CN1166853C - Full-length multi-point wedge-expanded pipe seam anchor bar - Google Patents
Full-length multi-point wedge-expanded pipe seam anchor bar Download PDFInfo
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- CN1166853C CN1166853C CNB021095914A CN02109591A CN1166853C CN 1166853 C CN1166853 C CN 1166853C CN B021095914 A CNB021095914 A CN B021095914A CN 02109591 A CN02109591 A CN 02109591A CN 1166853 C CN1166853 C CN 1166853C
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Abstract
The present invention relates to a full-length multi-point wedge-expanded pipe seam anchor bar which belongs to the field of engineering support. The present invention is composed of a bar body, wedge bodies, a supporting plate and a flange sleeve ring, wherein the bar body is tubular in shape, a slot is arranged in the full length of the tubular bar body, and a plurality of wedge bodies are arranged in the bar body. One end of the bar body is sheathed with the supporting plate and provided with the flange sleeve ring, and an anchoring end head of the anchor bar is provided with a barb. The present invention has the anchoring functions of full-length anchoring, end anchoring and multi-point wedge expansion, and has the advantages of reliable anchoring, convenient installation, convenient mechanized construction and wide range of application.
Description
Affiliated technical field
The invention belongs to the supporting field of mine, geotechnical engineering, underground construction, slope project and construction of tunnel.
Background technology
In roadway support, bolt support is compared with traditional supporting (yoke supporting and steel bow member supporting etc.), has significant technology, superiority in economy.Owing to the significant Technological Economy superiority of bolt support, now developed into a kind of principal mode of countries in the world mine laneway and other underground engineering support.As far back as the forties, the U.S., the former Soviet Union have just used bolt support at underworkings, have obtained developing rapidly later in colliery, metal mine, water conservancy, tunnel and other underground construction.China used bolt support rock roadway in coal mine from 1956, so far the history in existing more than 40 year.The sixties bolt support technology begin to enter the exploiting field, but because heading is soft, after being subjected to mining influence, rock deformation is very big, require very high to support technology, anchor rod supporting theory, method for designing, anchor pole material, construction equipment and monitoring means are perfect not enough in addition, thereby slower development.With regard to the colliery, nineteen ninety-five state-owned emphasis colliery dig newly then that the shared proportion of bolt support is 28.19% in the tunnel, and mainly use in the fairly simple I of condition, II, III class surrounding rock, the IV of condition more complicated, V class surrounding rock also are in test, summing up experience stage or adopt the combined supporting form of anchor pole and other supporting (referring to yoke supporting and the supporting of steel bow member etc.).More or less all there is different defectives in existing anchor pole, specifically is compared as follows shown in the table:
| The anchor pole type | Existing problems |
| Cement grouted bolt | Because cement will soak in water before twisting in and using, long soaking time, when being installed, the cement volume can stop up bolthole, and make anchor pole install not enter, cement volume soak time is too short, can cause the cement volume middle half-cooked, and the effect that cement is rolled is little. |
| Common pipe seam anchor bar | Effort is installed, the body of rod is perishable, anchored force is difficult to reliably be guaranteed, its tensile strength and anchored force do not match, because the phenomenon that anchor pole is broken in the centre appears in body of rod material problem sometimes. |
| Grouting rock bolt | Mainly be bonding sometimes insecure between mortar and the anchor pole, cause anchor pole to be drawn out, in addition, when annotating mortar, can not fill with, cause anchored force to reduce, and the working procedure complexity. |
| The piston ring type anchor pole | Complex structure, manufacturing is taken a lot of work, and cost is higher. |
| Resin anchor | Body of rod processed complex, the hardening of resin time is longer, press the tangible tunnel of variation on ground, its effect can not in time embody, the country rock that groundwater activities is bigger can not well act on anchoring agent and country rock, and its cost is higher in addition. |
Just be based on the drawback that above-mentioned existing anchor pole exists, proposing the design of this newtype anchor pole.About the traditional type anchor pole, because its manufacturing process difference, the mode of anchoring is also more single, so when using, various problems occur.And along with the increase of the current mining degree of depth, the ground problem of pressing further embodies, and the multi-functional anchor pole of high strength has become the development trend in supporting field.
Summary of the invention
In order to solve the defective that existing anchor pole exists, the invention provides a kind of full-length multi-point wedge-expanded pipe seam anchor bar with total length anchor, end anchor and the bloated anchorage effect of multiple spot wedge.The present invention is made up of the body of rod, the flange collar, supporting plate and wedge, the body of rod is for being rolled into the body of rod of open tubular through cold rolling, having one along tubulose body of rod total length cracks, its cross section is rounded, some wedges are housed in the body of rod, leave certain distance between the wedge in the body of rod, be with supporting plate and the flange collar is housed at an end of the body of rod, it is barb-like that the other end is.Barb length is 50-300mm, and the barb outer end diameter is identical with body of rod external diameter.The material of anchor pole is a steel plate, and its thickness is 1-5mm; The external diameter of anchor pole is Ф 20-Ф 50mm; The total length of the anchor pole width that vertically cracks is 8-45mm; There is barb the anchoring termination of anchor pole, its slope angle is decided on concrete country rock situation, and the length of anchor pole is decided with the demand of job site, is generally 1-5m, when special supporting requires the length of anchor pole, rock-bolt length can change, and the body of rod will carry out preservative treatment, and supporting plate is a square, its specification is decided on concrete pressure from surrounding rock situation, be generally 200mm * 200mm * 10mm, material is a mild steel, is stamped to form; The annulus that the flange collar is made by the dish circle of Ф 4-Ф 16mm.Use anchor pole of the present invention at first to hole, blow the hole then, fill in anchor rod body, with hammer drill or clutch wedge is filled in the body of rod then, anchor pole is fixed in the bolthole, make supporting plate be close to crag at last.Anchor-holding force of anchor bolt scope of the present invention is 30KN-300KN.
The present invention has overcome the defective of traditional anchor pole, has increased the function of anchor pole, has strengthened the anchored force of anchor pole.The present invention is with the mechanism of action difference of common pipe seam anchor bar, its mechanism of action is: mainly be by utilizing the wedge expansive force to learn principle, filling in wedge in anchor rod body the body of rod of anchor pole is expanded, because the body of rod expands, hole wall is produced radially resistance, play the effect of full length fastening; When wedge plug during to the bottom of bolthole, the barb that makes the anchor pole end is at bolthole bottom distending, and adding that wedge expands increases the end anchorage effect, and the end of anchor pole is fixed on the country rock firmly, strengthened the active force of anchor pole and rock, played the effect of holding anchor; Because surrouding rock deformation produces lateral stress, the extruding anchor pole, lateral stress acts on the body of rod of anchor pole, make the body of rod distortion of anchor pole, act on the wedge in the body of rod by the body of rod,, produce reaction force because wedge is a rigid material, form the node of similar " ring ", played the effect of the bloated anchoring of multiple spot wedge.Thereby make this anchor pole have the anchorage effect that total length anchor, end anchor and multiple spot wedge expand, the effect that has improved anchor pole greatly.
Its result of numerical simulation analysis who is undertaken by the anchorage effect to this anchor pole is as follows: as can be seen from Figure 5, along with the loading of external force to test specimen, have the position of wedge to produce stress concentrates in the inside of anchor pole, important function has been played in anchoring to anchor pole, and the wedge in the anchor pole bottom has further increased the active force of anchor pole and rock; Owing to the existence of wedge, less as can see from Figure 6 in the displacement of wedge position, and between wedge, the displacement of the body of rod is bigger, this has further proved the effect that wedge is had in the body of rod.
The maximum characteristics of anchor pole of the present invention are: this anchor pole has the anchorage effect that total length anchor, end anchor and multiple spot wedge expand, and anchored force increases and increases along with support time, moves and increases with surrouding rock deformation, and anchoring is reliable; Easy for installation, be convenient to mechanized construction, without any need for that add and auxiliary ground tackle; There are bigger prestressing force and slippage allow the pressure characteristic, thereby the scope of application is widely arranged, especially, better effect is arranged in the processing of pressure, mine, roadway, tunnel and side slope that displacement is bigger.The present invention proposes a kind of brand-new anchoring process, overcome the drawback that traditional anchor pole exists.
The concrete parameter of anchor pole is looked the concrete condition of country rock and is determined.The scope of application of anchor pole: this anchor pole not only can be used for country rock situation I, II, III class surrounding rock preferably, the IV of condition more complicated, more suitable this anchor pole of V class surrounding rock, because this anchor pole can be out of shape along with the distortion of country rock, country rock is further reinforced in the wedge effect of expanding by anchor pole, and keeps the stable of country rock.
Description of drawings
Fig. 1 is an overall structure schematic diagram of the present invention,
Fig. 2 is an anchor pole of the present invention end sectional drawing,
Fig. 3 is a Supporting plate for anchor shape schematic diagram of the present invention,
Fig. 4 is a wedge sectional drawing of the present invention,
Fig. 5 is a maximum shear stress field pattern of the present invention,
Fig. 6 is a displacement field distribution map of the present invention.
Among the figure: 1 body of rod, 2 wedges, 3 supporting plates, the 4 flange collars, 5 country rocks.
The specific embodiment
Consult Fig. 1, the present invention is made of the body of rod 1, wedge 2, supporting plate 3, the flange collar 4.The body of rod 1 is for being rolled into the body of rod of open tubular through cold rolling, having one along tubulose body of rod total length cracks, and its cross section is rounded, is with supporting plate 3 and the flange collar 4 is housed at an end of the body of rod 1, and it is barb-like that the other end is.Some wedges 2 are housed in the body of rod 1, leave certain distance between the wedge.
Claims (7)
1, a kind of full-length multi-point wedge-expanded pipe seam anchor bar, it is characterized in that this anchor pole is made up of the body of rod, wedge, supporting plate and the flange collar, the body of rod is a tubulose, having one along tubulose body of rod total length cracks, some wedges are housed in the body of rod, end at the body of rod is with supporting plate and the flange collar is housed, and it is barb-like that the other end is.
2, full-length multi-point wedge-expanded pipe seam anchor bar according to claim 1 leaves certain distance between the wedge that it is characterized in that adorning in the said body of rod.
3, full-length multi-point wedge-expanded pipe seam anchor bar according to claim 1, the external diameter that it is characterized in that said anchor pole are Φ 20-Φ 50mm; The total length of the anchor pole width that vertically cracks is 8-45mm, and wall thickness is 1-5mm.
4, full-length multi-point wedge-expanded pipe seam anchor bar according to claim 1 is characterized in that said supporting plate is square.
5, full-length multi-point wedge-expanded pipe seam anchor bar according to claim 1 is characterized in that said wedge is a cylinder, and the one end has tip degree.
6, full-length multi-point wedge-expanded pipe seam anchor bar according to claim 1, the barb length that it is characterized in that said anchor rod anchored end is 50-300mm, the barb outer end diameter is identical with body of rod external diameter.
7, full-length multi-point wedge-expanded pipe seam anchor bar according to claim 1, the flange collar that it is characterized in that said body of rod end are the annulus of Φ 4-Φ 16mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021095914A CN1166853C (en) | 2002-04-29 | 2002-04-29 | Full-length multi-point wedge-expanded pipe seam anchor bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021095914A CN1166853C (en) | 2002-04-29 | 2002-04-29 | Full-length multi-point wedge-expanded pipe seam anchor bar |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1395025A CN1395025A (en) | 2003-02-05 |
| CN1166853C true CN1166853C (en) | 2004-09-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021095914A Expired - Fee Related CN1166853C (en) | 2002-04-29 | 2002-04-29 | Full-length multi-point wedge-expanded pipe seam anchor bar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1166853C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101824996A (en) * | 2010-05-18 | 2010-09-08 | 杭州图强工程材料有限公司 | Expansion shell type anchoring head and anchor rod with the same |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110984396A (en) * | 2019-12-24 | 2020-04-10 | 福州鼓楼纹英建筑工程有限责任公司 | Rear-mounted anchor net and operation method thereof |
-
2002
- 2002-04-29 CN CNB021095914A patent/CN1166853C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101824996A (en) * | 2010-05-18 | 2010-09-08 | 杭州图强工程材料有限公司 | Expansion shell type anchoring head and anchor rod with the same |
| CN101824996B (en) * | 2010-05-18 | 2013-01-30 | 杭州图强工程材料有限公司 | Expansion shell type anchoring head and anchor rod with the same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1395025A (en) | 2003-02-05 |
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