CN218030242U - Integrated grouting hollow anchoring rod - Google Patents
Integrated grouting hollow anchoring rod Download PDFInfo
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- CN218030242U CN218030242U CN202220386850.XU CN202220386850U CN218030242U CN 218030242 U CN218030242 U CN 218030242U CN 202220386850 U CN202220386850 U CN 202220386850U CN 218030242 U CN218030242 U CN 218030242U
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- anchor rod
- grouting
- rod
- slip casting
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Abstract
The utility model relates to a hollow anchor rod of integral type slip casting belongs to a slip casting construction tool. The utility model adopts the technical proposal that: the hollow anchor rod of integral type slip casting, this anchor rod are hollow tube structure, and one end is sealed, and the other end is the slip casting mouth, and connecting thread is established to the outer peripheral face of slip casting mouth, and the surface of anchor rod is bored there are a plurality of through-holes, and the through-hole is used for leaking grout, and connecting thread department sets up one-way check valve, one-way check valve's entrance connection inlet pipe. By adopting the integral grouting hollow anchoring rod for grouting, the surrounding rock strength of a shallow rock body is improved, and the mechanical property is improved, so that the anchoring force of the anchoring rod can be obviously improved when the anchor rod is adopted for supporting a roadway, and an effective bearing structure is formed.
Description
Technical Field
The utility model relates to a hollow anchor rod of integral type slip casting belongs to a slip casting construction tool.
Background
With the increase of the coal mining depth and strength, the bottom heave and the roadway side deformation become the frequent dynamic phenomenon of the coal mine roadway, the roadway side deformation and the section after the bottom heave are reduced, the transportation, the pedestrians and the ventilation are blocked, the safety production of the coal mine is directly influenced by the repeated deformation and the bottom heave of some roadways, and the auxiliary level of the great-happy coal mine and the north wing mining area need to arrange a tunneling team to carry out roadway renovation for many times every year.
Aiming at the situation, a lot of coal mines adopt a method of groping and referring to other coal mines for controlling roadway deformation and heaving floor, and the great-rise coal mine auxiliary level and the north wing mining area where the applicant is located adopt a mode of injecting slurry to roadway walls to reinforce the roadway, so that the phenomena of roadway wall deformation and heaving floor are blocked and prolonged. The grouting anchor rod used at present is of a combined structure, the cost is high, and the use cost cannot be reduced when the grouting anchor rod is used in a large scale. And the cement paste of the split structure is easy to leak, and the distribution of the cement paste in the hole is not uniform.
Disclosure of Invention
The invention provides an integrated grouting hollow anchor rod, which solves the problems of grouting and renovation of a roadway and the problems of complex structural installation and high manufacturing cost of a split grouting anchor rod.
In order to achieve the above object, the utility model adopts the following technical scheme:
the hollow anchor rod of integral type slip casting, this anchor rod are hollow tube structure, and one end is sealed, and the other end is the slip casting mouth, and connecting thread is established to the outer peripheral face of slip casting mouth, and the surface of anchor rod is bored there are a plurality of through-holes, and the through-hole is used for leaking the grout, and connecting thread department sets up one-way check valve, one-way check valve's entrance connection inlet pipe.
Preferably, the feeding pipe is connected with a pneumatic grouting pump, the grouting pressure of the pneumatic grouting pump is controlled to be 1.5 to 2.5Mpa, and the cement grade is 52.5#.
Preferably, the anchoring rod is a phi 20 seamless steel pipe, the through holes are divided into five groups, five groups are provided at five cross sections of the anchoring rod, one is provided at each cross section, and the five through holes are arranged in a staggered manner on the circumferential surface of the anchoring rod.
Preferably, a through hole is formed in the grouting opening of the anchor rod, the other end of the through hole is connected into the one-way check valve, the through hole and the fixed rod are detachably connected through connecting threads, and paired parallel surfaces are arranged on the outer surface of the through hole and used for fixing a dismounting tool.
Preferably, the closed end of the anchor rod is a round steel sheet, and the round steel sheet is plugged at the end of the hollow pipe and fixed by welding.
Preferably, the adjacent intervals among the five groups of through holes are uniformly arranged, and the size of the through holes is gradually increased from the grouting port to the closed end.
Preferably, a sealing washer is arranged at the joint of the grouting port which is directly communicated with the anchoring rod, the feeding pipe is a high-pressure hose, and high-pressure cement slurry inside the feeding pipe does not leak.
Compared with a split assembly structure, the utility model can be rapidly installed and used, has simple connection structure and improves the installation efficiency;
redesigned in the through-hole of leaking grout, can avoid grout to leak at the near-end fast, lead to inside mud to pour into insufficient problem, rationally designed the through-hole position, made grout evenly spread in anchor pole a week, avoided the inhomogeneous problem of slip casting pressure.
Adopt the utility model discloses after the slip casting, improved the country rock intensity of shallow rock mass, improved mechanical properties to make the tunnel when adopting anchor bolt support, can show the anchoring force that improves the stock, form effectual bearing structure.
Drawings
Figure 1 is a block diagram of the present invention,
figure 2 is an installation drawing of the utility model in a roadway,
fig. 3 is a schematic view of the connection with the pneumatic grouting pump of the present invention.
Reference numerals: 1 anchor rod 2 slip casting mouth 3 connecting thread 4 through-hole 5 one-way check valve 6 inlet pipe 7 pneumatic grouting pump 8 straight 9 circular steel sheets.
Detailed Description
The following is a detailed description of the specific structure of the present invention:
the utility model discloses hollow anchor rod of integral type slip casting, as shown in FIG. 1, this anchor rod 1 is the hollow tube structure, and one end is sealed, and the other end is slip casting mouth 2, and connecting thread is established to the outer peripheral face of slip casting mouth 2, and anchor rod 1's surface drilling has a plurality of through-holes 4, and through-hole 4 is used for leaking grout, and connecting thread department sets up one-way check valve 5, one-way check valve 5's entrance connection inlet pipe 6.
The hollow anchoring rod is placed into an anchoring hole dug in a roadway, then the cement slurry is injected into the hollow anchoring rod through a grouting hole, the cement slurry leaks from a through hole of the hollow anchoring rod and enters the anchoring hole until the anchoring hole is filled with the cement slurry completely, and grouting operation is completed.
The through holes 4 are divided into five groups, five groups are provided at five sectional positions of the anchor rod 1, one at each sectional position, and the five through holes 4 are arranged alternately on the circumferential surface of the anchor rod 1. Through the through holes which are arranged in a staggered mode, uniform diffusion of cement paste into the anchoring holes is facilitated.
Adjacent intervals among the five groups of through holes 4 are gradually enlarged from the grouting port 2 to the closed end, and the sizes of the through holes 4 are gradually enlarged from the grouting port 2 to the closed end. Mud is big at 2 play pressures of the slip casting mouth of hollow anchor pole, can leak fast to the anchoring hole in, through control through-hole at 2 end grout velocity of flow of slip casting mouth, will be close to the through-hole of slip casting mouth 2 and set up to littleer, the distal end sets up to great to control grout and go out even leakage at every through-hole.
A through hole 8 is formed in the position of a grouting hole 2 of the anchor rod 1, the other end of the through hole 8 is connected into the one-way check valve 5, the through hole 8 and a connecting thread of the fixed rod are detachable, and paired parallel surfaces for fixing a detaching tool are arranged on the outer surface of the through hole 8. After grouting, the one-way check valve 5 needs to be disassembled, and the disassembly is convenient by disassembling the parallel surface.
The anchoring rod 1 is a phi 20 seamless steel pipe, the closed end of the anchoring rod 1 is a circular steel sheet, and the circular steel sheet is plugged at the end of the hollow pipe and fixed by using a welding mode. The joint of the through-channel 8 and the grouting port 2 of the anchoring rod 1 is provided with a sealing gasket, the feeding pipe 6 is a high-pressure hose, and high-pressure cement slurry inside the high-pressure hose does not leak.
The feeding pipe 6 is connected with a pneumatic grouting pump 7, the grouting pressure of the pneumatic grouting pump 7 is controlled to be 1.5-2.5 Mpa, and the cement grade is 52.5#.
The utility model discloses hollow anchor pole of integral type slip casting adopts the preparation of phi 20 seamless steel pipe, and lathe turning silk is used to one end, then cooperation phi 20 is connected the through-hole that directly leads to and one-way check valve is connected, bores the through-hole on the steel pipe for leak the grout.
The pneumatic grouting pump 7 adopts a 2 ZBQ/3 type pneumatic grouting pump with grouting and slurry mixing, and the proportioning concentration of the slurry is as follows: water and cement =0.8, cement number 52.5#, during grouting, the grouting pressure is controlled to be 1.5 to 2.5Mpa, the strictly forbidden pressure exceeds 4Mpa, and the grouting pressure can be determined to be a reasonable working value according to the actual field when the pressure gauge reaches the designed pressure value or the grouting pump displays that the grouting is not performed.
Grouting operation flow: grouting hole → installing and fixing grouting hollow anchoring rod → sealing hole → connecting grouting pump drain pipe and grouting hollow anchoring rod one-way valve → grouting → taking down feed pipe to pressure limit to complete grouting.
The utility model discloses an effect analysis, the utility model discloses supplementary level in colliery and north wing mining area slip casting are the example, from the angle that improves country rock overall structure intensity, have provided and have carried out the slip casting to being protected the tunnel under former supporting conditions and have consolidated, see from the effect of field practice, the adoption of slip casting technique has improved the country rock intensity of shallow rock mass, has improved mechanical properties to make the tunnel when adopting anchor bolt support, can show the anchor power that improves the stock, form effectual bearing structure.
Claims (5)
1. An integrated grouting hollow anchor rod is characterized in that the anchor rod (1) is of a hollow tube structure, one end of the anchor rod is closed, the other end of the anchor rod is a grouting opening (2), connecting threads are arranged on the peripheral surface of the grouting opening (2), a plurality of through holes (4) are drilled in the surface of the anchor rod (1), the through holes (4) are used for leaking cement paste, a one-way check valve (5) is arranged at the connecting threads, and the inlet end of the one-way check valve (5) is connected with a feeding pipe (6);
the anchoring rod (1) is a phi 20 seamless steel pipe, the through holes (4) are divided into five groups, five groups are arranged at five sections of the anchoring rod (1), one is arranged at each section, and the five through holes (4) are arranged on the circumferential surface of the anchoring rod (1) in a staggered manner;
adjacent intervals among the five groups of through holes (4) are uniformly arranged, and the size of the through holes (4) is gradually increased from the grouting port (2) to the closed end.
2. The integrated grouting hollow anchor rod of claim 1, wherein the feeding pipe (6) is connected with a pneumatic grouting pump (7), the grouting pressure of the pneumatic grouting pump (7) is controlled to be 1.5-2.5 MPa, and the cement is 52.5#.
3. The hollow anchor rod of integral type slip casting of claim 1, characterized by, the slip casting mouth (2) position of anchor rod (1) sets up through (8), the one-way check valve (5) of access of the other end of through (8), can dismantle between the connecting thread of through (8) and fixed rod, the surface of through (8) is equipped with the parallel plane in pairs and is used for the fixed of extracting tool.
4. The integrated grouting hollow anchor rod as claimed in claim 3, characterized in that the closed end of the anchor rod (1) is a round steel sheet which is blocked at the end of the hollow tube and fixed by welding.
5. The hollow anchor rod of integral type slip casting of claim 3, characterized by, the grout mouth (2) junction of through (8) and anchor rod (1) is equipped with seal ring, the feed pipe (6) is the high pressure hose, and inside high pressure cement paste does not leak.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220386850.XU CN218030242U (en) | 2022-02-25 | 2022-02-25 | Integrated grouting hollow anchoring rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220386850.XU CN218030242U (en) | 2022-02-25 | 2022-02-25 | Integrated grouting hollow anchoring rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218030242U true CN218030242U (en) | 2022-12-13 |
Family
ID=84339179
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220386850.XU Active CN218030242U (en) | 2022-02-25 | 2022-02-25 | Integrated grouting hollow anchoring rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218030242U (en) |
-
2022
- 2022-02-25 CN CN202220386850.XU patent/CN218030242U/en active Active
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