod, and particularly greatly reduces the cost when a large-scale rock mass structural system is involved.
Description
Technical Field
The invention relates to an anchor rod, in particular to a self-drilling hollow grouting anchor rod suitable for a large-scale rock mass structural system.
Background
The anchor rod is used as a rod system structure for improving the stability of a rock-soil body, and is widely applied to projects such as tunnels, underground caverns, slopes and the like due to the advantages of simple structure, economy and high efficiency. Among them, hollow grouting anchor rods are gaining importance due to the advantages of reliable quality, superior anchoring effect, good durability, strong corrosion resistance and the like.
With the rapid development of hollow grouting anchor rods, construction quality and construction speed are gradually important points of concern. The traditional construction method requires three procedures: firstly, drilling holes, then putting anchor rods, finally grouting, and making the construction process more complex; in addition, the construction speed of drilling and then placing the anchor rod is low, and particularly, the cost is high when a large-scale rock mass structural system is involved.
Disclosure of Invention
The invention aims to provide a self-drilling hollow grouting anchor rod suitable for a large-scale rock mass structural system, so as to solve the problems in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the utility model provides a self-drilling cavity grout stock suitable for large-scale structural system of rock mass, includes the cavity body of rod, cavity drill bit, transmission shaft, arc cutting edge, slag discharge channel, unidirectional rotating mechanism, spiral ascending wide screw thread, connecting piece, nut, backing plate, stop slip stopper, pawl, ratchet, annular groove and bulge loop, the cavity body of rod surface is equipped with the screw thread of certain interval, is connected with the cavity drill bit through the connecting piece in the cavity body of rod lower extreme, is connected with the transmission shaft through unidirectional rotating mechanism in the central point of cavity drill bit, the transmission shaft is located the inside of cavity body of rod, installs the nut through the screw thread of cavity body of rod surface in the upper end of cavity body of rod, is equipped with the stop slip stopper in the below of nut, installs the backing plate between stop slip stopper and nut; the hollow drill bit is made of alloy steel to ensure the rigidity and toughness, and comprises two groups of inward arc-shaped cutting edges, a slag discharging channel and a pawl connected with a ratchet wheel at the lower end of the transmission shaft, and the pawl and the ratchet wheel form a unidirectional rotation mechanism together; the outside of the transmission shaft is welded with a spiral ascending wide thread, and the upper end of the transmission shaft is provided with a joint synchronously linked with the drilling machine.
As a further scheme of the invention: the inner space of the hollow rod body is not only a chip removal channel but also a grouting channel; and channels are provided for chip removal in the self-drilling process among the hollow rod body, the hollow drill bit and the spiral ascending wide threads outside the transmission shaft.
As still further aspects of the invention: the diameter of the hollow drill bit is 20mm larger than that of the hollow rod body.
As still further aspects of the invention: the two groups of arc-shaped blades of the hollow drill bit are bent inwards to ensure that the cut rock, soil and scraps enter the slag discharge channel.
As still further aspects of the invention: the lower end of the hollow rod body is provided with an annular groove, the annular groove is in clearance fit with a convex ring at the upper end of the hollow drill bit, and the annular groove and the convex ring jointly form a connecting piece.
As still further aspects of the invention: the pawl at the upper end of the hollow drill bit is meshed with the ratchet wheel at the lower end of the transmission shaft, so that the self-drilling process can be guaranteed to be smoothly carried out when the hollow drill bit rotates clockwise, the hollow drill bit is separated from the transmission shaft when the hollow drill bit rotates anticlockwise, and the transmission shaft can be guaranteed to be smoothly taken out from the hollow rod body.
Compared with the prior art, the invention has the beneficial effects that:
the invention can realize the integration of drilling, chip removal and anchor rod placement by self-drilling of the hollow grouting anchor rod, simplifies the construction process, effectively improves the construction efficiency and the anchoring effect compared with the traditional hollow grouting anchor rod, and particularly greatly reduces the cost when a large-scale rock mass structural system is involved.
Drawings
Fig. 1 is a schematic structural view of a self-drilling hollow grouting bolt suitable for use in a large structural system of rock mass.
Fig. 2 is a top view of a hollow drill bit in a self-drilling hollow grouting bolt suitable for use in a large structural system of rock mass.
Fig. 3 is a schematic diagram of the connection of a hollow drill bit and a drive shaft in a self-drilling hollow grouting bolt suitable for use in a large-scale structural system of rock mass.
Fig. 4 is a schematic structural view of a hollow rod body and hollow drill bit connection in a self-drilling hollow grouting anchor suitable for a large-scale rock mass structural system.
Fig. 5 is a schematic illustration of the operation of a self drilling hollow grouting bolt suitable for use in a large structural system of rock mass.
Fig. 6 is a construction effect diagram of a self-drilling hollow grouting bolt suitable for a large-scale structural system of a rock mass.
In the figure: the hollow rod body 1, the hollow drill bit 2, the transmission shaft 3, the arc-shaped cutting edge 4, the slag discharging channel 5, the unidirectional rotation mechanism 6, the spiral ascending wide thread 7, the connecting piece 8, the nut 9, the backing plate 10, the grout stop 11, the pawl 61, the ratchet wheel 62, the annular groove 81 and the convex ring 82.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1 to 6, in the embodiment of the invention, a self-drilling hollow grouting anchor rod suitable for a large-scale rock mass structure system comprises a hollow rod body 1, a hollow drill bit 2, a transmission shaft 3, an arc-shaped blade 4, a slag discharging channel 5, a unidirectional rotating mechanism 6, a spiral ascending wide thread 7, a connecting piece 8, a nut 9, a backing plate 10, a grout stop 11, a pawl 61, a ratchet wheel 62, an annular groove 81 and a convex ring 82, wherein the outer surface of the hollow rod body 1 is provided with threads with a certain interval, the lower end of the hollow rod body 1 is connected with the hollow drill bit 2 through the connecting piece 8, the central position of the hollow drill bit 2 is connected with the transmission shaft 3 through the unidirectional rotating mechanism 6, the transmission shaft 3 is positioned in the hollow rod body 1, the upper end of the hollow rod body 1 is provided with the nut 9 through the threads on the outer surface of the hollow rod body 1, the grout stop 11 is arranged below the nut 9, and the backing plate 10 is arranged between the grout stop 11 and the nut 9; the hollow drill bit 2 is made of alloy steel to ensure the rigidity and toughness, the hollow drill bit 2 comprises two groups of inward arc-shaped cutting edges 4, a slag discharging channel 5 and a pawl 61 connected with a ratchet wheel 62 at the lower end of the transmission shaft 3, and the pawl 61 and the ratchet wheel 62 jointly form a unidirectional rotation mechanism 6; the outside of the transmission shaft 3 is welded with a spiral rising wide thread 7, and the upper end of the transmission shaft 3 is provided with a joint synchronously linked with the drilling machine.
The inner space of the hollow rod body 1 is not only a chip removal channel but also a grouting channel; the hollow rod body 1, the hollow drill bit 2 and the spiral ascending wide threads 7 outside the transmission shaft 3 provide channels for chip removal in the self-drilling process.
The diameter of the hollow drill bit 2 is 20mm larger than the diameter of the hollow rod body 1.
The two groups of arc-shaped blades 4 of the hollow drill bit 2 are bent inwards to ensure that the cut rock and soil scraps enter the slag discharge channel.
The lower end of the hollow rod body 1 is provided with an annular groove 81, the annular groove 81 is in clearance fit with a convex ring 82 at the upper end of the hollow drill bit 2, and the annular groove 81 and the convex ring 82 jointly form a connecting piece 8.
The pawl 61 at the upper end of the hollow drill bit 2 is meshed with the ratchet 62 at the lower end of the transmission shaft 3, so that the self-drilling process can be ensured to be smoothly carried out when the hollow drill bit rotates clockwise, the hollow drill bit 2 is separated from the transmission shaft 3 when the hollow drill bit rotates anticlockwise, and the transmission shaft 3 can be ensured to be smoothly taken out from the hollow rod body 1.
The working principle of the invention is as follows:
the drilling depth of the invention is larger than the design depth, after the drilling is carried out to the preset depth, the transmission shaft is rotated anticlockwise, the transmission shaft is extracted from the hollow rod body, the grout stop plug is arranged, the backing plate is paved, and then grouting is carried out until the nut is fully screwed for fixation.
The invention makes the hollow grouting anchor rod self-drilling, realizes the integration of drilling, chip removal and anchor rod placement, simplifies the construction process, effectively improves the construction efficiency and the anchoring effect, and particularly greatly reduces the cost when relating to a large-scale rock mass structural system.
Although the present invention has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present invention.
Claims (4)
1. The use method of the self-drilling hollow grouting anchor rod suitable for a large-scale rock mass structure system is characterized in that the outer surface of the hollow rod body (1) is provided with threads with a certain interval, the lower end of the hollow rod body (1) is connected with the hollow drill bit (2) through a connecting piece (8), the central position of the hollow drill bit (2) is connected with the transmission shaft (3) through the unidirectional rotating mechanism (6), the transmission shaft (3) is positioned in the hollow rod body (1), a nut (9) is arranged at the upper end of the hollow rod body (1) through threads on the outer surface of the hollow rod body (1), a grout stop plug (11) is arranged below the nut (9), and the grout stop plug (11) and the nut (9) are arranged between the grout stop plug (11) and the nut (9); the hollow drill bit (2) is made of alloy steel to ensure rigidity and toughness, the hollow drill bit (2) comprises two groups of inward arc-shaped blades (4), a slag discharging channel (5) and a pawl (61) connected with a ratchet wheel (62) at the lower end of the transmission shaft (3), and the pawl (61) and the ratchet wheel (62) form a unidirectional rotation mechanism (6); the outside of the transmission shaft (3) is welded with a spiral rising wide thread (7), and the upper end of the transmission shaft (3) is provided with a joint synchronously linked with the drilling machine;
the inner space of the hollow rod body (1) is not only a chip removal channel but also a grouting channel; the hollow rod body (1), the hollow drill bit (2) and the spiral ascending wide threads (7) outside the transmission shaft (3) provide channels for chip removal in the self-drilling process;
the diameter of the hollow drill bit (2) is 20mm larger than that of the hollow rod body (1);
the using method of the self-drilling hollow grouting anchor rod comprises the following steps: drilling depth is greater than design depth, drills to preset depth back, anticlockwise rotation transmission shaft (3), extracts transmission shaft (3) from hollow body of rod (1), installs and ends thick liquid stopper (11), lays backing plate (10), then grouting is full, and screw up nut (9) fixed.
2. The use according to claim 1, characterized in that the two sets of curved blades (4) of the hollow drill (2) are curved inwards to ensure that the cut rock and earth cuttings enter the slag discharge channel.
3. The use method according to claim 1, characterized in that the lower end of the hollow rod body (1) is provided with an annular groove (81), the annular groove (81) is in clearance fit with a convex ring (82) at the upper end of the hollow drill bit (2), and the annular groove (81) and the convex ring (82) form a connecting piece (8) together.
4. The use method according to claim 1, wherein the pawl (61) at the upper end of the hollow drill bit (2) is meshed with the ratchet wheel (62) at the lower end of the transmission shaft (3), so that the self-drilling process can be smoothly performed during clockwise rotation, and the hollow drill bit (2) is separated from the transmission shaft (3) during anticlockwise rotation and the transmission shaft (3) can be smoothly taken out from the hollow rod body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711296947.1A CN107893674B (en) | 2017-12-08 | 2017-12-08 | Self-drilling hollow grouting anchor rod suitable for large-scale rock mass structural system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711296947.1A CN107893674B (en) | 2017-12-08 | 2017-12-08 | Self-drilling hollow grouting anchor rod suitable for large-scale rock mass structural system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107893674A CN107893674A (en) | 2018-04-10 |
| CN107893674B true CN107893674B (en) | 2023-12-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711296947.1A Active CN107893674B (en) | 2017-12-08 | 2017-12-08 | Self-drilling hollow grouting anchor rod suitable for large-scale rock mass structural system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107893674B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109667269B (en) * | 2018-12-29 | 2021-07-09 | 国网河北省电力有限公司经济技术研究院 | Centrifugal hole cleaning device for cast-in-situ bored pile |
| CN112324323B (en) * | 2020-10-30 | 2023-01-17 | 中航勘察设计研究院有限公司 | Grouting supporting type drilling and anchoring integrated machine and anchoring method |
| CN115014263B (en) * | 2022-08-09 | 2022-11-11 | 湖南鹏翔星通汽车有限公司 | Hole depth measuring assembly based on anchor rod trolley design |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102704969A (en) * | 2012-06-25 | 2012-10-03 | 中国矿业大学 | Recoverable anchor rod for drilling, anchoring and grouting and supporting method thereof |
| CN203248178U (en) * | 2013-05-23 | 2013-10-23 | 贵州盘江精煤股份有限公司火烧铺矿 | Downward-hole self-drilling grouting anchor rod |
| CN203430548U (en) * | 2013-09-02 | 2014-02-12 | 晋城宏圣科威矿用材料有限公司 | Recyclable anchor rod |
| CN206267861U (en) * | 2016-11-03 | 2017-06-20 | 山东科技大学 | A kind of hollow grouting anchor with ribbing with the shoe screw thread of automatic chip-removal function |
| CN207526514U (en) * | 2017-12-08 | 2018-06-22 | 吉林大学 | A kind of drilling hollow grouting anchor pole certainly suitable for rock mass large scale structural system |
-
2017
- 2017-12-08 CN CN201711296947.1A patent/CN107893674B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102704969A (en) * | 2012-06-25 | 2012-10-03 | 中国矿业大学 | Recoverable anchor rod for drilling, anchoring and grouting and supporting method thereof |
| CN203248178U (en) * | 2013-05-23 | 2013-10-23 | 贵州盘江精煤股份有限公司火烧铺矿 | Downward-hole self-drilling grouting anchor rod |
| CN203430548U (en) * | 2013-09-02 | 2014-02-12 | 晋城宏圣科威矿用材料有限公司 | Recyclable anchor rod |
| CN206267861U (en) * | 2016-11-03 | 2017-06-20 | 山东科技大学 | A kind of hollow grouting anchor with ribbing with the shoe screw thread of automatic chip-removal function |
| CN207526514U (en) * | 2017-12-08 | 2018-06-22 | 吉林大学 | A kind of drilling hollow grouting anchor pole certainly suitable for rock mass large scale structural system |
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| Publication number | Publication date |
|---|---|
| CN107893674A (en) | 2018-04-10 |
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