CN112253201B - Prestressed anchor rod with grouting and grout stopping device and using method thereof - Google Patents
Prestressed anchor rod with grouting and grout stopping device and using method thereof Download PDFInfo
- Publication number
- CN112253201B CN112253201B CN202011323383.8A CN202011323383A CN112253201B CN 112253201 B CN112253201 B CN 112253201B CN 202011323383 A CN202011323383 A CN 202011323383A CN 112253201 B CN112253201 B CN 112253201B
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- Prior art keywords
- anchor rod
- elastic gasket
- grouting
- hollow
- prestressed
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- 239000011440 grout Substances 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims description 15
- 239000007788 liquid Substances 0.000 claims abstract description 52
- 229920000742 Cotton Polymers 0.000 claims description 9
- 238000005553 drilling Methods 0.000 claims description 8
- 239000002002 slurry Substances 0.000 claims description 7
- 229920001971 elastomer Polymers 0.000 claims description 6
- 239000011435 rock Substances 0.000 claims description 4
- 238000007569 slipcasting Methods 0.000 abstract description 36
- 238000010276 construction Methods 0.000 description 6
- 230000018109 developmental process Effects 0.000 description 3
- 230000004323 axial length Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229920005549 butyl rubber Polymers 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/008—Anchoring or tensioning means
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention provides a prestressed anchor rod with a grouting and grout stopping device, which comprises a hollow anchor rod and a tray, wherein the tray is sleeved on the hollow anchor rod and is used for plugging a gap between the hollow anchor rod and an anchor rod hole; be provided with on the cavity stock and end the thick liquid device, end the thick liquid device and include the elastic gasket, the elastic gasket cover is established on the cavity stock, when the slip casting liquid falls on the elastic gasket, the elastic gasket takes place to warp and passes through for the slip casting liquid, when the slip casting liquid is filled to the below of elastic gasket, the elastic gasket resumes deformation in order to prevent slip casting liquid rethread elastic gasket. The periphery of the hollow anchor rod is provided with the elastic gasket, so that the grouting fullness of the anchor rod on the cave depot dome can be ensured, and the primary support quality of the prestressed anchor rod of the cave depot dome is ensured.
Description
Technical Field
The invention belongs to the technical field of prestressed anchors, and particularly relates to a prestressed anchor with a grouting and grout stopping device and a using method thereof.
Background
With the rapid development of economy in China, the construction pace of infrastructure is accelerated, the development and utilization of underground space are increased, and the construction of underground cave depots is also a part of the development and utilization of the underground space and is often used as reserve resources. The method has the characteristics of large span, large volume, complex structural profile and the like, the grouting construction of the dome anchor rod is the key point of the initial support quality of the cave depot, the function of protecting the anchor rod from being corroded is achieved, and the fullness degree of the grouting of the dome anchor rod is one of important indexes influencing the initial support quality. If the stock slip casting is not full, have great potential safety hazard when making the cave depot strut.
Therefore, in order to solve the problems of the grouting construction of the prestressed anchor rod for the dome of the large underground cave depot, an improved technical scheme aiming at the defects of the prior art needs to be provided.
Disclosure of Invention
The invention aims to provide a prestressed anchor rod with a grouting and grout stopping device and a using method thereof, so as to at least solve the problems of insufficient grouting of the existing anchor rod and the like.
In order to achieve the above purpose, the invention provides the following technical scheme:
the prestressed anchor rod with the grouting and grout stopping device comprises a hollow anchor rod and a tray, wherein the tray is sleeved on the hollow anchor rod and is used for plugging a gap between the hollow anchor rod and an anchor rod hole;
be provided with on the cavity stock and end the thick liquid device, it includes the elastic gasket to end the thick liquid device, the elastic gasket cover is established on the cavity stock, when the slip casting liquid falls on the elastic gasket, the elastic gasket takes place to warp and passes through for the slip casting liquid, works as when the slip casting liquid is filled to the below of elastic gasket, the elastic gasket resumes deformation in order to prevent slip casting liquid rethread elastic gasket.
The prestressed anchor rod with grouting and grout stopping device as described above, preferably, the elastic gasket is ring-shaped, the inner ring diameter of the elastic gasket is equal to the outer diameter of the hollow anchor rod, and the outer ring diameter of the elastic gasket is greater than or equal to the inner diameter of the anchor rod hole.
The prestressed anchor rod with the grouting and grout stopping device is preferably made of rubber.
The prestressed anchor rod with grouting and grout stopping device as described above, preferably, the grout stopping device further includes an upper fixing member and a lower fixing member, the upper fixing member and the lower fixing member are fixed on the hollow anchor rod, the upper fixing member is located above the elastic gasket and abuts against the elastic gasket for limiting the elastic gasket from moving upwards, and the lower fixing member is located below the elastic gasket and abuts against the elastic gasket for limiting the elastic gasket from moving downwards.
The prestressed anchor rod with grouting slurry stopping device is preferably arranged in the range of 1/3 to 2/3 of the length of the anchor rod in the axial direction.
The prestressed anchor rod with grouting and grout stopping device as described above, preferably, the upper fixing member and the lower fixing member are both nuts, and both the upper fixing member and the lower fixing member are in threaded fit with the hollow anchor rod, so as to adjust the position of the grouting and grout stopping device on the hollow anchor rod.
The prestressed anchor rod with grouting and grout stopping device as described above is preferably provided with cotton on the tray, and the cotton is used for preventing grout leakage.
The prestressed anchor rod with grouting and grout stopping device as described above is preferably provided with at least one grout stopping device along the axial direction of the hollow anchor rod.
The invention also provides a use method of the prestressed anchor rod with the grouting and grout stopping device, which uses the prestressed anchor rod with the grouting and grout stopping device, and comprises the following steps:
step S1, drilling an anchor rod hole on a cave depot dome by using a drilling machine, wherein the axial direction of the anchor rod hole is vertical to the tangent plane of the cave depot dome where the anchor rod hole is positioned;
s2, assembling a prestressed anchor rod, installing a grout stopping device on the hollow anchor rod, and installing a tray at the end part of the hollow anchor rod;
s3, inserting the assembled prestressed anchor into the anchor hole, plugging the port of the anchor hole by using cotton, and fixing the tray close to the rock surface of the cave depot dome to prevent slurry leakage;
and S4, installing a ball valve and a grouting pipe at the port position of the hollow anchor rod, grouting the prestressed anchor rod from bottom to top through the grouting pipe, and stopping grouting after the prestressed anchor rod and the anchor rod hole are filled with grout.
In the method for using the prestressed anchor rod with a grouting slurry stop device, preferably, in the step S2, the slurry stop device is installed within a range of 1/3 to 2/3 of the length of the hollow anchor rod in the axial direction, an upper fixing member, an elastic gasket and a lower fixing member are sequentially sleeved on the hollow anchor rod, the upper fixing member and the lower fixing member are in threaded connection with the hollow anchor rod, and the elastic gasket is clamped by the upper fixing member and the lower fixing member so as to be fixed on the hollow anchor rod.
Compared with the closest prior art, the technical scheme provided by the invention has the following excellent effects:
according to the invention, the elastic gasket is arranged on the prestressed anchor rod, the elastic gasket is made of rubber, and by utilizing the elasticity of rubber, when the grouting liquid below the elastic gasket is not full, the elastic gasket can be bent and deformed by the dead weight of the grouting liquid, so that the grouting liquid falls below the elastic gasket, and the anchor rod hole space below the elastic gasket is filled. Then the slip casting liquid below the elastic gasket plays a supporting role for the elastic gasket, when the slip casting liquid falls on the elastic gasket again, the slip casting liquid can not pass through the elastic gasket, and the elastic gasket plays a role in preventing the slip casting liquid from passing through until the space of the anchor rod hole above the elastic gasket is filled with the slip casting liquid. This application also sets up the elastic gasket in the periphery of cavity stock, can guarantee the stock slip casting plumpness on the cave depot dome, has guaranteed the preliminary supporting quality of the prestressed anchorage pole of cave depot dome.
And set up the elastic gasket in cavity stock periphery, increased the area of contact of cavity stock with the slip casting liquid, after the slip casting liquid solidifies, the elastic gasket is also fixed in the slip casting liquid, has strengthened the joint strength of cavity stock with the slip casting liquid for the prestressed anchorage pole after the slip casting solidification has better structural strength.
The elastic gasket in this application is pressed from both sides through upper and lower mounting and is fixed in the periphery of cavity stock tightly, and upper and lower mounting and cavity stock threaded connection for the thick liquid device that ends that upper and lower mounting and elastic gasket formed can carry out position control on the axial direction of cavity stock, thereby can be according to cave storehouse actual demand, and the position of thick liquid device on the cavity stock is only stopped in the adjustment.
The elastic gasket material in this application is rubber, can adopt the tire inner bag, uses discarded tire inner bag, can change waste into valuables, and low cost is favorable to the construction.
Drawings
FIG. 1 is a schematic view of a prestressed anchor rod connecting grouting pipe with a grouting stop device according to the invention;
fig. 2 is a schematic view of the prestressed anchor rod with a grouting and grout stopping device of the invention installed on a cave depot dome.
In the figure: 1. a grouting pipe; 2. a ball valve; 3. a hollow anchor rod; 4. a tray; 5. cotton; 6. a lower fixing member; 7. an elastic pad; 8. an upper fixing member; 9. an anchor rod hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, which are merely for convenience of description of the present invention and do not require that the present invention must be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. The terms "connected" and "connected" used herein should be interpreted broadly, and may include, for example, a fixed connection or a detachable connection; they may be directly connected or indirectly connected through intermediate members, and specific meanings of the above terms will be understood by those skilled in the art as appropriate.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.
According to the specific embodiment of the present invention, as shown in fig. 1, the present invention provides a prestressed anchor rod, comprising a hollow anchor rod 3 and a tray 4, wherein the tray 4 is sleeved on the hollow anchor rod 3, and the tray 4 is used for plugging a gap between the hollow anchor rod 3 and an anchor rod hole 9; be provided with on cavity stock 3 and end the thick liquid device, it includes elastic gasket 7 to end the thick liquid device, elastic gasket 7 cover is established on cavity stock 3, when the slip casting liquid falls on elastic gasket 7, elastic gasket 7 takes place to warp and passes through for the slip casting liquid, when the slip casting liquid is filled in to the below of elastic gasket 7, elastic gasket 7 resumes deformation in order to prevent slip casting liquid rethread elastic gasket 7, the space is full of by the slip casting liquid until anchor rod hole 9 of elastic gasket 7 top, the slip casting plumpness of the prestressed anchorage pole on the cave depot dome has been guaranteed, and then the preliminary quality of strutting of the prestressed anchorage pole of cave depot dome has been guaranteed. And set up elastic gasket 7 in the periphery of cavity stock 3, increased the area of contact of cavity stock 3 with the slip casting liquid for the prestressed anchorage pole after the slip casting solidifies has better structural strength.
The elastic gasket 7 is annular, the diameter of the inner ring of the elastic gasket 7 is equal to the outer diameter of the hollow anchor rod 3, and the diameter of the outer ring of the elastic gasket 7 is larger than or equal to the inner diameter of the anchor rod hole 9. In this embodiment, the outer diameter of the hollow anchor 3 is Φ 25mm, and the length of the hollow anchor 3 is 4.5m. The elastic gasket 7 is made of rubber, the elastic gasket 7 can be made of a tire inner tube (namely butyl rubber), and the tire inner tube is low in cost and beneficial to construction. The inner diameter of the elastic gasket 7 is phi 25mm, and the outer diameter thereof is phi 55mm.
The grout stopping device further comprises an upper fixing piece 8 and a lower fixing piece 6, the upper fixing piece 8 and the lower fixing piece 6 are fixed on the hollow anchor rod 3, the upper fixing piece 8 is located above the elastic gasket 7 and is abutted to the elastic gasket 7 to limit the upward movement of the elastic gasket 7, and the lower fixing piece 6 is located below the elastic gasket 7 and is abutted to the elastic gasket 7 to limit the downward movement of the elastic gasket 7.
Go up mounting 8 and lower mounting 6 and be the nut, go up mounting 8 and lower mounting 6 and all with 3 screw-thread fit of cavity stock to adjust the position of only thick liquid device on cavity stock 3. The grout stop device is arranged in the range of 1/3 to 2/3 of the length of the anchor rod in the axial direction. Therefore, the position of the grout stopping device on the hollow anchor rod 3 can be adjusted according to the actual requirements of the cave depot. The tray 4 is provided with cotton 5, and the cotton 5 is used for preventing pulp leakage.
In this embodiment, only one grout making device is arranged on the hollow anchor rod, in other embodiments, at least one grout stopping device is arranged in the axial direction of the hollow anchor rod, that is, a plurality of elastic gaskets 7 such as 1, 2, 3 … and the like can be arranged on the hollow anchor rod in parallel, so that the anchor rod hole 9 is divided into a plurality of sections of spaces, and the plurality of sections of spaces of the anchor rod hole 9 are filled from bottom to top in sequence, thereby ensuring the fullness of grouting of the prestressed anchor rod.
The application also provides a use method of the prestressed anchor rod with the grouting and grout stopping device, the use method uses the prestressed anchor rod with the grouting and grout stopping device, and the use method comprises the following steps:
step S1, drilling an anchor rod hole 9 on a cave depot dome by using a drilling machine, wherein the drilling machine is a YT28 type rock drilling machine; the axial direction of the anchor rod hole 9 is vertical to the tangent plane of the cave depot dome where the anchor rod hole 9 is positioned, the axial length of the anchor rod hole 9 is 4.5m, and the diameter of the anchor rod hole 9 is phi 50mm.
S2, assembling a prestressed anchor rod, installing a grout stopping device on the hollow anchor rod 3, and installing a tray 4 at the end part of the hollow anchor rod 3; specifically, the grout stopping device is arranged in the length range of 1/3 to 2/3 of the hollow anchor rod 3 in the axial direction, an upper fixing piece 8, an elastic gasket 7 and a lower fixing piece 6 are sequentially sleeved on the hollow anchor rod 3, the upper fixing piece 8 and the lower fixing piece 6 are nuts with the same specification, and the specification of the nuts is M24; the upper fixing piece 8 and the lower fixing piece 6 are in threaded connection with the hollow anchor rod 3, and the elastic gasket 7 is clamped through the upper fixing piece 8 and the lower fixing piece 6 so as to fix the elastic gasket 7 on the hollow anchor rod 3.
And S3, inserting the assembled pre-stressed anchor rod into the anchor rod hole 9, blocking the port of the anchor rod hole 9 by using cotton 5, and fixing the tray 4 in close contact with the rock surface of the cave depot dome to prevent grout leakage.
And S4, installing a ball valve 2 and a grouting pipe 1 at the port position of the hollow anchor rod 3, grouting the prestressed anchor rod from bottom to top through the grouting pipe 1, bending and deforming an elastic gasket 7 in the middle of the anchor rod by grouting liquid, filling the grouting liquid into an anchor rod hole 9 below the elastic gasket 7, preventing the grouting liquid from passing through the elastic gasket 7, filling the anchor rod hole 9 above the elastic gasket 7, and stopping grouting after the prestressed anchor rod and the anchor rod hole 9 are filled with the grouting liquid.
In summary, according to the technical scheme of the prestressed anchor rod with the grouting stop device and the use method thereof provided by the invention, the elastic gasket is installed on the prestressed anchor rod, and when the grouting liquid below the elastic gasket is not full, the elastic gasket can be bent and deformed by the self weight of the grouting liquid, so that the grouting liquid falls below the elastic gasket, and the anchor rod hole space below the elastic gasket is filled. Then the slip casting liquid below the elastic gasket plays a supporting role for the elastic gasket, when the slip casting liquid falls on the elastic gasket again, the elastic gasket plays a role in preventing the slip casting liquid from passing through until the space of the anchor rod hole above the elastic gasket is filled with the slip casting liquid, so that the prestressed anchor rod on the cave depot dome has better slip casting plumpness, and the primary support quality of the prestressed anchor rod of the cave depot dome is ensured.
And set up the elastic gasket in cavity stock periphery, increased the area of contact of cavity stock with the slip casting liquid, strengthened the joint strength of cavity stock with the slip casting liquid for the prestressed anchorage pole after the slip casting solidifies has better structural strength.
The upper fixing piece and the lower fixing piece are in threaded connection with the hollow anchor rod, so that the grout stopping device formed by the upper fixing piece and the lower fixing piece and the elastic gasket can be adjusted in position in the axial direction of the hollow anchor rod, and the position of the grout stopping device on the hollow anchor rod can be adjusted according to actual requirements of a cave depot.
The above description is intended to be illustrative of the preferred embodiment of the present invention and should not be taken as limiting the invention, but rather, the invention is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. The prestressed anchor rod with the grouting and grout stopping device is characterized by comprising a hollow anchor rod and a tray, wherein the tray is sleeved on the hollow anchor rod and is used for plugging a gap between the hollow anchor rod and an anchor rod hole;
the hollow anchor rod is provided with a grout stopping device, the grout stopping device comprises an elastic gasket, the elastic gasket is sleeved on the hollow anchor rod, when grouting liquid falls on the elastic gasket, the elastic gasket deforms to allow the grouting liquid to pass through, and when the lower part of the elastic gasket is filled with the grouting liquid, the elastic gasket recovers to deform to prevent the grouting liquid from passing through the elastic gasket;
the grout stopping device further comprises an upper fixing piece and a lower fixing piece, the upper fixing piece is fixed to the lower fixing piece on the hollow anchor rod, the upper fixing piece is located above the elastic gasket and abutted to the elastic gasket to limit upward movement of the elastic gasket, and the lower fixing piece is located below the elastic gasket and abutted to the elastic gasket to limit downward movement of the elastic gasket.
2. The prestressed anchor bolt with grouting stop device of claim 1, wherein said elastic pad is ring-shaped, the inner ring diameter of said elastic pad is equal to the outer diameter of said hollow anchor bolt, and the outer ring diameter of said elastic pad is equal to or greater than the inner diameter of the anchor bolt hole.
3. The prestressed anchor rod with grouting stop device as claimed in claim 1, wherein said elastic pad is made of rubber.
4. The prestressed anchor bolt with grouting stop device as claimed in claim 1, wherein said grouting stop device is disposed within a range of 1/3 to 2/3 of the length of the hollow anchor bolt in the axial direction.
5. The prestressed anchor bolt with grouting slurry stopping device as claimed in claim 1, wherein said upper fixing member and said lower fixing member are nuts, and said upper fixing member and said lower fixing member are screw-engaged with said hollow anchor rod to adjust the position of said slurry stopping device on said hollow anchor rod.
6. The prestressed anchorage bar with grouting and grout stopping device as claimed in any one of claims 1 to 3, wherein cotton is placed on said tray for preventing grout leakage.
7. A prestressed anchor with grouting stop devices according to any one of claims 1-3, wherein at least one of said stop devices is arranged in the axial direction of said hollow anchor.
8. Use method of a prestressed anchor with grouting and grout stopping device, characterized in that the use method is the prestressed anchor with grouting and grout stopping device according to any one of claims 1-7, and the use method comprises the following steps:
step S1, drilling an anchor rod hole on a cave depot dome by using a drilling machine, wherein the axial direction of the anchor rod hole is vertical to the tangent plane of the cave depot dome where the anchor rod hole is positioned;
s2, assembling a prestressed anchor rod, installing a grout stopping device on the hollow anchor rod, and installing a tray at the end part of the hollow anchor rod;
s3, inserting the assembled prestressed anchor into the anchor hole, plugging the port of the anchor hole by using cotton, and fixing the tray close to the rock surface of the cave depot dome to prevent slurry leakage;
and S4, installing a ball valve and a grouting pipe at the port position of the hollow anchor rod, grouting the prestressed anchor rod from bottom to top through the grouting pipe, and stopping grouting after the prestressed anchor rod and the anchor rod hole are filled with grout.
9. The method as claimed in claim 8, wherein the step S2 is specifically that the grout stopping device is installed within a range of 1/3 to 2/3 of the length of the hollow anchor rod in the axial direction, an upper fixing member, an elastic gasket and a lower fixing member are sequentially sleeved on the hollow anchor rod, the upper fixing member and the lower fixing member are in threaded connection with the hollow anchor rod, and the elastic gasket is clamped by the upper fixing member and the lower fixing member to fix the elastic gasket on the hollow anchor rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011323383.8A CN112253201B (en) | 2020-11-23 | 2020-11-23 | Prestressed anchor rod with grouting and grout stopping device and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011323383.8A CN112253201B (en) | 2020-11-23 | 2020-11-23 | Prestressed anchor rod with grouting and grout stopping device and using method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112253201A CN112253201A (en) | 2021-01-22 |
| CN112253201B true CN112253201B (en) | 2023-01-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011323383.8A Active CN112253201B (en) | 2020-11-23 | 2020-11-23 | Prestressed anchor rod with grouting and grout stopping device and using method thereof |
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| CN (1) | CN112253201B (en) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2047721U (en) * | 1989-06-28 | 1989-11-15 | 冶金工业部建筑研究总院 | Light anchor bolts of quick-hardening cement and their installment connector |
| CN2934360Y (en) * | 2006-07-31 | 2007-08-15 | 成都现代万通锚固技术有限公司 | Self-propelling flexible anchoring-bolt |
| CN102704969B (en) * | 2012-06-25 | 2014-08-20 | 中国矿业大学 | Recoverable anchor rod for drilling, anchoring and grouting and supporting method thereof |
| CN104975594B (en) * | 2015-06-17 | 2017-07-25 | 中国矿业大学 | A kind of Grouting Pipe and construction method for miscellaneous fill stratum |
| CN205135681U (en) * | 2015-11-10 | 2016-04-06 | 山东科技大学 | Flexible pin locking formula stock |
| CN105604593B (en) * | 2016-03-17 | 2018-05-04 | 天津大学 | A kind of three stages anchoring Combined hollow grouted anchor bar |
| CN106759325A (en) * | 2017-03-20 | 2017-05-31 | 北京中岩大地科技股份有限公司 | A kind of many enlarged footing jet grouting anchor rod rod devices of cloth-bag type and its construction method |
| CN109083666B (en) * | 2018-07-19 | 2021-02-02 | 贵州磷镁材料有限公司 | Grouting anchor rod structure and construction method thereof |
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2020
- 2020-11-23 CN CN202011323383.8A patent/CN112253201B/en active Active
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