CN115539103A - High-stability grouting anchor rod for large-section roadway - Google Patents
High-stability grouting anchor rod for large-section roadway Download PDFInfo
- Publication number
- CN115539103A CN115539103A CN202211297610.3A CN202211297610A CN115539103A CN 115539103 A CN115539103 A CN 115539103A CN 202211297610 A CN202211297610 A CN 202211297610A CN 115539103 A CN115539103 A CN 115539103A
- Authority
- CN
- China
- Prior art keywords
- anchor rod
- grouting
- anchor
- rod body
- elastic membrane
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000012528 membrane Substances 0.000 claims abstract description 27
- 238000009434 installation Methods 0.000 claims abstract description 9
- 238000007569 slipcasting Methods 0.000 claims description 25
- 230000006835 compression Effects 0.000 claims description 15
- 238000007906 compression Methods 0.000 claims description 15
- 230000000694 effects Effects 0.000 claims description 8
- 239000011440 grout Substances 0.000 claims description 6
- 238000010030 laminating Methods 0.000 claims description 3
- 239000011435 rock Substances 0.000 abstract description 15
- 239000004570 mortar (masonry) Substances 0.000 description 13
- 238000005553 drilling Methods 0.000 description 8
- 238000010276 construction Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Images
Classifications
-
- 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
- E21D20/021—Grouting with inorganic components, e.g. cement
-
- 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
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)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a high-stability grouting anchor rod of a large-section roadway, which comprises an anchor rod body, wherein the anchor rod body is of a hollow structure, a plurality of grouting holes are uniformly formed in the anchor rod body along the length direction, a guide head is arranged at one end of the anchor rod body, and a grouting opening is formed in the other end of the anchor rod body; the anchor rod comprises an anchor rod body and is characterized in that a plurality of fixing devices are arranged in the anchor rod body, the fixing devices are uniformly arranged along the length direction of the anchor rod body, each fixing device comprises an arc-shaped elastic membrane, the elastic membrane is bent towards the center of the anchor rod, the edge of the elastic membrane is fixedly connected to the inner wall of the anchor rod body, the elastic membrane and the inner wall of the anchor rod body jointly enclose an installation space, an anchor nail is arranged in the installation space, the anchor nail is fixedly connected to the elastic membrane and is arranged perpendicular to the inner wall of the anchor rod body, and a through hole for the anchor nail to pass through is formed in the inner wall of the anchor rod body; the grouting anchor rod is used for solving the problem that the stability of a grouting anchor rod for fixing a rock body cannot be guaranteed in the prior art.
Description
Technical Field
The invention relates to the technical field of roadway anchor rods, in particular to a high-stability grouting anchor rod for a large-section roadway.
Background
The grouting anchor rod is a tension member driven into a rock mass, one end of the grouting anchor rod is connected with a supporting structure, and the other end of the grouting anchor rod extends into the rock mass to be stressed together with the rock mass, so that the grouting anchor rod is widely applied to tunnel engineering. In order to ensure the firmness of the anchor rod, the existing grouting anchor rod is roughly divided into two types, one type is that barbs are adopted, grouting pressure is utilized to enable barb structures to be unfolded, the anchor rod is difficult to be separated from the rock body, and therefore the firmness of the anchor rod is improved. The other type is a bag type grouting anchor rod, the expansion space of a bag needs to be reserved during drilling, the expansion space needs to be completely matched with the size of the bag after grouting, a good firm effect can be achieved, accurate calculation and operation are needed, and the construction requirement is high.
Disclosure of Invention
The invention aims to provide a high-stability grouting anchor rod for a large-section roadway, which is used for solving the problem that the stability of a grouting anchor rod for fixing a rock body in the prior art cannot be ensured.
In order to achieve the purpose, the invention adopts the following technical scheme: a high-stability grouting anchor rod of a large-section roadway comprises an anchor rod body, wherein the anchor rod body is of a hollow structure, a plurality of grouting holes are uniformly formed in the anchor rod body along the length direction, a guide head is arranged at one end of the anchor rod body, and a grouting opening is formed in the other end of the anchor rod body; the inside of stock body is provided with a plurality of fixing device, fixing device evenly sets up along the length direction of stock body, fixing device includes curved elastic membrane, elastic membrane is crooked to the stock center, the edge fixed connection of elastic membrane is on the inner wall of stock body, elastic membrane encloses into installation space with stock body inner wall jointly, be provided with the anchor nail in the installation space, anchor nail fixed connection just is perpendicular to stock body inner wall setting on elastic membrane, be provided with the through-hole that supplies the anchor nail to pass on the inner wall of stock body.
Optionally, grout gate department is provided with closing device, and closing device sets up inside the stock body, and closing device includes spacing ring and limiting plate, and spacing ring fixed connection is on the inner wall of stock body, and the limiting plate laminating is in grout gate department, evenly is provided with a plurality of compression spring between spacing ring and the limiting plate, and under compression spring's effect, the limiting plate compresses tightly on the grout gate.
Optionally, the limiting rings at the two ends of the compression spring and the limiting plate are both provided with limiting grooves, the limiting grooves on the limiting rings and the limiting grooves on the limiting plate are arranged oppositely, and the two ends of the compression spring are placed in the limiting grooves.
Optionally, the inner wall of the bolt body is of a double-layer structure.
Optionally, the arrangement of the fixation device within the bolt body is in the form of a double helix.
Optionally, a fixing plate is arranged between the anchor and the elastic membrane, and the anchor is fixedly connected to the fixing plate.
Optionally, two anchors are fixedly connected to each fixing plate.
Optionally, the elastic membrane is made of rubber.
The high-stability grouting anchor rod for the large-section roadway has the following advantages:
(1) When the stock gos deep into the inside back of rock mass and begins the slip casting, under the effect of slip casting pressure, the pointed end of anchor can be very easy in the insertion rock mass, through the tensile strength of radial fixed improvement stock, can fill up the drilling from the mortar of slip casting mouth outflow to make the fixed of stock more stable.
(2) The closing device can be opened under the pressure of slip casting, makes inside the mortar can enter into the stock body, when stopping slip casting, under compression spring's effect, the limiting plate can automatic shutoff slip casting mouth, makes the mortar can not follow this internal outflow of stock, is applicable to on the stock that upwards sets up.
(3) Bilayer structure can improve the intensity of stock body, appears deformation when avoiding drilling, influences the stock intensity after follow-up slip casting process and the slip casting.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic structural view of the sealing device.
Fig. 3 is a schematic view of the structure of the fixing device.
Figure 4 is a schematic illustration of the connection of the rock bolt to the rock mass.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1-2, a high stability slip casting stock in big section tunnel, including stock body 1, stock body 1 is hollow structure, and stock body 1 evenly is provided with a plurality of slip casting holes 2 along length direction, and the mortar can be poured into the outside of stock body 1 through slip casting hole 2, fills the space between stock and the drilling, fills the mortar after, and the mortar is outwards wrapped up stock body 1 from inside, improves the intensity and the corrosion resistance of stock. The front end of the anchor rod body 1 is provided with a guide head 3, the guide head 3 is used for drilling holes into a rock body, the tail end of the anchor rod body 1 is provided with a grouting opening 4, and the grouting opening 4 is connected with a grouting pipeline. The department of slip casting mouth 4 is provided with closing device 5, and closing device 5 sets up inside anchor rod body 1, and closing device 5 includes limiting plate 7 and spacing ring 8, and 8 fixed connection of spacing ring are on the inner wall of anchor rod body 1, and 7 laminating of limiting plate are in slip casting mouth 4 departments, evenly are provided with a plurality of compression spring 9 between spacing ring 8 and the limiting plate 7, and under compression spring 9's effect, limiting plate 7 compresses tightly on slip casting mouth 4. Limiting grooves 10 are formed in the limiting rings 8 and the limiting plates 7 at the two ends of the compression spring 9, the limiting grooves 10 in the limiting rings 8 are opposite to the limiting grooves 10 in the limiting plates 7, and the two ends of the compression spring 9 are placed in the limiting grooves 10, so that the compression spring 9 and the limiting plates 7 are convenient to install. Under the normal state, under the action of the compression spring 9, the limiting plate 7 can block the grouting port 4; when the slip casting, limiting plate 7 is backed up to the pressure of slip casting, makes inside the mortar can enter into stock body 1, when stopping slip casting after stock body 1 is filled with the mortar, limiting plate 7 automatic shutoff slip casting mouth 4 again makes the mortar can not flow out in the stock body 1. Sealing device 5 is applicable to on the stock that upwards sets up, especially when big sectional tunnel construction, the stock that the supporting construction at tunnel top need upwards be squeezed into in a large number, and does not set up sealing device 5 on the conventional slip casting stock, leads to needing other measures to carry out the shutoff to the stock after the slip casting, and the operation is complicated, and the condition that the mortar leaked appears easily moreover, influences the fixed effect of the holistic slip casting of stock.
As shown in fig. 3-4, the inner wall of the anchor rod body 1 is of a double-layer structure, the double-layer structure can improve the strength of the anchor rod body 1, and deformation is avoided during drilling, so that the subsequent grouting process and the strength of the anchor rod after grouting are affected. The inside of stock body 1 is provided with a plurality of fixing device 6, and fixing device 6 evenly sets up along the length direction of stock body 1, and fixing device 6 includes curved elastic membrane 11, and elastic membrane 11 adopts the rubber material, and elastic membrane 11 is crooked to the stock center, and the edge fixed connection of elastic membrane 11 is on the inner wall of stock body 1, and elastic membrane 11 encloses into installation space 12 with 1 inner wall of stock body jointly. An anchor 13 is arranged in the installation space 12, the anchor 13 is fixedly connected to the elastic membrane 11 through a fixing plate 14 and is perpendicular to the inner wall of the anchor rod body 1, and a through hole 15 for the anchor 13 to pass through is arranged on the inner wall of the anchor rod body 1. When no external force is applied, the elastic membrane 11 is bent inwards, so that the anchor 13 is positioned in the installation space 12, the anchor 13 cannot penetrate out of the through hole 15, and the drilling process of the anchor rod cannot be influenced; when the anchor rod reaches a certain depth, mortar is injected into the anchor rod body 1, the end part of the anchor bolt 13 is located in the through hole 15, and the through hole 15 can limit the movement of the anchor bolt 13, so that the anchor bolt 13 cannot be dislocated in the length direction of the anchor rod body 1 under the action of mortar pressure, and the anchor bolt 13 extends outwards and is inserted into a rock body under the condition that the grouting pressure extrudes the elastic membrane 11 outwards to form a radial tensile structure. Two anchors 13 are fixedly connected to each fixing plate 14, the tensile property of the single point of the anchor rod is improved, the fixing device 6 is of a double-spiral structure in the overall arrangement mode in the anchor rod body 1, and the tensile property of the overall anchor rod is improved.
Under the effect of slip casting pressure, inside anchor 13 inserted the rock mass, the whole structure that is the T type of anchor rod, anchor rod and rock mass joint strength improve greatly, and the pulling force that the anchor rod can bear promotes, and inside the tip of anchor 13 was sharp column structure moreover, can pierce the rock mass easily, the barb structure can not appear and extend the incomplete condition, so can strut the top in big section tunnel and provide stable support. Anchor rod body 1 runs through whole drilling, and anchor rod body 1 can be wrapped up completely to mortar behind the slip casting, and anchor rod body 1 is equivalent to the strengthening rib, can improve the performance of anchor rod shearing resistance greatly. The sealing device 5 can automatically seal the grouting opening 4, simplifies partial operation of the grouting process, greatly reduces labor intensity and is beneficial to improving the efficiency of roadway construction.
The embodiments described above are only a part of the embodiments of the present invention, and not all of them. All other embodiments that can be obtained by a person skilled in the art based on the embodiments of the present invention without any creative effort belong to the protection scope of the present invention.
Claims (8)
1. The utility model provides a high stability slip casting stock in big section tunnel which characterized in that: the anchor rod comprises an anchor rod body, wherein the anchor rod body is of a hollow structure, a plurality of grouting holes are uniformly formed in the anchor rod body along the length direction, a guide head is arranged at one end of the anchor rod body, and a grouting opening is formed in the other end of the anchor rod body; the inside of stock body is provided with a plurality of fixing device, fixing device evenly sets up along the length direction of stock body, fixing device includes curved elastic membrane, elastic membrane is crooked to the stock center, the edge fixed connection of elastic membrane is on the inner wall of stock body, elastic membrane encloses into installation space with stock body inner wall jointly, be provided with the anchor nail in the installation space, anchor nail fixed connection just is perpendicular to stock body inner wall setting on elastic membrane, be provided with the through-hole that supplies the anchor nail to pass on the inner wall of stock body.
2. The high stability grouting anchor rod of a large cross section roadway of claim 1, wherein: grout mouthful department is provided with closing device, and closing device sets up inside the stock body, and closing device includes spacing ring and limiting plate, and spacing ring fixed connection is on the inner wall of stock body, and the limiting plate laminating is in grout mouthful department, evenly is provided with a plurality of compression spring between spacing ring and the limiting plate, and under compression spring's effect, the limiting plate compresses tightly on the grout mouth.
3. The high stability grouting anchor rod of a large cross section roadway of claim 2, wherein: limiting grooves are formed in the limiting rings at the two ends of the compression spring and the limiting plate, the limiting grooves in the limiting rings are opposite to the limiting grooves in the limiting plate, and the two ends of the compression spring are placed in the limiting grooves.
4. The high stability grouting anchor rod of a large cross section roadway of claim 1, wherein: the inner wall of the anchor rod body is of a double-layer structure.
5. The high stability grouting anchor rod of a large cross section roadway of claim 1, wherein: the arrangement form of the fixing device in the anchor rod body is a double-spiral structure.
6. The high-stability grouting anchor rod for the large-section roadway according to claim 1 or 5, wherein: a fixing plate is arranged between the anchor and the elastic membrane, and the anchor is fixedly connected to the fixing plate.
7. The high-stability grouting anchor rod for the large-section roadway according to claim 6, wherein: each fixing plate is fixedly connected with two anchors.
8. The high stability grouting anchor rod of a large cross section roadway of claim 1, wherein: the elastic membrane is made of rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211297610.3A CN115539103A (en) | 2022-10-22 | 2022-10-22 | High-stability grouting anchor rod for large-section roadway |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211297610.3A CN115539103A (en) | 2022-10-22 | 2022-10-22 | High-stability grouting anchor rod for large-section roadway |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115539103A true CN115539103A (en) | 2022-12-30 |
Family
ID=84734730
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211297610.3A Pending CN115539103A (en) | 2022-10-22 | 2022-10-22 | High-stability grouting anchor rod for large-section roadway |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115539103A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116696430A (en) * | 2023-08-01 | 2023-09-05 | 江苏和跃新材料科技有限公司 | Grouting type self-expansion anchor rod |
-
2022
- 2022-10-22 CN CN202211297610.3A patent/CN115539103A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116696430A (en) * | 2023-08-01 | 2023-09-05 | 江苏和跃新材料科技有限公司 | Grouting type self-expansion anchor rod |
| CN116696430B (en) * | 2023-08-01 | 2023-10-20 | 江苏和跃新材料科技有限公司 | Grouting type self-expansion anchor rod |
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