CN217813548U - Rod body cutting type large-deformation prestress hydraulic expansion grouting anchor rod - Google Patents
Rod body cutting type large-deformation prestress hydraulic expansion grouting anchor rod Download PDFInfo
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- CN217813548U CN217813548U CN202221159182.3U CN202221159182U CN217813548U CN 217813548 U CN217813548 U CN 217813548U CN 202221159182 U CN202221159182 U CN 202221159182U CN 217813548 U CN217813548 U CN 217813548U
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Abstract
The utility model discloses a body of rod cutting formula large deformation prestressing force water conservancy inflation slip casting stock. The anchor rod comprises an anchoring agent layer, an inner rod body, a middle sleeve, a hydraulic expansion shell and a tray; the inner rod body is a grouting anchor rod; the hydraulic expansion shell is formed by radially bending a steel pipe; one end of the inner rod body is provided with an anchoring agent layer, and the other end of the inner rod body is positioned in the middle sleeve; ribs are arranged on the inner rod body; both ends of the hydraulic expansion shell are welded on the middle sleeve; the water injection hole is arranged on the middle sleeve; the anchoring agent layer and the hydraulic expansion shell are both positioned in the drill hole; interior body of rod, well sleeve one end are located the drilling, and the other end passes through nut and tray to be fixed on the rock mass. The utility model has the advantages of simple structure, convenient to use possesses the body of rod axial and radial prestressing force of exerting simultaneously, functions such as big deformation and slip casting, and the range of application is extensive.
Description
Technical Field
The utility model relates to a ground body anchor technical field specifically indicates a big deformation prestressing force water conservancy inflation slip casting stock of body of rod cutting formula, especially indicates the big deformation stock that can exert body of rod axial and radial prestressing force simultaneously to carry out the slip casting to the country rock and consolidate, when taking place board cracking, rib or rockburst to the country rock, cause tray and country rock surface to take off the air, the stock still has certain supporting effect.
Background
As an active supporting mode, the prestressed anchor rod has the outstanding characteristic of quickly providing supporting force compared with a common bonding anchor rod. By applying active prestress, the stress state of a rock body is favorably improved, the stress concentration degree of surrounding rocks is relieved, cracks in the surrounding rocks are promoted to be closed, and the cracks are restrained from expanding and communicating in time; the prestressed anchor rod applies a supporting force on the surface to the surrounding rock by means of the base plate, certain supporting surrounding pressure is provided for the surrounding rock, and further the damage of the surrounding rock can be effectively inhibited.
Therefore, it is necessary to develop a bolt which has a supporting force when the tray is detached from the surface of the surrounding rock.
Disclosure of Invention
The utility model aims at providing a rod body cutting type large deformation prestress hydraulic expansion grouting anchor rod which has simple structure and convenient use, has the functions of simultaneously applying axial and radial prestress of the rod body, large deformation, grouting and the like, and has wide application range; after the tray and the surrounding rock are separated, the hydraulic expansion shell is expanded and then clings to the hole wall, and a certain friction force is provided, so that the rod body of the rod body cutting type large-deformation prestress hydraulic expansion grouting anchor rod still has a pre-tightening force in the axial direction, and the continuous supporting force is provided for the surrounding rock; the anchor rod overcomes the defects that the existing anchor rod can not apply axial and radial prestress and large deformation and grouting of the rod body at the same time, and simultaneously solves the problem that the anchoring force is invalid after the tray and the surface of the surrounding rock are separated.
In order to realize the purpose, the technical scheme of the utility model is that: the utility model provides a body of rod cutting formula large deformation prestressing force water conservancy inflation slip casting stock which characterized in that: comprises an anchoring agent layer, an inner rod body, a middle sleeve, a hydraulic expansion shell and a tray;
the anchoring agent layer and the hydraulic expansion shell are both positioned in the drill hole;
one end of the middle sleeve is positioned in the drill hole, and the other end of the middle sleeve extends out of the drill hole and is fixed on a rock mass through a nut and a tray;
the inner rod body is a grouting anchor rod;
one end of the inner rod body is fixed at the hole bottom of the drilled hole through the anchoring agent layer, and the other end of the inner rod body penetrates through the middle sleeve; ribs are arranged on the inner rod body; the rib is positioned in the middle sleeve;
the hydraulic expansion shell is formed by radially bending a steel pipe; the hydraulic expansion shell is positioned in the drill hole; the hydraulic expansion shell is sleeved on the periphery of the middle sleeve, and two ends of the hydraulic expansion shell are welded on the middle sleeve;
the water injection hole is arranged on the middle sleeve and communicated with the hydraulic expansion shell.
In the technical scheme, the through hole structure is arranged in the middle sleeve; the through hole structure comprises a first through hole structure, a second through hole structure and a third through hole structure; the first through hole structure, the second through hole structure and the third through hole structure are communicated in sequence; the inner diameter of the third through hole structure is larger than that of the first through hole structure; the second through hole structure is an expanding structure; the inner diameter of one end of the second through hole structure is equal to that of the first through hole structure, and the inner diameter of the other end of the second through hole structure is equal to that of the third through hole structure;
the inner rod body is positioned in the first through hole structure; the ribs are positioned in the second through hole structure and the third through hole structure; the inner diameter of the first through hole structure is larger than or equal to the outer diameter of the inner rod body and smaller than the outer diameter of the rib;
the outer diameter of the rib is smaller than the inner diameter of the second through hole structure and smaller than the inner diameter of the third through hole structure.
In the technical scheme, the hydraulic expansion shell is compressed into a flower shape or a wave shape and then is installed in the drill hole.
In the technical scheme, the damping gasket is arranged between the tray and the rock mass and covers the drill hole;
the outer diameter of the damping washer is larger than the outer diameter of the drill hole.
In the above technical scheme, the grouting holes are formed in the inner rod body.
In the technical scheme, the grouting holes comprise grouting main holes and grouting branch holes;
the grouting main hole is of a through hole structure;
the grouting main hole is arranged inside the inner rod body;
one end of the grouting branch hole is communicated with the grouting main hole, and the other end of the grouting branch hole is arranged on the outer wall of the inner rod body.
In the technical scheme, the grouting main hole penetrates through the inner rod body; the length of the grouting main hole is equal to that of the inner rod body;
the grouting branch holes are arranged in a staggered manner.
The utility model has the advantages of as follows:
(1) The utility model provides anchoring force with the anchoring agent layer (namely, one end of the inner rod body is anchored in the drill hole through the anchoring agent layer), provides axial pretightening force of the rod body through the damping gasket, the tray and the nut, provides radial pretightening force of the rod body through the hydraulic expansion shell after water injection expansion, realizes that the pretightening force is simultaneously applied to the rod body in the axial direction and the radial direction, and realizes the function of large deformation of the anchor rod structure through the relative sliding of the middle sleeve and the inner rod body and the cutting of ribs on the inner rod body; after the tray and the surrounding rock are separated, the hydraulic expansion shell is expanded and then is tightly attached to the hole wall, and certain friction force is provided, so that the axial direction of the rod body cutting type large-deformation prestress hydraulic expansion grouting anchor rod still has pre-tightening force, and continuous supporting force is provided for the surrounding rock; the defects that the existing anchor rod cannot apply axial and radial prestress and large deformation of the rod body at the same time are overcome, and the problem that the anchoring force is invalid after the tray and the surface of the surrounding rock are separated is solved;
(2) After the surrounding rock is deformed, the anchor rod structure in the utility model is elongated, and the ribs are cut off by the middle sleeve in the elongation process; in the cutting process, the whole anchor rod still has prestress, so that continuous supporting force is provided for surrounding rocks, and large deformation is realized;
(3) A large number of cracks can be generated in the large deformation process of the surrounding rock, the surrounding rock is reinforced by grouting through the grouting holes, and the integrity and the bearing capacity of the surrounding rock are improved.
Drawings
Fig. 1 is the utility model discloses the axial structure schematic diagram before the body of rod cutting formula large deformation prestressing force water conservancy inflation slip casting stock water injection inflation.
Fig. 2 is the utility model discloses the radial structure schematic diagram before body of rod cutting formula large deformation prestressing force water conservancy inflation slip casting stock water injection inflation.
Fig. 3 is a schematic view of the connection structure of the middle sleeve, the ribs, the inner rod body and the hydraulic expansion shell according to the present invention.
Fig. 4 is the utility model discloses the axial structure schematic diagram after the big deformation of body of rod cutting formula large deformation prestressing force water conservancy inflation slip casting stock water injection inflation.
Fig. 5 is the utility model discloses the radial structure sketch map after the body of rod cutting formula large deformation prestressing force water conservancy inflation slip casting stock water injection inflation is out of shape greatly.
Fig. 6 is the utility model discloses when the surrounding rock surface takes off the space, the axial structure schematic diagram after the big deformation of body of rod cutting formula large deformation prestressing force water conservancy inflation slip casting stock water injection inflation.
Fig. 7 is the utility model discloses when there is the crack on the country rock surface, and the evacuation, the axial structure sketch map after the body of rod cutting formula large deformation prestressing force water conservancy inflation slip casting stock water injection inflation large deformation.
In fig. 6, B represents the surrounding rock surface void.
In fig. 7, a represents a crack; and B represents the surrounding rock surface void.
In the figure, 1-an anchoring agent layer, 2-an inner rod body, 3-a drilling hole, 4-a middle sleeve, 4.1-a through hole structure, 4.11-a first through hole structure, 4.12-a second through hole structure, 4.13-a third through hole structure, 5-a hydraulic expansion shell, 6-a rock mass, 7-a damping gasket, 8-a nut, 9-a water injection hole, 10-a tray, 11-a rib, 12-water, 13-a grouting hole, 13.1-a main grouting hole and 13.2-a branch grouting hole.
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings, which are not intended to limit the present invention, but are merely exemplary. While the advantages of the invention will be apparent and understood from the description.
The prior publication number is CN113123817, a large-deformation prestressed hydraulic expansion anchor rod is a patent application applied by the applicant of the present application on the 29/04/2021, and the applicant finds in subsequent researches that the patent application with the publication number of CN113123817 integrally fixes the anchor rod in a drill hole through a nut in the working process as an axial fixing force to prevent the anchor rod from falling out of the drill hole; the inner pushing head and the hydraulic expansion inner shell provide axial fixing force simultaneously through friction and deformation of the hydraulic expansion inner shell; after water injection, expansion of the hydraulic expansion shell, deformation of the hydraulic expansion inner shell and pressure of injected water are simultaneously applied to the inner wall of the drill hole to provide radial fixing force; but the end parts of the hydraulic expansion inner shell and the hydraulic expansion outer shell are not bonded with the bottom of the drilled hole, when the tray and the surrounding rock surface are separated, under the condition that the tray and the nut are separated, the anchor rod and the nut have no force application point and the anchoring force is invalid after the tray and the surrounding rock surface are separated. The utility model discloses just in order to solve the problem that tray and country rock surface that publication number CN113123817 exist and take off the back anchor power inefficacy. The utility model fixes the whole anchor rod in the drill hole through the nut, and simultaneously bonds the inner rod at the bottom of the hole through the binder as axial fixing force to prevent the anchor rod from dropping out of the drill hole; after water is injected, under the action of water, the middle sleeve 4 is tightly attached to the inner rod body 2 to provide axial fixing force; after water injection, the hydraulic expansion shell 5 deforms and expands and the pressure of the injected water body is simultaneously applied to the inner wall of the drill hole to provide radial fixing force. The utility model discloses when tray and country rock surface are vacated, under the effect of anchoring agent layer and water, interior rod body 2, well sleeve 4, water conservancy expansion casing 5 form a whole with drilling, even nut 8 is not hard up, and the interior rod body 2, well sleeve 4, water conservancy expansion casing 5 as whole can not become flexible, still have axial, radial force to drilling. Simultaneously, the method can perform grouting reinforcement on cracks generated in the large deformation process of the surrounding rock, and improves the integrity and the bearing capacity of the surrounding rock.
With reference to the accompanying drawings: a rod body cutting type large-deformation prestress hydraulic expansion grouting anchor rod comprises an anchoring agent layer 1, an inner rod body 2, a middle sleeve 4, a hydraulic expansion shell 5 and a tray 10;
the anchoring agent layer 1 and the hydraulic expansion shell 5 are both positioned in the borehole 3;
one end of the middle sleeve 4 is positioned in the drill hole 3, and the other end of the middle sleeve extends out of the drill hole 3 and is fixed on a rock mass 6 through a nut 8 and a tray 10; the axial prestress application of the rod body is completed through the tray 10 and the nut 8, and meanwhile, the axial and radial prestress application of the anchor rod body is realized;
the inner rod body 2 is a grouting anchor rod;
one end of the inner rod body 2 is fixed at the bottom of the drilled hole 3 through the anchoring agent layer 1, and the other end of the inner rod body penetrates through the middle sleeve 4; the inner rod body 2 is provided with ribs 11; the rib 11 is positioned in the middle sleeve 4; one end of an inner rod body 2 is fixed at the bottom end of a hole of a drilling hole 3 through an anchoring agent layer 1, and axial anchoring force is continuously provided before and after surrounding rocks are damaged and when a tray and the surface of the surrounding rocks are separated due to plate cracking, rib spalling and rock burst in a part of roadways;
the hydraulic expansion shell 5 is formed by radially bending a steel pipe, and the purpose is to reduce the diameter of the hydraulic expansion shell 5; the hydraulic expansion shell 5 is sleeved on the periphery of the middle sleeve 4, and two ends of the hydraulic expansion shell are welded on the middle sleeve 4; the hydraulic expansion shell 5 is positioned in the borehole 3; two ends of a steel pipe of the hydraulic expansion shell 5 are welded with the middle sleeve 4, so that the air tightness is ensured; due to the radial expansion of the hydraulically expandable shell 5, the application of a radial prestress of the rod body to the borehole is provided;
the water injection hole 9 is arranged on the middle sleeve 4 and communicated with the hydraulic expansion shell 5; the inner part of the middle sleeve 4 is provided with a water injection hole 9, and external incoming water 12 enters the hydraulic expansion shell 5 through the water injection hole 9;
injecting water into the cavity of the hydraulic expansion shell 5 through the water injection hole 9 to expand the hydraulic expansion shell 5, wherein under the pressure of water 12 in the cavity of the hydraulic expansion shell 5, the outer shell of the hydraulic expansion shell 5 is tightly attached to the wall of the drilled hole, and the inner shell of the hydraulic expansion shell is tightly attached to the inner rod body 2, so that the other end of the inner rod body 2 is fixed at the hole opening end of the drilled hole 3, and meanwhile, radial anchoring force is continuously provided before and after the surrounding rock is damaged and when the tray and the surface of the surrounding rock are separated due to plate cracking, rib spalling and rock burst in a part of roadways;
a through hole structure 4.1 is arranged in the middle sleeve 4; the via structure 4.1 comprises a first via structure 4.11, a second via structure 4.12 and a third via structure 4.13; the first through hole structure 4.11, the second through hole structure 4.12 and the third through hole structure 4.13 are communicated in sequence; the inner diameter of the third through hole structure 4.13 is larger than the inner diameter of the first through hole structure 4.11; the second through hole structure 4.12 is an expanding structure; the inner diameter of one end of the second through hole structure 4.12 is equal to that of the first through hole structure 4.11, and the inner diameter of the other end of the second through hole structure is equal to that of the third through hole structure 4.13;
the inner rod body 2 is positioned in the first through hole structure 4.11; the ribs 11 are located within the second 4.12 and third 4.13 through-hole structures; the inner diameter of the first through hole structure 4.11 is larger than or equal to the outer diameter of the inner rod body 2 and smaller than the outer diameter of the rib 11;
the outer diameter of the ribs 11 is smaller than the inner diameter of the second through-hole arrangement 4.12 and smaller than the inner diameter of the third through-hole arrangement 4.13.
Further, the hydraulically expandable casing 5 is installed in the borehole 3 after being compressed. Water 12 is injected through a water injection port 9, so that the hydraulic expansion shell 5 is expanded and greatly deformed, and radial anchoring force is continuously applied before and after the tray and the surface of the surrounding rock are separated.
Furthermore, the hydraulic expansion shell 5 is installed in the drill hole 3 after being compressed into a flower shape or a wave shape and is sleeved on the periphery of the middle sleeve 4, a round steel pipe is arranged before the hydraulic expansion shell 5 is expanded, and the purpose of compressing into a special shape (such as the flower shape, the wave shape and the like) is to reduce the diameter and conveniently put into the drill hole.
Further, a damping pad 7 is arranged between the pallet 10 and the rock mass 6 and covers the borehole 3;
the outer diameter of the damping gasket 7 is larger than that of the drill hole 3; the application of axial prestress of the rod body is completed through the damping gasket 7, the tray 10 and the nut 8, and meanwhile, the axial prestress and radial prestress application of the anchor rod body is realized.
Further, a grout hole 13 is provided inside the inner rod body 2.
Further, the grouting holes 13 comprise a main grouting hole 13.1 and a branch grouting hole 13.2;
the grouting main hole 13.1 is a through hole structure; the main grouting hole 13.1 is arranged in the inner rod body 2, and grouting reinforcement is carried out on surrounding rocks when needed, so that grouting through the grouting hole has an inhibiting effect on cracking, rib spalling and rock burst of a surrounding rock plate;
two ends of the grouting main hole 13.1 are respectively flush with two ends of the inner rod body 2;
one end of the grouting branch hole 13.2 is communicated with the grouting main hole 13.1, the other end of the grouting branch hole is arranged on the outer wall of the inner rod body 2, grouting slurry sequentially flows into the drill hole 2 through the grouting main hole 13.1 and the grouting branch hole 13.2 to reinforce surrounding rocks and inhibit cracking, rib spalling and rock burst of a surrounding rock slab;
further, a main grouting hole 13.1 penetrates through the inner rod body 2; the length of the grouting main hole 13.1 is equal to that of the inner rod body 2;
grouting branch hole 13.2 has a plurality ofly, and a plurality of grouting branch holes 13.2 are staggered arrangement, improve slip casting efficiency, and cover whole drilling, improve the slip casting effect. Grouting liquid sequentially flows into a gap between the inner rod body 2 and the drilled hole and a surrounding rock crack through the grouting main hole 13.1 and the grouting branch hole 13.2, and the inner rod body 2 and the drilled hole are bonded.
The utility model provides an epoxy glue is chooseed for use on anchoring agent layer for will bond the body of rod and country rock and bond an organic whole.
The utility model relates to a using method of a rod body cutting type large-deformation prestress hydraulic expansion grouting anchor rod, which comprises the following steps,
the method comprises the following steps: installing a rod body cutting type large-deformation prestress hydraulic expansion grouting anchor rod;
the inner rod body 2 is anchored in a rock body 6 through the anchoring agent layer 1, the middle sleeve 4 is fixed on the rock body 6 through the damping gasket 7, the tray 10 and the nut 8, and the axial anchoring force of the rod body cutting type large-deformation prestress hydraulic expansion grouting anchor rod is applied;
water is injected 12 through a water injection port 9, so that the hydraulic expansion shell 5 is expanded and deformed, the outer diameter of the hydraulic expansion shell is enlarged, and the hydraulic expansion shell is tightly attached to the hole wall of the drill hole 3 (the water injection hole is formed in the hole wall of the middle sleeve 4, water 12 is injected into the water injection hole through a high-pressure water injection pump, the water 12 can enter the hydraulic expansion shell 5, the expansion of the hydraulic expansion shell 5 is realized), and the application of the radial anchoring force of the rod body cutting type large-deformation prestress hydraulic expansion grouting anchor rod is realized; so far, the installation of the anchor rod is completed;
step two: supporting by using an anchor rod;
when the surrounding rock is deformed, the rib 11 on the inner rod body is cut through the relative sliding of the middle sleeve 4 and the inner rod body 2, so that the function of large deformation of the anchor rod structure is realized,
when the tray is empty from the surface of the surrounding rock, the inner rod body 2 is fixed in the drilled hole through the anchoring agent layer 1 to provide axial anchoring force, and the axial anchoring force is provided through the friction force generated by the relative movement and deformation of the inner rod body 2 and the middle sleeve 4; radial anchoring force is provided by expansion deformation of the hydraulic expansion shell 5 and close contact between the hydraulic expansion shell 5 and the hole wall of the borehole 3, and radial anchoring force is provided by pressure applied to the hydraulic expansion shell 5 by relative movement and deformation of the inner rod body 2 and the middle sleeve 4; at the moment, the whole sleeve expansion type large-deformation prestress hydraulic expansion anchor rod still has prestress, continuous supporting force is provided for surrounding rocks, and the surrounding rocks are continuously supported through the sleeve expansion type large-deformation prestress hydraulic expansion anchor rod.
As shown in fig. 4, fig. 4 is the state before the cutting, and before the cutting, rib 11 has a lot of, and the whole extension takes place to warp along with the country rock for the body of rod cutting formula large deformation prestressing force water conservancy inflation slip casting stock, and rib 11 on the body is fallen by cutting one by one in the whole extension in-process of stock, and the rib of the body of rod cutting formula large deformation prestressing force water conservancy inflation slip casting stock has reduced after the cutting, and other structures are unchangeable, make when cutting away (promptly the utility model discloses the deformation) including rib 11 on the body of rod the inner rod the utility model discloses adapt to the country rock and warp, continuously provide anchoring force. The large deformation of the structure of the utility model is to adapt to the deformation of the surrounding rock and continuously provide anchoring force; the anchor rod overcomes the defects that the anchor rod in the prior art can not adapt to the deformation of surrounding rocks, and the anchor rod is broken along with the deformation of the surrounding rocks, so that the anchor rod can not play a role in supporting.
When unable prevention country rock takes place board cracking, rib or rockburst, cause tray and country rock surface to come to nothing, because the existence of water conservancy expansion casing 5 and pore wall in close contact with and have the radial anchor power of the body of rod to and the existence of axial anchor power (fix 3 hole bottoms in drilling with 2 one ends of the interior body of rod through anchoring agent layer upon layer 1, around the country rock takes place to destroy and partial tunnel because board cracking, rib and rockburst lead to tray and country rock surface to come to nothing, continuously provide axial anchor power), the stock still has certain supporting role.
In the second step, grouting is carried out according to needs to reinforce the surrounding rock, grouting slurry sequentially flows into a gap between the inner rod body 2 and the drill hole through the grouting main hole 13.1 and the grouting branch hole 13.2, the wall of the inner rod body 2 and the wall of the drill hole 3 are bonded, and meanwhile, cracks generated in the large deformation process of the surrounding rock are blocked, the surrounding rock is reinforced, and the integrity and the bearing capacity of the surrounding rock are improved; when the tray is separated from the surface of the surrounding rock, the anchor rod still has a certain supporting effect due to the fact that the hydraulic expansion shell 5 is in close contact with the hole wall of the drill hole 3 and the radial anchoring force of the rod body exists, and the surrounding rock is continuously supported through the anchor rod.
In order to explain more clearly the utility model discloses a body of rod cutting formula large deformation prestressing force water conservancy inflation slip casting stock compare the advantage that has with prior art, the staff has carried out the contrast with these two kinds of technical scheme, its contrast result is as follows:
by last knowing, for prior art, body of rod cutting formula large deformation prestressing force water conservancy inflation slip casting stock provide the pretightning force through the friction of water conservancy expansion shell with the drilling wall, still can provide three-dimensional stress to the country rock after the country rock is vacated with the tray, can carry out the slip casting simultaneously and consolidate the country rock, the suitability is strong, not only is applicable to general rock mass country rock and struts, still can provide the supporting effect when the country rock takes off with the tray.
Other parts not described belong to the prior art.
Claims (7)
1. A rod body cutting type large-deformation prestress hydraulic expansion grouting anchor rod is characterized in that: comprises an anchoring agent layer (1), an inner rod body (2), a middle sleeve (4), a hydraulic expansion shell (5) and a tray (10);
the anchoring agent layer (1) and the hydraulic expansion shell (5) are both positioned in the drill hole (3);
one end of the middle sleeve (4) is positioned in the drill hole (3), and the other end of the middle sleeve extends out of the drill hole (3) and is fixed on a rock body (6) through a nut (8) and a tray (10);
the inner rod body (2) is a grouting anchor rod;
one end of the inner rod body (2) is fixed at the bottom of the drilled hole (3) through the anchoring agent layer (1), and the other end penetrates through the middle sleeve (4); ribs (11) are arranged on the inner rod body (2); the rib (11) is positioned in the middle sleeve (4);
the hydraulic expansion shell (5) is formed by radially bending a steel pipe; the hydraulic expansion shell (5) is positioned in the drill hole (3); the hydraulic expansion shell (5) is sleeved on the periphery of the middle sleeve (4), and two ends of the hydraulic expansion shell are welded on the middle sleeve (4);
the water injection hole (9) is arranged on the middle sleeve (4) and is communicated with the hydraulic expansion shell (5).
2. The rod body cutting type large-deformation prestress hydraulic expansion grouting anchor rod as claimed in claim 1, wherein: a through hole structure (4.1) is arranged in the middle sleeve (4); the through hole structure (4.1) comprises a first through hole structure (4.11), a second through hole structure (4.12) and a third through hole structure (4.13); the first through hole structure (4.11), the second through hole structure (4.12) and the third through hole structure (4.13) are communicated in sequence; the inner diameter of the third through hole structure (4.13) is larger than that of the first through hole structure (4.11); the second through hole structure (4.12) is an expanding structure; the inner diameter of one end of the second through hole structure (4.12) is equal to that of the first through hole structure (4.11), and the inner diameter of the other end of the second through hole structure is equal to that of the third through hole structure (4.13);
the inner rod body (2) is positioned in the first through hole structure (4.11); the ribs (11) are positioned in the second through hole structure (4.12) and the third through hole structure (4.13); the inner diameter of the first through hole structure (4.11) is larger than or equal to the outer diameter of the inner rod body (2) and smaller than the outer diameter of the rib (11);
the outer diameter of the rib (11) is smaller than the inner diameter of the second through hole structure (4.12).
3. The cutting type large-deformation prestressed hydraulic expansion grouting anchor rod as claimed in claim 2, wherein: the hydraulic expansion shell (5) is compressed into a flower shape or a wave shape, is arranged in the drill hole (3) and is sleeved on the periphery of the middle sleeve (4).
4. The cutting type large-deformation prestressed hydraulic expansion grouting anchor rod as claimed in claim 3, wherein: the damping gasket (7) is arranged between the tray (10) and the rock body (6) and covers the drill hole (3);
the outer diameter of the damping gasket (7) is larger than that of the drill hole (3).
5. The cutting type large-deformation prestressed hydraulic expansion grouting anchor rod as claimed in claim 4, wherein: the grouting holes (13) are arranged inside the inner rod body (2).
6. The cutting type large-deformation prestressed hydraulic expansion grouting anchor rod as claimed in claim 5, wherein: the grouting holes (13) comprise grouting main holes (13.1) and grouting branch holes (13.2);
the grouting main hole (13.1) is of a through hole structure;
the grouting main hole (13.1) is arranged inside the inner rod body (2);
one end of the grouting branch hole (13.2) is communicated with the grouting main hole (13.1), and the other end is arranged on the outer wall of the inner rod body (2).
7. The cutting type large-deformation prestressed hydraulic expansion grouting anchor rod as claimed in claim 6, wherein: a main grouting hole (13.1) penetrates through the inner rod body (2); the length of the grouting main hole (13.1) is equal to that of the inner rod body (2);
the plurality of grouting branch holes (13.2) are arranged in a staggered manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221159182.3U CN217813548U (en) | 2022-05-13 | 2022-05-13 | Rod body cutting type large-deformation prestress hydraulic expansion grouting anchor rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221159182.3U CN217813548U (en) | 2022-05-13 | 2022-05-13 | Rod body cutting type large-deformation prestress hydraulic expansion grouting anchor rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217813548U true CN217813548U (en) | 2022-11-15 |
Family
ID=83983559
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221159182.3U Active CN217813548U (en) | 2022-05-13 | 2022-05-13 | Rod body cutting type large-deformation prestress hydraulic expansion grouting anchor rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217813548U (en) |
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2022
- 2022-05-13 CN CN202221159182.3U patent/CN217813548U/en active Active
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