CN203717000U - Pile type pre-stressed anchor cable for high-ground-temperature tunnel supporting - Google Patents
Pile type pre-stressed anchor cable for high-ground-temperature tunnel supporting Download PDFInfo
- Publication number
- CN203717000U CN203717000U CN201420098982.8U CN201420098982U CN203717000U CN 203717000 U CN203717000 U CN 203717000U CN 201420098982 U CN201420098982 U CN 201420098982U CN 203717000 U CN203717000 U CN 203717000U
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- China
- Prior art keywords
- anchor cable
- cable
- cement paste
- anchor
- helix tube
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Abstract
The utility model discloses a pile type pre-stressed anchor cable for high-ground-temperature tunnel supporting. The anchor cable is characterized by comprising first anchor cables (1), second anchor cables (2), a tail end (4), a grout body (5) and a spiral tube (7). According to the pre-stressed anchor cable, the structure stress performance of the grout body at an anchorage section of the anchor cable is improved, the adhesive force between the anchor cable and the grout body is increased, the anchorage force of the anchor cable is increased, good heat insulation and heat dissipation roles can be played, adverse effects caused by high ground temperatures on an anchor body are overcome, and the durability of the anchor cable is improved.
Description
Technical field
The utility model patent relates to a kind of stake type prestress anchorage cable of High-geotemperature tunnel support.
Background technology
Railway, building in a large number of highway and hydroelectric project, emerge a large amount of Deep-buried Long And Big Tunnels engineerings, deep tunnel will run into the puzzlement of High-geotemperature disaster, such as, the maximum buried depth 1600m of Xikang Railway Qinling Tunnel of China, ground temperature reaches 40 ℃, the maximum buried depth 1167m in Gaoligong Shan Mountain tunnel, and ground temperature has reached 60 ℃, the maximum buried depth 4000m in Motuo seepage tunnel, ground temperature is up to 90 ℃.
At highland warm area, the high temperature discharging in rock mass can produce a very large impact tunnel and underground construction prestress anchorage cable.High temperature can affect the structure tension performance of anchoring section injecting cement paste, causes the adhesion strength between itself and anchor cable to decline, and makes to produce relative slippage between anchor cable and injecting cement paste, and even anchor cable is extracted; High temperature also can cause injecting cement paste to produce crack, not only can have influence on the intensity of injecting cement paste, and adhesion strength is declined, and also causes the corrosion aggravation of anchor cable, affects the durability of anchor cable.Current domestic prestress anchorage cable is mainly to take to allow pressure mode alleviate the impact of country rock surface temperature stress, and other is less for the anchor cable in High-geotemperature situation, for High-geotemperature to the technical measures of anchorage cable anchoring function influence substantially in space state.
Utility model content
The object of the utility model patent is to provide a kind of stake type prestress anchorage cable of High-geotemperature tunnel support, and its feature is comprising the first anchor cable (1), the second anchor cable (2), and tail end (4), injecting cement paste (5) and helix tube (7),
Described helix tube (7) is longitudinally arranged at along the central part of injecting cement paste (5), described the first anchor cable (1) is positioned at injecting cement paste (5) inside also and helix tube (7) be arranged in parallel, one end of described the first anchor cable (1) is connected with ground tackle (8), the other end is connected with the one end of the second anchor cable (2), the other end of this second anchor cable (2) is connected with tail end (4), and the second anchor cable (2) is positioned at injecting cement paste (5) inside also and helix tube (7) be arranged in parallel.
Described helix tube (7) is the metallic coil of hollow bull.
Described helix tube (7) is the metallic coil of 5 of hollows.
The PE pipe that described the first anchor cable (1) is hollow, the outer wall of described PE pipe scribbles anticorrisive agent, and described the first anchor cable (1) quantity has a plurality of, and equidistant parallel is arranged at helix tube (7) around.
Described the first anchor cable (1) quantity is 7.
The quantity of described the second anchor cable (2) has a plurality of.
Also comprise stirrup (6), this stirrup (6) is along the peripheral spiral winding of the second anchor cable (2), and described the second anchor cable (2) quantity is 7.
Described the second anchor cable (2) and stirrup (6) are wire quality, and steel wire diameter is 6-8mm, and the pitch of the stirrup of described spiral winding (6) is 100-150mm.
Described injecting cement paste (5) inside is also equidistantly provided with a plurality of isolating frames (3), and this isolating frame (3) is perpendicular to helix tube (7).
Beneficial effect:
Anchoring section stirrup can obviously improve the structure tension performance of injecting cement paste, improve adhesion strength, improve the bonding ductility of steel strand and injecting cement paste, improve the adhesion strength between anchor cable and injecting cement paste, simulation concrete pull-out test shows, be furnished with the steel strand of stirrup test specimen and the peak value adhesion strength of injecting cement paste without the raising of stirrup test specimen nearly 10%, water/binder ratio is that the thermal conductivity of the neat slurry of 0.5:1 is 0.95 left and right, and the thermal conductivity of heat insulating mortar is generally all less than 0.14, steel fibre heat insulating mortar can play good heat insulating function, the steel fibre simultaneously adding, can make the spatial mesh structure of injecting cement paste tightr, make injecting cement paste more be tending towards isotropic, and steel fibre has opposing and extracts and hinder the mechanism of splitting, the split tensile strength of injecting cement paste can improve more than 50%, can effectively improve adhesion strength between anchoring section anchor cable and injecting cement paste and the anchored force of anchor cable, reduce the generation of injecting cement paste crackle, reduce relative slippage, improve durability, be arranged in the hollow multi-start helical tubes of middle part, it is good Heat Conduction Material, its hollow bull structure, Neng Yu outside air UNICOM, can play good heat conduction and heat sinking function, effectively reduce the temperature of anchor cable and injecting cement paste, guaranteed that injecting cement paste and ambient temperature are basically identical, alleviate the impact of High-geotemperature on anchor cable.
Compare the compound anchor cable of tension and compression that ordinary crossing is conventional, the utility model can solve that injecting cement paste cracking, the adhesion strength that High-geotemperature causes declines, even anchor cable such as extracts at the problem preferably, greatly improve the durability of anchor cable, so with regard to long-term economic, the utility model is worthy of popularization.
Accompanying drawing explanation
Below in conjunction with drawings and the embodiments, the utility model is described in further detail:
Fig. 1 is the utility model anchor cable generalized section;
Fig. 2 is the utility model anchorage cable stretching section A-A sectional view;
Fig. 3 is the utility model anchorage cable anchoring section B-B sectional view.
The specific embodiment
Below in conjunction with specific embodiment, further set forth the utility model.
A stake type prestress anchorage cable for High-geotemperature tunnel support, its feature is comprising the first anchor cable (1), the second anchor cable (2), tail end (4), injecting cement paste (5) and helix tube (7),
Described helix tube (7) is longitudinally arranged at along the central part of injecting cement paste (5), described the first anchor cable (1) is positioned at injecting cement paste (5) inside also and helix tube (7) be arranged in parallel, one end of described the first anchor cable (1) is connected with ground tackle (8), the other end is connected with the one end of the second anchor cable (2), the other end of this second anchor cable (2) is connected with tail end (4), and the second anchor cable (2) is positioned at injecting cement paste (5) inside also and helix tube (7) be arranged in parallel.Described helix tube (7) is the metallic coil of hollow bull.
Described helix tube (7) is the metallic coil of 5 of hollows.
The PE pipe that described the first anchor cable (1) is hollow, the outer wall of described PE pipe scribbles anticorrisive agent, and described the first anchor cable (1) quantity has a plurality of, and equidistant parallel is arranged at helix tube (7) around.
Described the first anchor cable (1) quantity is 7.
The quantity of described the second anchor cable (2) has a plurality of.
Also comprise stirrup (6), this stirrup (6) is along the peripheral spiral winding of the second anchor cable (2), and described the second anchor cable (2) quantity is 7.
Described the second anchor cable (2) and stirrup (6) are wire quality, and steel wire diameter is 6-8mm, and the pitch of the stirrup of described spiral winding (6) is 100-150mm.
Described injecting cement paste (5) inside is also equidistantly provided with a plurality of isolating frames (3), and this isolating frame (3) is perpendicular to helix tube (7).
Described injecting cement paste (5) is steel fibre heat insulating mortar, can play good heat insulating function.Can improve adhesion strength between anchoring section anchor cable and injecting cement paste and the anchored force of anchor cable simultaneously, reduce relative slippage; Stirrup 6 can obviously improve the structure tension performance of injecting cement paste, improves adhesion strength, improves the bonding ductility of reinforcing bar and injecting cement paste, improves the adhesion strength between anchor cable and injecting cement paste; The hollow multi-start helical tubes 7 that is arranged in middle part can play good heat conduction and heat sinking function, reduces the temperature of anchor cable and injecting cement paste, alleviates the impact of High-geotemperature on anchor cable.
Hollow multi-start helical tubes 7 is installed with anchor cable simultaneously, and ready steel strand are placed on working platform together with hollow multi-start helical tubes 7, guarantees that it is smooth-going without intersecting; Then by designing requirement, isolating frame 3 annexes such as grade are placed into position.
Hollow multi-start helical tubes 7 adopts bull design, to increase heat-conducting area, plays good radiating effect, and material is good heat conductivity, high-intensity metal material.
The 7 anchoring termination designs of hollow multi-start helical tubes, as Fig. 1, bend vertically upward, so that it has certain cooling effect.
Should guarantee that hollow multi-start helical tubes 7 makes it pass topping and communicates with outside air.Adopt hollow multi-start helical tubes 7 can not only play good heat conduction and heat sinking function, reduce the temperature of anchor cable and injecting cement paste, alleviate the impact of High-geotemperature on anchor cable durability, and can also increase the ability that anchor cable bears radial pressure, alleviate rock mass that High-geotemperature causes or injecting cement paste radially inhomogeneous deformation and adverse effect that the increase of the tangential force that causes produces anchor cable.
Stirrup 6 is isometric with anchoring section anchor cable, and pitch is 150mm, and material adopts with anchor cable with the equicohesive steel wire of material, and diameter is 8mm, uses and without zinc galvanized wire, carries out colligation and be connected with anchor cable 2 outermost layer steel strand.Stirrup 6 can obviously improve the structure tension performance of injecting cement paste, improves adhesion strength, improves the bonding ductility of reinforcing bar and injecting cement paste, improves the adhesion strength between anchor cable and injecting cement paste.
Anchor cable completion of processing, should be under lock and key, and deposits a requirement protection against the tide, waterproof, antirust and anti-pollution.Anchor cable is installed to adopt and is manually sent rope.
After anchor cable installation, by Grouting Pipe, anchor cable total length is carried out to disposable perfusion steel fibre heat insulating mortar, finally carry out normal tensioning anchor seal.Steel fibre heat insulating mortar 5 can play good heat insulating function, can improve adhesion strength between anchoring section anchor cable and injecting cement paste and the anchored force of anchor cable simultaneously, reduces relative slippage.
Should be understood that these embodiment are only not used in restriction scope of the present utility model for the utility model is described.In addition should be understood that those skilled in the art can make various changes or modifications the utility model after having read the content of the utility model instruction, these equivalent form of values fall within the application's appended claims limited range equally.
Claims (9)
1. a stake type prestress anchorage cable for High-geotemperature tunnel support, is characterized in that comprising the first anchor cable (1), the second anchor cable (2), and tail end (4), injecting cement paste (5) and helix tube (7),
Described helix tube (7) is longitudinally arranged at along the central part of injecting cement paste (5), described the first anchor cable (1) is positioned at injecting cement paste (5) inside also and helix tube (7) be arranged in parallel, one end of described the first anchor cable (1) is connected with ground tackle (8), the other end is connected with the one end of the second anchor cable (2), the other end of this second anchor cable (2) is connected with tail end (4), and the second anchor cable (2) is positioned at injecting cement paste (5) inside also and helix tube (7) be arranged in parallel.
2. the stake type prestress anchorage cable of a kind of High-geotemperature tunnel support as claimed in claim 1, is characterized in that described helix tube (7) is for the metallic coil of hollow bull.
3. the stake type prestress anchorage cable of a kind of High-geotemperature tunnel support as claimed in claim 2, is characterized in that described helix tube (7) is for the metallic coil of 5 of hollows.
4. the stake type prestress anchorage cable of a kind of High-geotemperature tunnel support as claimed in claim 1, it is characterized in that the PE pipe that described the first anchor cable (1) is hollow, the outer wall of described PE pipe scribbles anticorrisive agent, described the first anchor cable (1) quantity has a plurality of, and equidistant parallel is arranged at helix tube (7) around.
5. the stake type prestress anchorage cable of a kind of High-geotemperature tunnel support as claimed in claim 4, is characterized in that described the first anchor cable (1) quantity is 7.
6. the stake type prestress anchorage cable of a kind of High-geotemperature tunnel support as claimed in claim 4, is characterized in that the quantity of described the second anchor cable (2) has a plurality of.
7. the stake type prestress anchorage cable of a kind of High-geotemperature tunnel support as claimed in claim 6, characterized by further comprising stirrup (6), and this stirrup (6) is along the peripheral spiral winding of the second anchor cable (2), and described the second anchor cable (2) quantity is 7.
8. the stake type prestress anchorage cable of a kind of High-geotemperature tunnel support as claimed in claim 7, it is characterized in that described the second anchor cable (2) and stirrup (6) are wire quality, steel wire diameter is 6-8mm, and the pitch of the stirrup of described spiral winding (6) is 100-150mm.
9. the stake type prestress anchorage cable of a kind of High-geotemperature tunnel support as claimed in claim 1, is characterized in that described injecting cement paste (5) inside is also equidistantly provided with a plurality of isolating frames (3), and this isolating frame (3) is perpendicular to helix tube (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420098982.8U CN203717000U (en) | 2014-03-06 | 2014-03-06 | Pile type pre-stressed anchor cable for high-ground-temperature tunnel supporting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420098982.8U CN203717000U (en) | 2014-03-06 | 2014-03-06 | Pile type pre-stressed anchor cable for high-ground-temperature tunnel supporting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203717000U true CN203717000U (en) | 2014-07-16 |
Family
ID=51156164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420098982.8U Withdrawn - After Issue CN203717000U (en) | 2014-03-06 | 2014-03-06 | Pile type pre-stressed anchor cable for high-ground-temperature tunnel supporting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203717000U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103821546A (en) * | 2014-03-06 | 2014-05-28 | 成都理工大学 | Pile type prestressed anchor cable for high-ground-temperature tunnel support |
-
2014
- 2014-03-06 CN CN201420098982.8U patent/CN203717000U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103821546A (en) * | 2014-03-06 | 2014-05-28 | 成都理工大学 | Pile type prestressed anchor cable for high-ground-temperature tunnel support |
| CN103821546B (en) * | 2014-03-06 | 2016-02-03 | 成都理工大学 | A kind of pile-type prestress anchorage cable of High-geotemperature tunnel support |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140716 Effective date of abandoning: 20160203 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |