阅读说明：本技术 径向膨胀挤压型锚杆 (Radial expansion extrusion type anchor rod ) 是由 袁维 王立言 刘雅帆 彭澍 王安礼 薛彦雨 李朝博 王伟 于 2021-08-16 设计创作，主要内容包括：本发明提供了一种径向膨胀挤压型锚杆,属于锚杆技术领域,包括锚杆体、托盘、牵拉组件和膨胀组件,托盘滑动设置在锚杆体外端部,用于抵在锚杆孔的孔口或固定在锚杆孔外端；牵拉组件沿锚杆体的轴线方向设在锚杆体上,且外端与托盘连接,内端延伸至锚杆体的中部或内端部,并用于随托盘与锚杆体产生相对运动；膨胀组件沿锚杆体的轴线方向设在锚杆体外部,且外端与锚杆体外端部连接,内端与牵拉组件连接,用于在牵拉组件的运动而膨胀、以进一步挤压锚杆孔的孔壁。本发明能够在后期岩体发生变形时,通过膨胀组件的膨胀进一步挤压锚杆孔的孔壁,增强锚固效果,减缓锚杆体外端的相对移动和岩体变形。(The invention provides a radial expansion extrusion type anchor rod, which belongs to the technical field of anchor rods and comprises an anchor rod body, a tray, a traction component and an expansion component, wherein the tray is arranged at the outer end part of the anchor rod body in a sliding manner and is used for abutting against an orifice of an anchor rod hole or being fixed at the outer end of the anchor rod hole; the traction assembly is arranged on the anchor rod body along the axis direction of the anchor rod body, the outer end of the traction assembly is connected with the tray, and the inner end of the traction assembly extends to the middle part or the inner end part of the anchor rod body and is used for generating relative motion along with the tray and the anchor rod body; the expansion component is arranged outside the anchor rod body along the axis direction of the anchor rod body, the outer end of the expansion component is connected with the outer end of the anchor rod body, and the inner end of the expansion component is connected with the traction component and used for expanding when the traction component moves so as to further extrude the hole wall of the anchor rod hole. According to the invention, when the rock mass is deformed in the later period, the hole wall of the anchor rod hole is further extruded through the expansion of the expansion assembly, the anchoring effect is enhanced, and the relative movement of the outer end of the anchor rod body and the deformation of the rock mass are slowed down.)

1. A radially expandable extrusion-type rock bolt, comprising:

an anchor rod body (10);

the tray (20) is arranged at the outer end of the anchor rod body (10) in a sliding mode and used for abutting against the hole opening of the anchor rod hole or being fixed at the outer end of the anchor rod hole;

the traction assembly (30) is arranged on the anchor rod body (10) along the axial direction of the anchor rod body (10), the outer end of the traction assembly is connected with the tray (20), and the inner end of the traction assembly extends to the middle part or the inner end part of the anchor rod body (10) and is used for generating relative movement with the tray (20) and the anchor rod body (10);

the expansion component (40) is arranged outside the anchor rod body (10) along the axial direction of the anchor rod body (10), the outer end of the expansion component is connected with the outer end part of the anchor rod body (10), and the inner end of the expansion component is connected with the traction component (30) and is used for expanding under the movement of the traction component (30) so as to further extrude the hole wall of the anchor rod hole.

2. A radially expandable extrusion-type anchor rod as set forth in claim 1, wherein: the pulling assembly (30) comprises a sliding piece (31) and a plurality of pull rods (32), wherein the sliding piece (31) is arranged at the middle part or the inner end part in a sliding way and is connected with the inner end of the expansion assembly (40); a plurality of pull rods (32) surround the periphery of the anchor rod body (10), and the two ends of each pull rod (32) are connected with the sliding part (31) and the tray (20) respectively.

3. A radially expandable extrusion-type anchor rod as set forth in claim 2, wherein: the traction assembly (30) further comprises a plurality of adjusting nuts (33), the plurality of adjusting nuts (33) and the plurality of pull rods (32) are arranged in a one-to-one correspondence manner, the outer end of each pull rod (32) is in sliding fit with the tray (20) and is provided with an external thread matched with the corresponding adjusting nut (33), and the pull rod (32) adjusts the distance between the sliding piece (31) and the tray (20) through the corresponding adjusting nut (33); the sliding part (31) is of an annular plate-shaped structure sleeved on the anchor rod body (10).

4. A radially expandable extrusion-type anchor rod as set forth in claim 1, wherein: the expansion assembly (40) comprises an expansion sleeve (41), the expansion sleeve (41) is of an elastic rubber sleeve structure, the inner end of the expansion sleeve is connected with the inner end of the traction assembly (30), the outer end of the expansion sleeve is fixedly connected with the anchor rod body (10), and the expansion sleeve is used for being extruded by the inner end of the traction assembly (30) to generate radial expansion when the traction assembly (30) is pulled by the tray (20) to move outwards.

5. A radially expandable extrusion-type anchor rod according to any one of claims 1 to 4, wherein: the expansion assembly (40) comprises a plurality of curved rods (42), the curved rods (42) are arranged around the periphery of the anchor rod body (10) in an annular mode, the outer end of each curved rod (42) is fixedly connected with the outer end of the anchor rod body (10), and the inner end of each curved rod (42) is fixedly connected with the inner end of the traction assembly (30); each curved rod (42) is bent along the radial direction of the anchor rod body (10) so that the curved rod (42) generates a convex deformation along the radial direction of the anchor rod body (10) when being extruded by the traction assembly (30) and further extrudes the hole wall of the anchor rod hole.

6. A radially expandable extrusion-type anchor as set forth in claim 5, wherein: expansion element (40) still includes uide bushing (43), uide bushing (43) slip cover is established on the stock body (10), and be equipped with curved bar (42) complex guide way (44), guide way (44) are used for the restriction curved bar (42) are followed the deformation of stock body (10) circumference.

7. A radially expandable extrusion-type anchor rod as set forth in claim 6, wherein: curved bar (42) are wave member, uide bushing (43) cover is established be close to on curved bar (42) the position of the stock body (10), guide way (44) are V type groove, guide way (44) middle part and curved bar (42) butt, and both ends are used for supplying curved bar (42) are along stock body (10) radial slip.

8. A radially expandable extrusion-type anchor as set forth in claim 5, wherein: expansion element (40) still include slip thimble (45) and guide sleeve (46), guide sleeve (46) are followed the stock body (10) radially sets up, and one end with stock body (10) fixed connection, slip thimble (45) one end slides and sets up in guide sleeve (46), and the middle part with the position of curved bar (42) evagination is connected, the other end is arranged in inserting the cliff.

9. A radially expandable extrusion-type anchor as set forth in claim 8, wherein: the inner wall of the guide sleeve (46) and one end, located in the guide sleeve (46), of the sliding thimble (45) are provided with inverted tooth structures matched with each other, and the inverted tooth structures are used for enabling the sliding thimble (45) to be clamped and not to return after sliding out.

10. A radially expandable extrusion-type anchor rod as set forth in claim 1, wherein: the anchor rod body (10) is cavity slip casting stock structure, the anchor rod body (10) is inside to be equipped with the slip casting hole along the axial, anchor rod body (10) inner is equipped with anchor section (11), just anchor rod body (10) middle part is close to anchor section one side be equipped with grout outlet (12) of slip casting hole intercommunication, anchor rod body (10) outer end is equipped with and is used for the shutoff grout stop cap (13) in slip casting hole.

Technical Field

The invention belongs to the technical field of anchor rods, and particularly relates to a radial expansion extrusion type anchor rod.

Background

In tunnel and side slope engineering, the stock is widely used as an economical and practical's building tool, and in current stock anchor technical field, the stock is solid threaded rod usually, perhaps uses anchor rope etc. to consolidate the fissure rock mass, and the common mode is for after drilling through the drill bit, directly settles the stock in the anchor eye slip casting, utilizes the frictional force between stock and the slip casting body to realize the reinforcement to the fissure rock mass, can produce some weak points like this: for example, the limited contact surface between the anchor rod and the grout body can generate insufficient friction to support the surrounding rock deformation, so that the anchor rod is pulled out of the grout body; or the surrounding rock is caused to generate a loose ring in the drilling process so that the contact between the surrounding rock and the anchor rod is loosened, the anchor rod easily slides from the rock, and the anchoring effect of the anchor rod cannot be effectively exerted.

Disclosure of Invention

The invention aims to provide a radial expansion extrusion type anchor rod to solve the technical problem of poor anchoring property of the anchor rod in the prior art.

In order to achieve the purpose, the invention adopts the technical scheme that: the tray is arranged at the outer end of the anchor rod body in a sliding mode and used for abutting against an orifice of an anchor rod hole or being fixed at the outer end of the anchor rod hole; the traction assembly is arranged on the anchor rod body along the axis direction of the anchor rod body, the outer end of the traction assembly is connected with the tray, and the inner end of the traction assembly extends to the middle part or the inner end part of the anchor rod body and is used for generating relative motion along with the tray and the anchor rod body; the expansion component is arranged outside the anchor rod body along the axis direction of the anchor rod body, the outer end of the expansion component is connected with the outer end of the anchor rod body, and the inner end of the expansion component is connected with the traction component and used for expanding when the traction component moves so as to further extrude the hole wall of the anchor rod hole.

In one possible implementation mode, the pulling assembly comprises a sliding piece and a plurality of pulling rods, wherein the sliding piece is arranged at the middle part or the inner end part in a sliding mode and is connected with the inner end of the expansion assembly; the pull rods are arranged around the periphery of the anchor rod body, and the two ends of each pull rod are connected with the sliding part and the tray respectively.

In a possible implementation mode, the traction assembly further comprises a plurality of adjusting nuts, the plurality of adjusting nuts and the plurality of pull rods are arranged in a one-to-one correspondence mode, the outer end of each pull rod is in sliding fit with the tray and is provided with external threads matched with the corresponding adjusting nut, and the pull rods adjust the distance between the sliding piece and the tray through the corresponding adjusting nuts; the sliding part is an annular plate-shaped structure sleeved on the anchor rod body.

In a possible implementation mode, the expansion assembly comprises an expansion sleeve, the expansion sleeve is of an elastic rubber sleeve structure, the inner end of the expansion sleeve is connected with the inner end of the traction assembly, and the outer end of the expansion sleeve is fixedly connected with the anchor rod body and used for being extruded by the inner end of the traction assembly to generate radial expansion when the traction assembly is pulled by the tray to move outwards.

In one possible implementation manner, the expansion assembly comprises a plurality of curved rods, the curved rods are annularly arranged around the periphery of the anchor rod body, the outer end of each curved rod is fixedly connected with the outer end of the anchor rod body, and the inner end of each curved rod is fixedly connected with the inner end of the traction assembly; each curved rod is bent along the radial direction of the anchor rod body, so that the curved rods generate the radial protruding deformation along the anchor rod body when being extruded by the traction assembly, and further extrude the hole wall of the anchor rod hole.

In a possible implementation manner, the expansion assembly further comprises a guide sleeve, the guide sleeve is slidably sleeved on the anchor rod body and is provided with a guide groove matched with the curved rod, and the guide groove is used for limiting the deformation of the curved rod along the circumferential direction of the anchor rod body.

In a possible implementation mode, the curved bar is a wave-shaped rod piece, the guide sleeve is sleeved on the curved bar at a position close to the anchor rod body, the guide groove is a V-shaped groove, the middle part of the guide groove is abutted against the curved bar, and two ends of the guide groove are used for allowing the curved bar to slide along the anchor rod body in the radial direction.

In a possible implementation manner, the expansion assembly further comprises a sliding thimble and a guide sleeve, the guide sleeve is arranged along the radial direction of the anchor rod body, one end of the guide sleeve is fixedly connected with the anchor rod body, one end of the sliding thimble is arranged in the guide sleeve in a sliding mode, the middle of the sliding thimble is connected with the convex part of the curved rod, and the other end of the sliding thimble is used for being inserted into the rock wall.

In a possible implementation mode, the inner wall of the guide sleeve and one end, located in the guide sleeve, of the sliding thimble are provided with inverted tooth structures which are matched with each other, and the inverted tooth structures are used for enabling the sliding thimble to be clamped and not to return after sliding out.

In a possible implementation mode, the anchor rod body is of a hollow grouting anchor rod structure, grouting holes are axially formed in the interior of the anchor rod body, an anchoring section is arranged at the inner end of the anchor rod body, a grout outlet communicated with the grouting holes is formed in one side, close to the anchoring section, of the middle of the anchor rod body, and a grout stopping cap used for plugging the grouting holes is arranged at the outer end of the anchor rod body.

The radial expansion extrusion type anchor rod provided by the invention has the beneficial effects that: compared with the prior art, when the anchor rod is used, the anchor rod body is inserted into the anchor rod hole which is punched in advance until the tray is abutted against the orifice of the anchor rod hole or can be fixed at the outer end of the anchor rod hole, so that the traction component and the expansion component enter the anchor rod hole, and the front section of the anchor rod body is grouted and anchored in advance or later according to the specific model of the anchor rod body; when the deformation takes place for the later stage rock mass, the relative movement takes place for the drill way in stock body and stock hole, make the stock body to downthehole removal, because the tray supports the drill way in stock hole or fixes in the stock hole outer end, consequently the tray can produce relative motion with the stock body, thereby make the tractive subassembly that links to each other with the tray produce relative motion with the stock body, and then make the pressurized inflation of inflation subassembly, further extrude the pore wall in stock hole, reinforcing anchor effect slows down the relative movement and the rock mass deformation of stock body outer end.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a schematic structural view of a radial expansion compression type anchor rod according to an embodiment of the present invention;

fig. 2 is a partially sectional view in elevation of a radially expandable compression anchor according to another embodiment of the present invention, with the expansion sleeve hidden, and shown in phantom;

fig. 3 is a side view schematically illustrating a guide sleeve portion of a radial expansion compression type anchor according to another embodiment of the present invention.

Wherein the reference numerals in the figures are as follows:

10. an anchor rod body; 11. an anchoring section; 12. a slurry outlet; 13. a grout stopping cap;

20. a tray;

30. a pulling assembly; 31. a slider; 32. a pull rod; 33. adjusting the nut;

40. an expansion assembly; 41. an expansion sleeve; 42. a curved bar; 43. a guide sleeve;

44. a guide groove; 45. sliding the thimble; 46. a guide sleeve; 47. a pull rod hole.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The present invention provides a radially expandable compression type anchor.

Referring to fig. 1 and 2 together, a radial expansion extrusion type anchor rod according to a first embodiment of the present invention includes an anchor rod body 10, a tray 20, a pulling member 30 and an expansion member 40, wherein the tray 20 is slidably disposed at an outer end of the anchor rod body 10 for abutting against an opening of an anchor rod hole or being fixed at the outer end of the anchor rod hole; the traction assembly 30 is arranged on the anchor rod body 10 along the axial direction of the anchor rod body 10, the outer end of the traction assembly is connected with the tray 20, and the inner end of the traction assembly extends to the middle part or the inner end part of the anchor rod body 10 and is used for generating relative motion with the tray 20 and the anchor rod body 10; the expansion assembly 40 is disposed outside the bolt body 10 along the axial direction of the bolt body 10, and has an outer end connected to the outer end of the bolt body 10 and an inner end connected to the pulling assembly 30, and is configured to expand upon movement of the pulling assembly 30 to further squeeze the wall of the bolt hole. The inner is referred to herein as the direction towards the inside of the anchor rod bore and the outer is the direction towards the outside of the anchor rod bore.

Compared with the prior art, in the radial expansion extrusion type anchor rod provided by the embodiment, when in use, the anchor rod body 10 is inserted into the anchor rod hole which is drilled in advance until the tray 20 abuts against the hole opening of the anchor rod hole or can be fixed at the outer end of the anchor rod hole, so that the traction component 30 and the expansion component 40 enter the anchor rod hole, and the front section of the anchor rod body 10 is grouted and anchored in advance or later according to the specific model of the anchor rod body 10; when the rock mass of later stage takes place to warp, the relative motion takes place for the drill way of stock 10 and stock hole, make the stock 10 move to the downthehole, because tray 20 supports in the drill way of stock hole or fixes at the stock hole outer end, consequently tray 20 can produce relative motion with the stock 10, thereby make the tractive subassembly 30 that links to each other with tray 20 and produce relative motion with the stock 10, and then make expansion assembly 40 pressurized inflation, further extrude the pore wall of stock hole, reinforcing anchor effect, slow down the relative motion and the rock mass deformation of stock 10 outer end.

Further, referring to fig. 2 and fig. 3 together, a first embodiment of the present invention further provides the following embodiments:

the pulling assembly 30 comprises a sliding piece 31 and a plurality of pull rods 32, wherein the sliding piece 31 is arranged at the middle part or the inner end part in a sliding way and is connected with the inner end of the expansion assembly 40; a plurality of tie rods 32 are arranged around the circumference of the mooring body 10 and each tie rod 32 is connected at both ends to the slider 31 and the tray 20 respectively.

The expansion component 40 can be stably applied with annular tension by annularly arranging a plurality of pull rods 32, so that the expansion component can be uniformly expanded.

The pulling assembly 30 further comprises a plurality of adjusting nuts 33, the plurality of adjusting nuts 33 are arranged in one-to-one correspondence with the plurality of pull rods 32, the outer end of each pull rod 32 is in sliding fit with the tray 20 and is provided with an external thread matched with the corresponding adjusting nut 33, and the pull rod 32 adjusts the distance between the sliding piece 31 and the tray 20 through the corresponding adjusting nut 33; the sliding member 31 is a ring-shaped plate-shaped structure that is sleeved on the anchor rod body 10.

During the construction, insert the stock body 10 behind the stock hole, can draw slider 31 through adjusting nut 33 and expand the preliminary tensioning of inflation subassembly 40, make inflation subassembly 40 preliminary card earlier in the stock hole, and when later stage rock mass takes place to warp, the movement of stock body 10 can continue to drive inflation subassembly 40 further inflation, plays better anchor effect.

Further, referring to fig. 2 and fig. 3 together, a first embodiment of the present invention further provides the following embodiments:

the expansion assembly 40 comprises an expansion sleeve 41, the expansion sleeve 41 is an elastic rubber sleeve structure, the inner end of the expansion sleeve is connected with the inner end of the traction assembly 30, the outer end of the expansion sleeve is fixedly connected with the anchor rod body 10, and the expansion sleeve is used for being extruded by the inner end of the traction assembly 30 to generate radial expansion when the traction assembly 30 is pulled by the tray 20 to move outwards. The expansion sleeve 41 can be expanded outwards uniformly and is in surface contact with the wall of the anchor rod hole to block the whole anchor rod hole, so that a good anchoring effect can be achieved, and slurry leakage during grouting can be avoided.

The expansion assembly 40 comprises a plurality of curved rods 42, the curved rods 42 are annularly arranged around the periphery of the anchor rod body 10, the outer end of each curved rod 42 is fixedly connected with the outer end of the anchor rod body 10, and the inner end of each curved rod 42 is fixedly connected with the inner end of the traction assembly 30; each curved rod 42 is bent in the radial direction of the bolt body 10 so that the curved rod 42, when pressed by the pulling member 30, is convexly deformed in the radial direction of the bolt body 10 to further press the wall of the bolt hole. The curved rod 42 is in point contact with the hole wall of the anchor rod hole, and strong extrusion is generated on the local part of the hole wall of the anchor rod hole, so that a strong anchoring effect is generated.

In a specific application, the expansion assembly 40 may be only the expansion sleeve 41, only the curved rod 42, or a combination of the expansion sleeve 41 and the curved rod 42, and a groove may be formed in the expansion sleeve 41 to make up a deformation space of the curved rod 42 during the combination, so that the curved rod 42 is not sealed by the slurry penetrating during grouting, and the advantages of the expansion sleeve 41 and the curved rod 42 can be comprehensively utilized to obtain a better anchoring effect.

Also, the expansion assembly 40 may be other forms of structures or assemblies capable of generating expansion.

Further, referring to fig. 2 and fig. 3, an embodiment of the present invention based on the above embodiment is as follows:

the expansion assembly 40 further comprises a guide sleeve 43, the guide sleeve 43 is slidably sleeved on the anchor rod body 10 and is provided with a guide groove 44 matched with the curved rod 42, and the guide groove 44 is used for limiting the deformation of the curved rod 42 along the circumferential direction of the anchor rod body 10. The guide sleeve 43 can reduce the deformation of the curved bar 42 along the circumferential direction of the anchor rod body 10, so that the curved bar 42 is intensively deformed along the radial direction of the anchor rod body 10, and the anchoring effect is enhanced.

The curved bar 42 is a wave-shaped bar, the guide sleeve 43 is sleeved on the curved bar 42 at a position close to the anchor rod body 10, the guide groove 44 is a V-shaped groove, the middle part of the guide groove 44 is abutted against the curved bar 42, and two ends of the guide groove are used for allowing the curved bar 42 to slide along the radial direction of the anchor rod body 10, so that the local deformation of the part of the curved bar 42 far away from the anchor rod body 10 is aggravated.

The guide sleeve 43 is further provided with a pull rod hole 47 for the pull rod to pass through.

The expansion assembly 40 further comprises a sliding thimble 45 and a guide sleeve 46, wherein the guide sleeve 46 is arranged along the anchor rod body 10 in the radial direction, and one end of the guide sleeve 46 is fixedly connected with the anchor rod body 10, one end of the sliding thimble 45 is arranged in the guide sleeve 46 in a sliding manner, the middle part of the sliding thimble is connected with the convex part of the curved rod 42, and the other end of the sliding thimble is inserted into the rock wall. The sliding thimble 45 and the guide sleeve 46 cooperate to guide the crank 42 in the full direction and to prevent twisting of the crank 42.

The inner wall of the guide sleeve 46 and one end of the sliding thimble 45 in the guide sleeve 46 are provided with inverted tooth structures which are matched with each other, and the inverted tooth structures are used for enabling the sliding thimble 45 to be clamped and not to return after sliding out, so that the anchoring performance is enhanced.

Further, referring to fig. 1 and fig. 2, an embodiment of the present invention based on the above embodiment is as follows:

the anchor body 10 may be a conventional anchor or may be another type of anchor.

Specifically, the anchor rod body 10 is the cavity slip casting stock structure, and the anchor rod body 10 is inside to be equipped with the slip casting hole along the axial, and anchor rod body 10 inner is equipped with anchor section 11, and anchor rod body 10 middle part is close to anchor section one side and is equipped with the grout outlet 12 with the slip casting hole intercommunication, and anchor rod body 10 outer end is equipped with the grout cap 13 that ends that is used for the shutoff slip casting hole.

The anchor rod provided by the invention is suitable for tunnel or slope protection, and the specific construction method comprises the following steps, and specifically takes the anchor rod body 10 in the form of a hollow grouting anchor rod as an example.

1. Generally, a hydraulic drill jumbo or a simple scaffold is adopted to drill an anchor rod hole, after the top finding operation is carried out, the initial spraying operation is carried out on the soft layer of the surrounding rock, and the anchor rod hole drilling is carried out.

2. When the hole is opened, the drill rod is perpendicular to the excavation contour line of the anchor hole, and the water pressure, the water quantity and the broken sand and broken stone can be removed in time when the hole is drilled.

3. After the drill jumbo leaves the anchor eye, directly use high pressure water to wash the anchor eye until the clear water flows out of the anchor eye, and for the anchor eye that declines, still need to use high-pressure wind to blow out downthehole residue, mud bits etc. in order to prevent that the stock from pushing into.

4. For the downward-inclined anchor hole, the anchor rod structure can be directly arranged in the hole for grouting after hole cleaning operation is finished, a double-pipe grouting process is preferably adopted for the upward-inclined anchor hole, and grouting is carried out after an exhaust pipe is bound on the outer wall of the anchor rod body 10.

5. After the anchor rod structure of the present invention is installed, the tray 20 is tightly adhered to the rock wall, and at this time, the adjusting nut 33 is installed on the pull rod 32, and after the adjusting nut 33 is tightly adhered to the tray 20, the adjusting nut 33 is continuously rotated and screwed to drive the pull rod 32 to extend outwards, so that the sliding member 31 slides backwards, and the expansion sleeve 41 and/or the curved rod 42 are/is compressed axially and expanded outwards in the radial direction.

6. After the radial expansion device is expanded preliminarily, grouting is carried out through the grouting holes of the anchor rod body 10, grouting is completed through the grout outlet 12, when the pressure value of the mortar pump is increased suddenly to indicate that grouting is completed, and grouting is completed by screwing the grout stopping cap 13.

After the surrounding rock is deformed, the tray 20 and the adjusting nut 33 are driven to move outwards along the anchor rod body 10, wherein the anchor nut is in threaded connection with the pull rod 32, so that the pull rod 32 is continuously stretched outwards to drive the sliding part 31 to slide outwards along the rod body, the expansion sleeve 41 and/or the curved rod 42 are further compressed axially, and further expanded outwards in the radial direction, and the effect of secondary expansion is achieved.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.