CN214993803U

CN214993803U - Self-drilling high-strength composite anchor rod

Info

Publication number: CN214993803U
Application number: CN202023314351.XU
Authority: CN
Inventors: 朱庆凯; 宋伟杰; 李建平; 杜英杰; 刘光磊; 武思宇; 刘兴华
Original assignee: Zhongyan Technology Co Ltd
Current assignee: Zhongyan Technology Co Ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-12-03
Anticipated expiration: 2030-12-31

Abstract

The utility model discloses a self-drilling high-strength composite anchor rod, belonging to the technical field of construction of constructional engineering, comprising a free section, an anchoring section, a grouting pipe, a threaded bracket, a grouting hole, a sharp body, a turntable and a high-pressure nozzle; the anchoring section and the grouting pipe are both of a circular tube-shaped structure, one end of the anchoring section, which is close to the free section, is provided with a bearing, the turntable is connected with the anchoring section through the bearing, the free section is connected with the turntable through a bolt, the grouting pipe is connected with the anchoring section through a thread, a spiral support is welded on the outer surface of the anchoring section, a grouting hole is reserved on the anchoring section, the anchoring section is welded with a high-pressure nozzle close to the point body, and the anchoring section is connected with the point body through welding. The utility model solves the problem that the anchor rod is not easy to insert when the hole collapse phenomenon occurs by arranging the sharp body; through setting up the helical support and adopting the post slip casting, form better anchor and provide more excellent reinforcement effect around the anchor section to the helical support has increased the bond stress of anchor section and anchor.

Description

Self-drilling high-strength composite anchor rod

Technical Field

The utility model relates to a building engineering construction technical field, in particular to from boring compound stock of type high strength.

Background

With the increasing development strength and depth of underground engineering, deep foundation pit supporting becomes a difficult problem which restricts the high-rise building from high efficiency and safe construction. After the foundation pit is excavated, the side wall of the foundation pit and the soil body slope are easy to deform greatly, and the supporting structure fails. The safety issues of underground works are becoming more and more important. The traditional anchor rod is widely applied to projects such as water conservancy and hydropower, industrial and civil construction, traffic, municipal administration and the like. The reliability of the working performance of the anchor rod determines the safety of the supporting engineering, and particularly when the anchoring section of the anchor rod is in a soft and complex stratum, how to adopt effective measures to ensure and improve the anchoring performance of the anchor rod becomes a difficult point and a key point in the construction process.

At present, an anchor rod used in underground engineering and slope reinforcement engineering mainly transfers load by depending on the bonding force and the friction force between an anchoring section and the surrounding soil body, and belongs to a friction type anchor rod. The main problems existing in the method are as follows: (1) the size of the anchoring force depends on factors such as the length of the anchoring section and the property of a soil body contacted with the anchoring section, if a special weak soil body is encountered, the reinforcing effect is poor, and the common high-pressure jet expanded head anchor rod has the problems of low cement soil strength and poor bond wrapping force between the anchoring body and the anchor rod body; (2) when holes are formed in a soft soil layer or a sandy soil layer, hole wall collapse or necking is easy to occur, the hole expansion effect is poor, and the quality of slurry after forming is difficult to ensure.

The technical proposal of the Chinese utility model patent with the publication number of CN209891200U is as follows: the anchor rod device is formed by welding three threaded steel bars and a positioning ring, the three threaded steel bars are welded on the outer side of the positioning ring, and the three threaded steel bars are parallel to the part above the ring and are fixed at intervals; the three threaded steel bars are bound below the circular ring to form a cone, and the lower ends of the three threaded steel bars are welded together. This patent is through setting up the cone, when having solved the phenomenon that "hole collapse" appears, the difficult male problem of stock. But does not solve the problems of small bond stress and poor reinforcing effect. Therefore, the utility model provides a from compound stock of brill type high strength solves above-mentioned problem.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned technical problem that exists among the prior art, the utility model provides a from compound stock of brill type high strength has overcome the not enough of prior art. By arranging the pointed body, the problem that the anchor rod is not easy to insert when the hole collapse phenomenon occurs is solved; through setting up the helical support and adopting the post slip casting, form better anchor and provide more excellent reinforcement effect around the anchor section to the helical support has increased the bond stress of anchor section and anchor.

The utility model provides a from compound stock of type of boring high strength which characterized in that: comprises a free section, an anchoring section, a grouting pipe, a threaded bracket, a grouting hole, a pointed body, a turntable and a high-pressure nozzle; the anchor section and the slip casting pipe are circular tubular structures, the anchor section is close to free section one end and installs the bearing, and the carousel passes through the bearing to be connected with the anchor section, adopt bolted connection between free section and the carousel, the slip casting pipe passes through threaded connection with the anchor section, the welding has a helical support on the anchor section surface, has the slip casting hole in advance in the anchor section, and the anchor section is close to sharp body department welding and has high pressure nozzle, passes through welded connection between anchor section and the sharp body.

Preferably, the free section is a steel bar or a steel strand, and a rubber isolation layer is arranged on the surface of the steel bar or the steel strand.

Preferably, the lower extreme of slip casting pipe is public head, and the upper end of anchor section is female head, and the screw thread that has mutually coincided is attacked to public head and female head, screws up when the fixed public head of female head clockwise rotation, otherwise breaks away from.

Preferably, the width of the threaded support is 5 cm-10 cm, the thread pitch is 10 cm-20 cm, the thickness of the threaded support is 2 mm-4 mm, and the threaded support drills down when rotating clockwise.

Preferably, the grouting holes are circular, the diameter of each grouting hole is 1 cm-3 cm, two rows of the grouting holes are arranged, and the two rows of the grouting holes are symmetrically distributed along the central axis of the anchoring section.

Preferably, the pointed body is conical, the height of the pointed body is 10 cm-20 cm, and the maximum circular section diameter of the pointed body is the same as the section diameter of the anchoring section.

Preferably, the diameter of the rotating disc is 10 cm-20 cm, and the thickness of the rotating disc is 5 mm-10 mm.

Preferably, the high-pressure nozzle includes the public head of nozzle, the female head of nozzle, filter screen, and the public head of nozzle passes through welded connection with the anchor section, passes through threaded connection between the public head of nozzle and the female head of nozzle, inlays between public head of nozzle and the female head of nozzle and has the filter screen, and the mesh of filter screen is circular, and the diameter of mesh is 1mm ~2 mm.

The utility model discloses the beneficial technological effect who brings:

(1) by arranging the pointed body, the problem that the anchor rod is not easy to insert when the hole collapse phenomenon occurs is solved; (2) by arranging the spiral support and adopting post-grouting, a better anchoring body is formed around the anchoring section to provide a better reinforcing effect, and the spiral support increases the bond stress between the anchoring section and the anchoring body; (3) the grouting pipe can be recycled after being used once, so that the material is saved, and the engineering cost is reduced.

Drawings

Fig. 1 is the utility model relates to a structural schematic diagram of self-drilling type high strength composite anchor rod.

Fig. 2 is the utility model relates to a high pressure nozzle's in self-drilling type high strength composite anchor rod structure dissects the sketch map.

Wherein, the device comprises a 1-free section, a 2-anchoring section, a 3-grouting pipe, a 4-threaded bracket, a 5-grouting hole, a 6-pointed body and a 7-rotary table.

Detailed Description

The invention is described in further detail below with reference to the following figures and detailed description:

example 1:

as shown in figures 1-2, a self-drilling high-strength composite anchor rod is characterized in that: comprises a free section 1, an anchoring section 2, a grouting pipe 3, a threaded bracket 4, a grouting hole 5, a pointed body 6, a turntable 7 and a high-pressure nozzle 8; anchor section 2 and slip casting pipe 3 are the pipe column structure, anchor section 2 is close to 1 one end of free section and installs the bearing, and carousel 7 passes through the bearing to be connected with anchor section 2, adopt bolted connection between free section 1 and the carousel 7, slip casting pipe 3 passes through threaded connection with anchor section 2, the welding has spiral support 4 on 2 surfaces of anchor section, and anchor section 2 is last to reserve has slip casting hole 5, and anchor section 2 is close to the welding of 6 departments of sharp body and has high pressure nozzle 8, through welded connection between anchor section 2 and the sharp body 6.

Preferably, the free section 1 is a steel bar or a steel strand, and a rubber isolation layer is arranged on the surface of the steel bar or the steel strand.

Preferably, the lower extreme of slip casting pipe 3 is public head, and the upper end of anchor section 2 is female head, and the screw thread that has mutually coincided is attacked to public head and female head, and when female head is fixed, screw up when public head clockwise rotation, otherwise breaks away from.

Preferably, the width of the threaded support 4 is 5 cm-10 cm, the thread pitch is 10 cm-20 cm, the thickness of the threaded support 4 is 2 mm-4 mm, and the threaded support 4 is drilled downwards when rotating clockwise.

Preferably, the grouting holes 5 are circular, the diameter of the grouting holes 5 is 1 cm-3 cm, two rows of the grouting holes 5 are arranged, and the two rows of the grouting holes 5 are symmetrically distributed along the central axis of the anchoring section 2.

Preferably, the pointed body 6 is conical, the height of the pointed body 6 is 10 cm-20 cm, and the maximum circular section diameter of the pointed body 6 is the same as the section diameter of the anchoring section 2.

Preferably, the diameter of the rotating disc 7 is 10 cm-20 cm, and the thickness of the rotating disc 7 is 5 mm-10 mm.

Preferably, the high-pressure nozzle comprises a nozzle male head 81, a nozzle female head 82 and a filter screen 83, the nozzle male head 81 is connected with the anchoring section 2 through welding, the nozzle male head 81 is connected with the nozzle female head 82 through threads, the filter screen 83 is embedded between the nozzle male head 81 and the nozzle female head 82, meshes of the filter screen 83 are circular, and the diameter of each mesh is 1 mm-2 mm.

Example 2:

as shown in figures 1-2, the self-drilling high-strength composite anchor rod of the utility model is used for construction, firstly, the anchor rod hole is formed by construction methods such as jet grouting or stirring, a roof bolter is used for pushing the grouting pipe 3 into the anchor rod hole, if necking phenomena and the like occur in the anchor rod hole, when the anchor rod is pushed slowly or can not be pushed continuously, clean water is pumped into the grouting pipe 3 at high pressure, the clean water acts on peripheral soil after passing through a high-pressure nozzle, meanwhile, the grouting pipe 3 is rotated clockwise, the grouting pipe 3 drives the rotating bracket 4 on the anchoring section 2 to rotate, so that the high-pressure water flow and the rotating bracket 4 are screwed into a common action downwards until the necking section is passed, the grouting pipe 3 is stopped to rotate and continue to push the grouting pipe to sink after passing through the necking section, until the design depth is reached, then grouting is carried out through the grouting pipe 3, the slurry consistency is adjusted, so that the slurry can not pass through the filter screen 83 in the high-pressure nozzle 8 smoothly, grout flows into the cement soil around the rotating bracket 4 through the grouting holes 5, and an expanded head is formed after solidification, so that the bond stress between the anchoring section 2 and the anchoring body is increased.

The utility model relates to a self-drilling high-strength composite anchor rod, which solves the problem that the anchor rod is not easy to insert when the hole collapse phenomenon occurs by arranging a sharp body; by arranging the spiral support and adopting post-grouting, a better anchoring body is formed around the anchoring section to provide a better reinforcing effect, and the spiral support increases the bond stress between the anchoring section and the anchoring body; the grouting pipe can be recycled after being used once, so that the material is saved, and the engineering cost is reduced.

Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and the changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention also belong to the protection scope of the present invention.

Claims

1. The utility model provides a from compound stock of type of boring high strength which characterized in that: comprises a free section, an anchoring section, a grouting pipe, a threaded bracket, a grouting hole, a pointed body, a turntable and a high-pressure nozzle; the anchor section and the slip casting pipe are circular tubular structures, the anchor section is close to free section one end and installs the bearing, and the carousel passes through the bearing to be connected with the anchor section, adopt bolted connection between free section and the carousel, the slip casting pipe passes through threaded connection with the anchor section, the welding has a helical support on the anchor section surface, has the slip casting hole in advance in the anchor section, and the anchor section is close to sharp body department welding and has high pressure nozzle, passes through welded connection between anchor section and the sharp body.

2. A self-drilling high-strength composite anchor rod according to claim 1, wherein the free section is a steel bar or a steel strand, and a rubber isolation layer is arranged on the surface of the steel bar or the steel strand.

3. A self-drilling high-strength composite anchor rod according to claim 1, wherein the lower end of the grouting pipe is a male head, the upper end of the anchoring section is a female head, and the male head and the female head are provided with mutually matched threads, and are screwed when the female head fixes the male head to rotate clockwise, and are disengaged otherwise.

4. A self-drilling high-strength composite anchor rod according to claim 1, wherein the width of the threaded support is 5cm to 10cm, the thread pitch is 10cm to 20cm, the thickness of the threaded support is 2mm to 4mm, and the threaded support is drilled downwards when rotated clockwise.

5. The self-drilling high-strength composite anchor rod according to claim 1, wherein the grouting holes are circular, the diameter of each grouting hole is 1 cm-3 cm, two rows of grouting holes are arranged, and the two rows of grouting holes are symmetrically distributed along the central axis of the anchoring section.

6. The self-drilling high-strength composite anchor rod according to claim 1, wherein the pointed body is conical, the height of the pointed body is 10 cm-20 cm, and the maximum circular section diameter of the pointed body is the same as the section diameter of the anchoring section.

7. A self-drilling high-strength composite anchor rod according to claim 1, wherein the diameter of the rotary table is 10 cm-20 cm, and the thickness of the rotary table is 5 mm-10 mm.

8. The self-drilling high-strength composite anchor rod according to claim 1, wherein the high-pressure nozzle comprises a nozzle male head, a nozzle female head and a filter screen, the nozzle male head is connected with the anchoring section through welding, the nozzle male head is connected with the nozzle female head through threads, the filter screen is embedded between the nozzle male head and the nozzle female head, meshes of the filter screen are circular, and the diameter of each mesh is 1-2 mm.