CN113322949B

CN113322949B - Large-rigidity recyclable anchor pipe and construction method thereof

Info

Publication number: CN113322949B
Application number: CN202110660773.2A
Authority: CN
Inventors: 倪政东
Original assignee: Fujian Construction Textile Design Institute Co ltd
Current assignee: Fujian Construction Textile Design Institute Co ltd
Priority date: 2021-06-15
Filing date: 2021-06-15
Publication date: 2023-08-08
Anticipated expiration: 2041-06-15
Also published as: CN113322949A

Abstract

The invention discloses a high-rigidity recyclable anchor pipe and a construction method thereof, wherein the high-rigidity recyclable anchor pipe comprises a first splicing pipe, a first inserting plate, a second splicing pipe, a split column and a second inserting plate, the split column is used for detachably connecting the first splicing pipe and the second splicing pipe through the arrangement of the first splicing pipe and the second splicing pipe, after the anchor pipe is fixed, the pipe body of the first splicing pipe is used for bearing external shearing force, the split column serving as an elastic mechanism is prevented from being difficult to separate the first splicing pipe from the second splicing pipe, the splicing pipe structure has better shearing resistance, cement mortar is filled into the second splicing pipe through the wider anchoring section in the corresponding assembly hole of the second splicing pipe in the anchoring process, compared with the anchoring section fixed by friction force, the length required by fixing is shortened, and the first splicing pipe and the second inserting plate are convenient to separate and remove the first splicing pipe, so that the fixed length exceeds the ground red line is effectively avoided.

Description

Large-rigidity recyclable anchor pipe and construction method thereof

Technical Field

The invention relates to the technical field of civil engineering, in particular to a high-rigidity recyclable anchor pipe and a construction method thereof.

Background

With the continuous improvement of building technologies of building structures, the technical index requirements of foundation pit engineering are also continuously increasing for the safety and stability during the construction of underground structures.

As the required anchor body structure of foundation ditch soil retaining structure, it is through the crown roof beam of connecting vertical stake, in driving the anchor body into the soil body, relies on the anchor section to realize the fixed of vertical stake, avoids vertical stake to incline towards the foundation ditch direction.

The conventional recoverable anchor technology in the foundation pit engineering field mainly depends on recovery of anchor cable steel strands or adopts a steel bar anchor rod to recover by means of rotation and the like, however, the anchor rod has small rigidity and no shearing resistance. In practical engineering, especially, the foundation pit with the sliding surface is formed, so that once the anchoring body is subjected to shearing force, the anchoring body is deformed due to the shearing force when the anchoring body needs to be recovered, and the anchoring body cannot be recovered.

Disclosure of Invention

Therefore, it is necessary to provide a high-rigidity recyclable anchor pipe and a construction method thereof, so as to solve the problem that the anchor body cannot be recycled due to deformation of the anchor body caused by shearing force when the anchor body is required to be recycled once being subjected to shearing force in the prior art.

In order to achieve the above object, the present inventors provide a high-rigidity recyclable anchor pipe, one end of which is provided with a vertical pile, comprising a first splice pipe, a first splice plate, a second splice pipe, a split column and a second splice plate;

one end of the first splicing pipe is connected with the vertical pile, the other end of the first splicing pipe is provided with more than two bending sections, the bending sections are bent towards the central axis direction of the first splicing pipe, and the outer side face of each bending section is provided with a buckle;

the first plugboards are connected to the inner side surfaces of the bending sections of the first splice pipes, the number of the first plugboards is matched with the number of the bending sections, and gaps are formed between the first plugboards;

the inner side surface of one end of the second splicing pipe is provided with a buckle assembly groove which is matched with the buckle, the inner side surfaces of the first splicing pipe and the second splicing pipe are communicated, and the second splicing pipe is provided with a grouting hole penetrating through the inner side surface and the outer side surface;

the split column is arranged in the first splicing pipe;

the second plugboard is connected to one end of the disassembly column, which faces the bending section of the first splice pipe, and the size of the second plugboard is larger than the gap between the first plugboards.

Further, the grouting pipe is arranged in the first splicing pipe, penetrates through the first plugboard and is communicated with the second splicing pipe.

Further, the grouting pipe comprises a hose and a hard pipe, wherein the hard pipe penetrates through the first plugboard, and the hose is communicated with the hard pipe.

Further, the second splicing pipe further comprises a grout stopping steel plate, wherein the grout stopping steel plate is arranged on the inner side surface of the second splicing pipe and separates the buckle assembly groove from the grouting hole, and the grouting pipe penetrates through the plate surface of the steel plate.

Further, the surfaces of the first plugboard and the second plugboard are obliquely arranged.

Further, the second splicing pipe grouting holes are arranged on the outer side face of the second splicing pipe.

Further, the end part of the first splicing pipe is welded with the vertical pile.

Further, the inner side surface size of the second splicing pipe is matched with the outer side surface size of the first splicing pipe.

In order to achieve the above object, the present inventors also provide a construction method of a high-rigidity recyclable anchor pipe, in which a vertical pile is assembled in a construction area, the anchor pipe including a first splicing pipe and a second splicing pipe detachably connected to each other and a detachable column, the assembly hole being provided with a shear section and an anchor section, the aperture of the anchor section being larger than that of the assembly section, comprising the steps of:

step one, driving a variable-aperture drilling machine into soil in an anchor pipe region to be assembled to manufacture an assembly hole;

step two, the disassembly column locks the first splicing pipe and the second splicing pipe, and the anchor pipe is driven into the shearing resistant section of the assembly hole until the second splicing pipe reaches the anchor section of the assembly hole;

pouring cement mortar into the anchor pipe until the cement mortar fills the anchor section on the outer side surface of the second spliced pipe;

step four, connecting the first splicing pipe with the vertical pile;

and fifthly, waiting for hardening of the concrete to finish assembly.

Further, the method also comprises the following steps:

cutting off the first splicing pipe to separate the first splicing pipe from the vertical pile;

and step seven, unlocking the first splicing pipe and the second splicing pipe by the disassembling and assembling column, and pulling out the first splicing pipe and the disassembling and assembling column from the assembly hole.

Compared with the prior art, the technical scheme has the following advantages: through setting up first concatenation pipe and second concatenation pipe, the split post is used for removable connection first concatenation pipe and second concatenation pipe, after the anchor pipe is fixed, rely on the body of first concatenation pipe to bear external shearing force, avoided the split post as elastic mechanism to be difficult to separate first concatenation pipe and second concatenation pipe, and concatenation pipe structure has possessed better shear capacity, in the anchor in-process, correspond the anchor section of installing the downthehole broad through the second concatenation pipe, pour cement mortar into, expand the fixed space of second concatenation pipe, compare the anchor section fixed by means of frictional force, the required length of fixing has been shortened, make things convenient for first concatenation pipe to separate through first plugboard and second plugboard effectively avoided the fixed length of stock to surpass the problem of using the red line, and rely on detachable anchor pipe to construct, the shear force resistance has been guaranteed, and the fixed capacity of anchor, and make things convenient for first concatenation pipe to retrieve.

Drawings

FIG. 1 is a schematic view of the overall structure of a high stiffness recoverable anchor tube according to an embodiment of the present invention;

FIG. 2 is a schematic view of a detailed structure of a fixing state of a high-rigidity recoverable anchor pipe according to an embodiment of the present invention;

FIG. 3 is a schematic view of the detail structure of the large rigidity recoverable anchor pipe in the exploded state according to the embodiment of the present invention;

fig. 4 is a schematic diagram of a connection structure of a first board and a second board according to an embodiment of the invention.

Reference numerals illustrate:

10. a first splice tube;

11. a first plugboard; 12. bending sections; 13. a buckle;

20. a second splice tube;

21. grouting holes; 22. a grout stopping steel plate; 23. a buckle assembly groove;

30. disassembling and assembling the column;

31. a second plugboard;

40. grouting pipe;

41. a hose; 42. a hard tube;

50. a fitting hole;

51. a shear segment; 52. an anchor section;

60. and (5) vertical piles.

Description of the embodiments

In order to describe the technical content, constructional features, achieved objects and effects of the technical solution in detail, the following description is made in connection with the specific embodiments in conjunction with the accompanying drawings.

Referring to fig. 1 to 4, the present embodiment discloses a large-rigidity recyclable anchor pipe, wherein one end of the large-rigidity recyclable anchor pipe is provided with a vertical pile, and the large-rigidity recyclable anchor pipe comprises a first splicing pipe 10, a first plugboard 11, a second splicing pipe 20, a disassembling and assembling column 30 and a second plugboard 31. One end of the first splicing pipe 10 is connected with a vertical pile 60 (in this embodiment, the vertical pile structure is driven into the soil outside the foundation pit, and in other embodiments, a steel plate may be used as a supporting structure outside the foundation pit). The other end of the first splicing pipe 10 is provided with bending sections 12, the number of the bending sections 12 is more than two, the bending sections 12 are bent towards the central axis direction of the first splicing pipe (in the embodiment, the bending sections 12 adopt a multi-piece structure, gaps are arranged between the bending sections 12, the first splicing pipe is in a structure of bending by taking the prefabricated bending sections of the first splicing pipe as bending, and the bending towards the central direction is realized), and the outer side face of the bending section 12 is provided with a buckle 13. The first plug boards 11 are connected to the inner side surfaces of the bending sections 12 of the first splicing tubes 10, the number of the first plug boards 11 is matched with the number of the bending sections 12, and a gap is formed between every two first plug boards 11. The inner side of one end of the second splicing tube 20 is provided with a buckle assembly groove 23, the size of the buckle assembly groove 23 is matched with the size of the buckle 13, so that the buckle 13 can be fixed in the buckle assembly groove 23, the inner side of the first splicing tube 10 and the inner side of the second splicing tube 20 are communicated, and the second splicing tube 20 is provided with a grouting hole 21 penetrating through the inner side and the outer side. The disassembly column 30 is disposed in the first splice tube 10, and one end of the disassembly column 30 is located at the position of the first plug board 11. The second plug board 31 is connected to one end of the split post 30 facing the bending section 12 of the first splice tube 10, and the size of the second plug board 31 is larger than the gap between the first plug boards 11. The grouting pipe 40 is disposed in the first splice pipe 10 and penetrates the first splice plate 11 to communicate with the second splice pipe 20.

According to the structure, in the assembling process of the high-rigidity recyclable anchor pipe, the assembling hole is formed by driving the variable-aperture drilling machine into the soil of the anchor pipe to be assembled, the shearing resistant section and the anchoring section are sequentially arranged along the driving direction of the drilling machine, and the section size of the anchoring section is larger than that of the shearing resistant section. And then aligning the buckle of the first splicing pipe with the buckle assembly groove of the second splicing pipe, pulling the disassembly column, inserting a second plugboard arranged on the disassembly column into a gap between the first plugboards, and expanding the bending section towards the inner side surface direction of the second splicing pipe by the second plugboard larger than the gap between the first plugboards, inserting the buckle into the buckle assembly groove, and finally, clamping the second plugboard which keeps the disassembly column into the gap between the first plugboards to realize the mutual fixation of the first splicing pipe and the second splicing pipe. And then the first splicing pipe and the second splicing pipe are driven into the assembly hole until the second splicing pipe reaches the anchoring section area of the assembly hole. And then grouting cement mortar into the grouting holes, and enabling the cement mortar to flow along the grouting holes, pass through the first plug board and enter the second splicing pipe. Cement mortar in the second splicing pipe penetrates through the grouting holes and fills the anchoring sections of the assembly holes. After the cement mortar, which is welded to the vertical pile (in this embodiment, the crown beam is provided on the vertical pile, and the first plugboard is welded to the crown beam), is hardened, the anchoring function is started. When the first splicing pipe needs to be disassembled, the connection between the first splicing pipe and the vertical pile is cut off, then the disassembly column is pushed, the second plugboard on the disassembly column is separated from a gap between the first plugboards, the bending section of the first splicing pipe contracts, the buckle is separated from the buckle assembly groove, the first splicing pipe and the disassembly column can be separated from the second splicing pipe, the first splicing pipe and the disassembly column are pulled out, and the recovery of the first splicing pipe and the disassembly column is completed.

Through setting up first splicing pipe and second splicing pipe, the split post is used for removable connection first splicing pipe and second splicing pipe, after the anchor pipe is fixed, rely on the body of first splicing pipe to bear external shearing force, avoided the split post as elastic mechanism to be difficult to separate first splicing pipe and second splicing pipe, and the splicing pipe structure has possessed better shear ability, in the anchoring process, correspond the anchor section of installing downthehole broad through the second splicing pipe, pour cement mortar into, expand the fixed space of second splicing pipe, compare the anchor section fixed by means of frictional force, the required length of fixing has been shortened, make things convenient for first splicing pipe to separate through first plugboard and second plugboard effectively avoided the stock fixed length to surpass the problem of using the red line.

Referring to fig. 2, in some preferred embodiments, the grouting pipe 40 includes a hose 41 and a rigid pipe 42, the rigid pipe 42 is disposed through the first plug board 11, and the hose 41 is in communication with the rigid pipe 42. By providing the hose 41 and the hard tube 42, the length adaptation of the first splice tube 10 of indefinite length is facilitated.

Referring to fig. 2, in some preferred embodiments, the second splice pipe 20 further includes a grout stop steel plate 22, the grout stop steel plate 22 is disposed on an inner side surface of the second splice pipe 20 and separates the fastener assembly groove 23 and the grout hole 21, and the grout pipe 40 penetrates through a panel surface of the grout stop steel plate. In the process of separating the first splicing pipe from the second splicing pipe, the grouting pipe can be pulled out, and the grouting steel plate is pulled out. The grouting pipe is assembled on the first plugboard, and is not interfered with the second plugboard connected with the gap between the first plugboard when being fixed and pulled away. Through setting up the grout stop steel sheet, when cement mortar fills, avoid cement mortar overflow to tear open and close post and bending section region, prevent that removable structure from being locked by cement mortar hardening.

Referring to fig. 2, in some preferred embodiments, the surfaces of the first and second plug boards 11 and 31 are inclined. By arranging the inclined surface, the first plugboard and the second plugboard are convenient to assemble and separate.

Referring to fig. 2, in some preferred embodiments, the grouting holes 21 of the second splice pipe 20 are disposed on the outer side surface of the second splice pipe 20. Through arranging the second splicing pipe grouting holes on the outer side face of the second splicing pipe, the efficiency of injecting cement mortar into the anchoring section is improved, and the blocking probability is reduced.

Referring to FIG. 2, in certain preferred embodiments, the second splice piece 20 has a medial side dimension that matches the lateral side dimension of the first splice piece 10. Through setting up the size of looks adaptation, be convenient for improve the seal of first joint pipe and second joint pipe.

step four, connecting the first splicing pipe with the vertical pile;

and fifthly, waiting for hardening of the concrete to finish assembly.

In addition, the method further comprises a disassembling step:

Construction is carried out by means of the separable anchor pipes, so that shearing resistance and anchoring fixing capacity are guaranteed, and the first spliced pipe is convenient to recycle.

It should be noted that, although the foregoing embodiments have been described herein, the scope of the present invention is not limited thereby. Therefore, based on the innovative concepts of the present invention, alterations and modifications to the embodiments described herein, or equivalent structures or equivalent flow transformations made by the present description and drawings, apply the above technical solution, directly or indirectly, to other relevant technical fields, all of which are included in the scope of the invention.

Claims

1. The high-rigidity recyclable anchor pipe is characterized by comprising a first splicing pipe, a first inserting plate, a second splicing pipe, a disassembling column, a second inserting plate and a grouting pipe;

one end of the first splicing pipe is connected with the vertical pile, the other end of the first splicing pipe is provided with bending sections, the number of the bending sections is more than two, the first splicing pipe is prefabricated into a bending structure and is bent towards the central axis direction of the first splicing pipe, and the outer side face of the bending section is provided with a buckle;

the split column is arranged in the first splicing pipe, so that the first splicing pipe and the second splicing pipe are mutually fixed by pulling the split column, and the split column is pushed to be separated from the second splicing pipe;

the second plugboard is connected to one end of the disassembly column, which faces the bending section of the first splice pipe, and the size of the second plugboard is larger than the gap between the first plugboards;

the grouting pipe is arranged in the first splicing pipe, penetrates through the first inserting plate and is communicated with the second splicing pipe.

2. The high stiffness recoverable anchor according to claim 1, wherein the grouting pipe comprises a hose and a wand, the wand being disposed through the first plug board, the hose being in communication with the wand.

3. The high stiffness recyclable anchor pipe as recited in claim 1, wherein the second splice pipe further comprises a grout stop steel plate disposed on an inner side of the second splice pipe and separating the snap fit groove and the grout hole, the grout pipe penetrating a face of the grout stop steel plate.

4. The high stiffness recoverable anchor according to claim 1, wherein the surfaces of the first and second pinboards are inclined.

5. The high stiffness recoverable anchor tube of claim 1, wherein the grouting holes of the second splice tube are disposed on an outer side of the second splice tube.

6. The high stiffness recoverable anchor pipe of claim 1, wherein the end of the first splice tube is welded to the vertical pile.

7. The high stiffness recoverable anchor according to claim 1, wherein the inner side dimension of the second splice tube is adapted to the outer side dimension of the first splice tube.

8. The construction method of the high-rigidity recyclable anchor pipe is characterized in that a vertical pile is assembled in a construction area, the anchor pipe comprises a first splicing pipe, a second splicing pipe and a disassembling and assembling column which are mutually and detachably connected, a shearing resistant section and an anchoring section are arranged in an assembling hole, and the aperture of the anchoring section is larger than that of the assembling section, and the construction method is characterized by comprising the following steps:

inserting a second plugboard arranged on the split column into a gap between the first plugboards, enabling the second plugboard larger than the gap between the first plugboards to enable the bending section to be unfolded towards the inner side face direction of the second splicing pipe, locking the first splicing pipe and the second splicing pipe by the split column arranged in the first splicing pipe, and driving the anchor pipe into the shearing-resistant section of the assembly hole until the second splicing pipe reaches the anchor section of the assembly hole;

pouring cement mortar into the anchor pipe, enabling the cement mortar to flow along the grouting holes, pass through the first plug board and enter the second splicing pipe until the cement mortar fills the anchoring section on the outer side surface of the second splicing pipe;

step four, connecting the first splicing pipe with the vertical pile;

and fifthly, waiting for hardening of the concrete to finish assembly.

9. The method of constructing a high stiffness recoverable anchor according to claim 8, further comprising the steps of: