CN2903182Y - Self drilling type prestressing anchor - Google Patents
Self drilling type prestressing anchor Download PDFInfo
- Publication number
- CN2903182Y CN2903182Y CN 200620042217 CN200620042217U CN2903182Y CN 2903182 Y CN2903182 Y CN 2903182Y CN 200620042217 CN200620042217 CN 200620042217 CN 200620042217 U CN200620042217 U CN 200620042217U CN 2903182 Y CN2903182 Y CN 2903182Y
- Authority
- CN
- China
- Prior art keywords
- threaded pipe
- cannulated threaded
- hollow threaded
- pipe
- backing plate
- 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
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- Piles And Underground Anchors (AREA)
Abstract
The utility model relates to a self-boring pre-stressing force anchor bar comprising a bearing plate, a screw nut and a hollow threaded pipe, characterized in that a drill is arranged at the front end of the hollow threaded pipe, the drill is fixedly connected with the hollow threaded pipe, the drill is provided with an overflow hole communicated with the hollow threaded pipe, the end of the hollow threaded pipe is provided with the bearing plate provided with a screw nut in the hollow threaded pipe outside, and the hollow threaded pipe at the inner side of the bearing plate is covered with a plastic tube covered by a steel pipe shroud. The hollow threaded pipe can be two hollow threaded pipe connected by a coupling sleeve. The hollow threaded pipe is covered by a centering device which is a toothed loop. The utility model has the advantages of that the anchor bar is suitable to the fixation of building foundation of soft geologic structure, and the pre-stressing force can be loaded by the anchor bar to increase the fixing effect of the anchor bar on the building foundation.
Description
Technical field
The utility model relates to a kind of anchor pole, particularly a kind of self-drilling pre-stress anchor rod.
Background technology
On building site, heavy construction basis, often adopt grouted anchor bar to come massif slope or tunnel wall are reinforced at present, after boring on the bodies that are fixed such as massif slope or tunnel wall, grouted anchor bar is inserted in the hole, screwed pipe by hollow grout injection inward then, cement paste curing back is about to the massif slope or tunnel wall is fixed, but when running into some special soft geologies structures, after the drilling rod that is used for holing is extracted, boring is promptly filled out again by the grit that is scattered in the boring, grouted anchor bar is just inserted less than in the boring, therefore existing common grouted anchor bar can't use in the soft geology structure, cause the building foundation engineering constructional difficulties, in order to strengthen anchor pole for the permanent support in the weak surrounding rocks such as broken rock or loose soil layer, need increase prestressing force for the anchor pole that should insert, but the structure of its anchor pole tail end of present common bolt can't apply prestressing force
Summary of the invention
The purpose of this utility model is to solve the problems referred to above that grouted anchor bar can't use when soft geology construct in the prior art, provide a kind of be suitable for that soft geology constructs can in construction, apply prestressed automatic anchor pole.The utility model design self-drilling pre-stress anchor rod, comprise backing plate, nut, cannulated threaded pipe, it is characterized in that: the front end of cannulated threaded pipe has a drill bit, the fixedly connected cannulated threaded pipe of drill bit, the overfolw hole that has the interior pipe with the cannulated threaded pipe to connect on drill bit has backing plate on the end of cannulated threaded pipe, twists on the cannulated threaded pipe in the outside of backing plate and is connected to nut, on the cannulated threaded pipe of the inboard of backing plate, be with plastic pipe, outside plastic pipe, be with steel pipe socket.The cannulated threaded pipe can be that two cannulated threaded pipes connect by adapter sleeve is stubborn.Be with centralizer on the cannulated threaded pipe, centralizer is band ring gear cover.The utility model has the advantages that anchor pole can be applicable to building foundation fixing of soft geology structure, and can be by anchor pole is applied prestressing force, to strengthen the fixedly usefulness of anchor pole to building foundation.
Description of drawings
Below in conjunction with drawings and Examples the utility model is elaborated,
Accompanying drawing is a structural representation of the present utility model,
The specific embodiment
Comprise backing plate 1, nut 2, cannulated threaded pipe 3 among the figure, it is characterized in that: the front end of cannulated threaded pipe 3 has a drill bit 4, drill bit 4 fixedly connected cannulated threaded pipe 3 front ends, the overfolw hole 5 that on drill bit 4, has the interior pipe 10 with cannulated threaded pipe 3 to connect, backing plate 1 is arranged on the end of cannulated threaded pipe 3, on the cannulated threaded pipe 3 in the outside of backing plate 1, twist and be connected to nut 2, on the cannulated threaded pipe 3 of the inboard of backing plate 1, be with plastic pipe 6, outside plastic pipe 6, be with steel pipe socket 7.Cannulated threaded pipe 3 can be that two cannulated threaded pipes 3 are by adapter sleeve 8 stubborn connecing.Be with centralizer 9 on cannulated threaded pipe 3, centralizer 9 is band ring gear cover.Rig directly is inserted into anchor pole and pierces on the body that is fixed in the loose rock stratum or soil layer during use, because loose rock stratum or soil layer need pierce the supporting that could guarantee deeply rock mass, to connect another cannulated threaded pipe 3 with adapter sleeve 8 when therefore needing, for the cannulated threaded pipe that guarantees to pierce 3 is wrapped up by cement paste, on cannulated threaded pipe 3, be with centralizer 9, then slurry casting machine is twisted and be connected on cannulated threaded pipe 3 ends that expose, with compression pump cement is injected in the hole, cement paste is entered by cannulated threaded pipe 3, from the overfolw hole 5 of the front end drill bit 4 of anchor pole cannulated threaded pipe 3, overflow, perfusion backward from the head then, after the cement paste of anchor pole front portion is agglomerated to certain value, turn the terminal nut 2 of cannulated threaded pipe 3, just can apply prestressing force to anchor pole, owing to be with plastic pipe 6 on the cannulated threaded pipe 3, the cannulated threaded pipe 3 of this section can not condensed by the cement paste parcel, therefore when turning the terminal nut 2 of cannulated threaded pipe 3, cannulated threaded pipe 3 can freely stretch outward, be applied in prestressing force, and then with slurry casting machine to the interior cement injection of holing, after filling up whole boring, get final product.
Claims (3)
1, self-drilling pre-stress anchor rod, comprise backing plate, nut, cannulated threaded pipe, it is characterized in that: the front end of cannulated threaded pipe has a drill bit, the front end of the fixedly connected cannulated threaded pipe of drill bit, the overfolw hole that has the interior pipe with the cannulated threaded pipe to connect on drill bit has backing plate on the end of cannulated threaded pipe, twists on the cannulated threaded pipe in the outside of backing plate and is connected to nut, on the cannulated threaded pipe of the inboard of backing plate, be with plastic pipe, outside plastic pipe, be with steel pipe socket.
2, by the described self-drilling pre-stress anchor rod of claim 1, it is characterized in that: the cannulated threaded pipe can be that two cannulated threaded pipes connect by adapter sleeve is stubborn.
3, by the described self-drilling pre-stress anchor rod of claim 1, it is characterized in that: be with centralizer on the cannulated threaded pipe, centralizer is band ring gear cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620042217 CN2903182Y (en) | 2006-05-29 | 2006-05-29 | Self drilling type prestressing anchor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620042217 CN2903182Y (en) | 2006-05-29 | 2006-05-29 | Self drilling type prestressing anchor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2903182Y true CN2903182Y (en) | 2007-05-23 |
Family
ID=38078588
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620042217 Expired - Fee Related CN2903182Y (en) | 2006-05-29 | 2006-05-29 | Self drilling type prestressing anchor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2903182Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101250875B (en) * | 2008-04-15 | 2010-10-13 | 昆明理工大学 | Pawl type self-locking anchor rod |
| CN101392530B (en) * | 2007-09-04 | 2011-04-06 | 简恩马股份有限公司 | End coupling for a rock bolt |
| CN101845959B (en) * | 2009-12-23 | 2012-11-14 | 中国恩菲工程技术有限公司 | Anchor rod |
-
2006
- 2006-05-29 CN CN 200620042217 patent/CN2903182Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101392530B (en) * | 2007-09-04 | 2011-04-06 | 简恩马股份有限公司 | End coupling for a rock bolt |
| CN101250875B (en) * | 2008-04-15 | 2010-10-13 | 昆明理工大学 | Pawl type self-locking anchor rod |
| CN101845959B (en) * | 2009-12-23 | 2012-11-14 | 中国恩菲工程技术有限公司 | Anchor rod |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |