CN212837890U - Pull expansion type anchor rod - Google Patents
Pull expansion type anchor rod Download PDFInfo
- Publication number
- CN212837890U CN212837890U CN202021905336.XU CN202021905336U CN212837890U CN 212837890 U CN212837890 U CN 212837890U CN 202021905336 U CN202021905336 U CN 202021905336U CN 212837890 U CN212837890 U CN 212837890U
- Authority
- CN
- China
- Prior art keywords
- hollow
- expansion
- slot
- steel bar
- bar
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Piles And Underground Anchors (AREA)
Abstract
The utility model belongs to the technical field of the stock construction, especially, relate to a pull-expansion anchor rod. The pull-expansion anchor rod comprises a hollow rod body, an expansion block, a reinforcing steel bar, an extrusion ball, a base plate and a nut; the bottom of the hollow bar body is provided with a backing plate, and the edge of the hollow bar body is provided with a slot; the steel bar is positioned in the hollow bar body, and the bottom of the steel bar is connected with the nut after penetrating through the base plate; the expansion block is fixed on the outer side of the hollow rod body through the open slot; the extrusion ball is welded on the steel bar, the vertical shaft of the extrusion ball is positioned behind the slot, and the outer end of the vertical shaft is higher than the inner side end of the slot. The utility model provides an easy operation, the pull-expansion type stock that the atress performance is good can greatly improve the anchor effect of stock.
Description
Technical Field
The utility model belongs to the technical field of the stock construction, particularly, especially, relate to a pull-expansion anchor rod.
Background
The anchor rod is widely applied to projects such as tunnels, foundation pits, side slopes and the like as a rock and soil mass reinforcement technology, and the action mechanism of the friction type anchor rod mainly depends on the friction resistance between the rod body and the surrounding medium to play a role, so that the bonding property between the rod body and the surrounding medium becomes the key for normally playing the function of the anchor rod. However, in practical engineering application, due to the fact that contact between an anchor rod body and surrounding media is not tight enough and lateral frictional resistance cannot be fully exerted due to the fact that rock and soil mass is soft and weak, the grouting effect is poor and the like, the anchor rod body is pulled out and damaged when the anchoring force does not reach a designed value, and further serious engineering accidents may be caused.
Disclosure of Invention
For solving the above problem, the utility model provides an easy operation, the tensile expanding stock that the atress performance is good.
A pull-expansion anchor rod comprises a hollow rod body, an expansion block, a reinforcing steel bar, an extrusion ball, a base plate and a nut; the bottom of the hollow bar body is provided with a backing plate, and the edge of the hollow bar body is provided with a slot; the steel bar is positioned in the hollow bar body, and the bottom of the steel bar is connected with the nut after penetrating through the base plate; the expansion block is fixed on the outer side of the hollow rod body through the open slot; the extrusion ball is welded on the steel bar, the vertical shaft of the extrusion ball is positioned behind the slot, and the outer end of the vertical shaft is higher than the inner side end of the slot.
As preferred, the utility model discloses the hollow body of rod wall thickness that adopts is 5 ~ 8 mm.
As preferred, the utility model discloses an expansion block that adopts welding or mechanical connection mode symmetric distribution in the both sides of the body of rod.
Preferably, the expansion blocks used in the present invention may be one or more groups, and when the expansion blocks are multiple groups, the expansion blocks are distributed along the rod body at substantially equal intervals.
Preferably, the utility model discloses the position one-to-one of extrusion ball and inflation piece that adopts.
Preferably, the backing plate used in the present invention may be circular, square or polygonal.
As preferred, the utility model discloses the external diameter of the backing plate that adopts is greater than the external diameter of the cavity body of rod, and the internal diameter is greater than the diameter of reinforcing bar.
As preferred, the utility model discloses the reinforcing bar that adopts is provided with the screw thread at the end, anchors the reinforcing bar through screwing up the nut.
The utility model expands and deforms outwards by stretching the reinforcing steel bar and extruding the expansion block by the extruding ball, so that the frictional resistance between the bar body and the surrounding medium is increased; when the supporting rock-soil body is displaced, the rock-soil pressure acts on the base plate to pull the reinforcing steel bars, so that the outward deformation of the expansion blocks is increased, the frictional resistance of the rod bodies is increased, the anchoring performance is improved, and further the rock-soil body is limited from continuing to deform. Compared with the prior art, the utility model provides an easy operation, the pull-expansion type stock that the atress performance is good can greatly improve the anchoring effect of stock.
Drawings
Fig. 1 is a schematic view of the overall structure of the tension-expansion anchor rod provided by the present invention; wherein, 1-hollow rod body, 2-expansion block, 3-reinforcing steel bar, 4-extrusion ball, 5-backing plate, 6-nut and 7-thread.
Detailed Description
The present invention will be further described with reference to specific embodiments, but the scope of the present invention is not limited thereto.
Example 1
A pull-expansion anchor rod comprises a hollow rod body, an expansion block, a reinforcing steel bar, an extrusion ball, a base plate and a nut; the bottom of the hollow bar body is provided with a backing plate, and the edge of the hollow bar body is provided with a slot; the steel bar is positioned in the hollow bar body, and the bottom of the steel bar is connected with the nut after penetrating through the base plate; the expansion block is fixed on the outer side of the hollow rod body through the open slot; the extrusion ball is welded on the steel bar, the vertical shaft of the extrusion ball is positioned behind the slot, and the outer end of the vertical shaft is higher than the inner side end of the slot. The wall thickness of the hollow rod body is 6 mm. The expansion blocks are symmetrically distributed on two sides of the rod body in a welding connection mode. When the expansion blocks are two groups, the expansion blocks are distributed at equal intervals along the rod body. The positions of the extrusion balls and the expansion blocks are in one-to-one correspondence. The shim plate is circular. The external diameter of backing plate is greater than the external diameter of the cavity body of rod, and the internal diameter is greater than the diameter of reinforcing bar. The reinforcing bar is provided with the screw thread at the end, anchors the reinforcing bar through screwing up the nut.
Example 2
A pull-expansion anchor rod comprises a hollow rod body, an expansion block, a reinforcing steel bar, an extrusion ball, a base plate and a nut; the bottom of the hollow bar body is provided with a backing plate, and the edge of the hollow bar body is provided with a slot; the steel bar is positioned in the hollow bar body, and the bottom of the steel bar is connected with the nut after penetrating through the base plate; the expansion block is fixed on the outer side of the hollow rod body through the open slot; the extrusion ball is welded on the steel bar, the vertical shaft of the extrusion ball is positioned behind the slot, and the outer end of the vertical shaft is higher than the inner side end of the slot. The wall thickness of the hollow rod body is 8 mm. The expansion blocks are symmetrically distributed on two sides of the rod body in a mechanical connection mode. When the expansion blocks are two groups, the expansion blocks are distributed at equal intervals along the rod body. The positions of the extrusion balls and the expansion blocks are in one-to-one correspondence. The shim plate is square. The external diameter of backing plate is greater than the external diameter of the cavity body of rod, and the internal diameter is greater than the diameter of reinforcing bar. The reinforcing bar is provided with the screw thread at the end, anchors the reinforcing bar through screwing up the nut.
The utility model expands and deforms outwards by stretching the reinforcing steel bar and extruding the expansion block by the extruding ball, so that the frictional resistance between the bar body and the surrounding medium is increased; when the supporting rock-soil body is displaced, the rock-soil pressure acts on the base plate to pull the reinforcing steel bars, so that the outward deformation of the expansion blocks is increased, the frictional resistance of the rod bodies is increased, the anchoring performance is improved, and further the rock-soil body is limited from continuing to deform. Compared with the prior art, the utility model provides an easy operation, the pull-expansion type stock that the atress performance is good can greatly improve the anchoring effect of stock.
Claims (6)
1. A pull-expansion anchor rod is characterized by comprising a hollow rod body, an expansion block, a reinforcing steel bar, an extrusion ball, a base plate and a nut; the bottom of the hollow bar body is provided with a backing plate, and the edge of the hollow bar body is provided with a slot; the steel bar is positioned in the hollow bar body, and the bottom of the steel bar is connected with the nut after penetrating through the base plate; the expansion block is fixed on the outer side of the hollow rod body through the open slot; the extrusion ball is welded on the steel bar, the vertical shaft of the extrusion ball is positioned behind the slot, and the outer end of the vertical shaft is higher than the inner side end of the slot.
2. An expansion anchor according to claim 1, wherein the wall thickness of the hollow shank is 5 to 8 mm.
3. An expansion anchor according to claim 1, in which the expansion blocks are symmetrically distributed on both sides of the hollow rod body by welding or mechanical connection.
4. A tension bolt according to claim 1, wherein there are a plurality of sets of expansion blocks equally spaced along the hollow shank.
5. A tension bolt according to claim 1, wherein the backing plate is circular or square.
6. An expansion anchor according to claim 1, in which the backing plate has an outer diameter greater than the outer diameter of the hollow shank and an inner diameter greater than the diameter of the reinforcing bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021905336.XU CN212837890U (en) | 2020-09-03 | 2020-09-03 | Pull expansion type anchor rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021905336.XU CN212837890U (en) | 2020-09-03 | 2020-09-03 | Pull expansion type anchor rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212837890U true CN212837890U (en) | 2021-03-30 |
Family
ID=75146165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021905336.XU Expired - Fee Related CN212837890U (en) | 2020-09-03 | 2020-09-03 | Pull expansion type anchor rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212837890U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11771183B2 (en) | 2021-12-16 | 2023-10-03 | Joon Bu Park | Negative Poisson's ratio materials for fasteners |
-
2020
- 2020-09-03 CN CN202021905336.XU patent/CN212837890U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11771183B2 (en) | 2021-12-16 | 2023-10-03 | Joon Bu Park | Negative Poisson's ratio materials for fasteners |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102286975B (en) | Constant-resistance energy-absorbing anchor rod for strengthening large-deformation rock body | |
| CN212837890U (en) | Pull expansion type anchor rod | |
| CN102086770B (en) | Cone resistive friction sleeve large-deformation anchor rod | |
| CN206889004U (en) | One kind is anti-to break large deformation anchor rod | |
| CN102094662A (en) | Friction sleeve type large deformation anchor rod | |
| CN207526513U (en) | The controllable formula that expands increases resistance anchor pole | |
| CN202228096U (en) | Conical-blocking type friction sleeve large-deformation anchor rod | |
| CN107725088B (en) | Rock burst resistance and large-deformation wing type splitting energy-absorbing anchor rod and structure | |
| CN206769935U (en) | A kind of top expands grouted anchor bar | |
| CN106894835B (en) | Let pressure stock | |
| CN113153393A (en) | Self-adaptive anti-shearing large-deformation anchor rod | |
| CN203096737U (en) | Automatic anchoring device | |
| CN203655326U (en) | Liquid-expansion yielding shock and high ground temperature resistant anchor rod | |
| CN220081472U (en) | Umbrella-shaped enlarged head hollow anchor rod | |
| CN102337914A (en) | Welding type anchor rod with dynamic and static combination | |
| CN202284476U (en) | Curved anchor rod with static and dynamic combined function | |
| CN213899022U (en) | Internal stay expanding type pulling force and anchor power monitoring stock | |
| CN218933095U (en) | Sectional reinforcement anti-floating anchor rod for civil construction engineering | |
| CN215518752U (en) | Prestressing force shell anchor structure that rises | |
| CN201521310U (en) | Plastic steel wire rope anchor rod | |
| CN205975604U (en) | Rock reinforcing anchor rod | |
| CN221299211U (en) | Self-adaptive speed increasing mechanism of expansion anchoring device | |
| CN216841750U (en) | Prestressed expansion shell anchor rod | |
| CN215566032U (en) | Novel multi-claw self-locking grouting anchor rod | |
| CN220101311U (en) | Grouting anchor rod |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210330 Termination date: 20210903 |