CN102235005B - Recyclable friction type anchor rod and construction method thereof - Google Patents
Recyclable friction type anchor rod and construction method thereof Download PDFInfo
- Publication number
- CN102235005B CN102235005B CN 201010157904 CN201010157904A CN102235005B CN 102235005 B CN102235005 B CN 102235005B CN 201010157904 CN201010157904 CN 201010157904 CN 201010157904 A CN201010157904 A CN 201010157904A CN 102235005 B CN102235005 B CN 102235005B
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- Prior art keywords
- shell
- pole
- callable
- center
- anchor rod
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- 238000010276 construction Methods 0.000 title abstract description 12
- 239000011435 rock Substances 0.000 claims abstract description 37
- 239000002689 soil Substances 0.000 claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000011084 recovery Methods 0.000 abstract description 10
- 238000005516 engineering process Methods 0.000 description 11
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 230000002950 deficient Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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- Piles And Underground Anchors (AREA)
Abstract
The invention relates to a recyclable friction type anchor rod and a construction method thereof in the field of rock and earth engineering anchorage. The recyclable friction type anchor rod comprises a central rod (1), a shell (2) and a hoop (3). Because the structure of the shell (2) is positioned outside the central rod (1) of the recyclable friction type anchor rod, the central rod (1) is tightly connected with the shell (2) through the hoop (3) when the anchor rod is used, the bearing capacity provided by soil is transferred to the central rod (1) through the shell (2), the central rod (1) can be separated from the shell (2) by loosening the hoop (3) when the anchor rod is retracted, the connecting strength between the shell (2) and the soil can be reduced by retracting the central rod (1), the shell (2) is further retracted, and the shell (2) has no residue in soil after being retracted completely. The anchor rod has good environment-friendly benefit, the lateral resistance of the anchor rod can be fully exerted, and the anchor rod has the advantages of high recovery rate, reuse, low cost and reliable quality.
Description
Technical field
The present invention relates to geotechnical engineering anchoring field.
Background technology
Along with engineering construction developing rapidly of underground space development particularly, demand to anchor pole in engineering constructions such as bracing of foundation pit, slope retaining increases day by day, and cause contiguous place underground space development difficulty owing to often leave over the body of rod after the anchor pole use at present in adjacent domain, limited the application of anchor pole to a great extent.In order to realize the recovery of anchor bar body, existing callable anchor pole mainly contains construction technologies such as various anchor poles by the mechanical whorl connection, the detachable anchor pole of U type.The nearest documents of callable anchor pole is a Chinese patent 01234117.7, this technology and other recoverable anchor rod technology all are to adopt the link technique of screw thread-like, by deviating from the never recyclable body of the callable beaer of anchor pole after the feasible use of the mechanical movement of the body of rod, thereby reach the purpose that reclaims the body of rod, there is following defective in this technology: one, with recyclable body and can not recovery body connect, manufacture craft is complicated, the cost height by mechanical connection manner for prior art; They are two years old, behind the anchor bolt construction, because anchor pole is difficult to keep original linear state in drilling construction, deadweight and loading process, thereby the motion modes such as rotation of anchor pole when reclaiming is difficult to realize, engineering experience confirms, when anchor pole is longer (as the soil nailing in the present soil nailing wall foundation pit support), be difficult to realize the purpose that reclaims, so such callable anchor pole is difficult to wide popularization and application in field of civil engineering.The second class recoverable anchor rod is the detachable anchor pole of U-shaped, this technology is that high strength steel strand is curved U-shaped, then U shaped steel twisted wire is positioned in the armature boring, is used to complete the back by discharging an end of U-shaped steel strand, and apply pulling force at the other end, steel strand are pulled out recovery by force.The shortcoming of this technology is: the first, this technology in use, the suffered distributed force of steel strand direction along the line is little and inhomogeneous; The second, pulling force is big during recovery, and recovery difficult is big; The 3rd, this technique building technology complexity, cost height.Because above defective though this technology has occurred for many years, still is difficult to promote so far.I have proposed callable end before this and have held formula anchor pole technology, propose to reclaim to hold easily to hold formula anchor pole recovery scheme, but in soft clay area, hold the end load that holds the formula anchor pole limited, and at this problem, the inventor proposes callable friction rock bolt and solved.
The content of invention
First purpose of the present invention is to provide a kind of callable friction rock bolt, this callable friction rock bolt can provide bigger anchored force, and can realize the recycling of anchor bar body, reduce the influence of anchor pole to peripheral underground space development, enlarge the application of anchor pole, reduce engineering cost significantly.
This callable friction rock bolt comprises center-pole, shell and cuff three parts composition, and center-pole is positioned at enclosure, and cuff is positioned at the shell outside, and cuff is can be with shell and the close-connected member of center-pole.
In above-mentioned callable friction rock bolt, above-mentioned cuff can be reinforcing bar or the rope that spirality is around in the shell outside.
In above-mentioned callable friction rock bolt, above-mentioned cuff can also be that a series of C shape lock tubes add center locking bar composition, and C shape lock tube is provided with 2 lockholes, and the center locking bar can pass the lockhole on the C shape lock tube.
In above-mentioned callable friction rock bolt, above-mentioned shell can be a C shape hollow hoses.
Second purpose of the present invention is to provide a kind of callable friction rock bolt job practices, this callable friction rock bolt job practices can realize the installation and recovery construction of callable friction rock bolt smoothly, reduces difficulty of construction and engineering cost.
This callable friction rock bolt job practices may further comprise the steps:
A) utilize cuff that shell is closely linked to each other with center-pole, finish the manufacturing of callable friction rock bolt.
B) callable friction rock bolt is inserted the soil body.
C) after being used to complete, cuff is unclamped, the active force between shell and center-pole is reduced.
D) extract center-pole out, extract at needs under the situation of shell, can after center-pole is extracted out, extract shell.
Because the center-pole of callable friction rock bolt of the present invention has shell mechanism outward, when anchor pole uses, by cuff center-pole closely is connected with shell, the bearing capacity that makes the soil body provide is passed to center-pole by shell, when anchor pole reclaims, can make between center-pole and the shell and throw off by unclamping cuff, can remove being connected between shell and the soil body by the collection centre bar, and then reclaim shell, after construction is finished, do not have residual in the soil, can give full play to the anchor pole collateral resistance, rate of recovery height, anchor pole is reusable, cost is low, the anchor pole reliable in quality.
Description of drawings
Fig. 1 is a callable friction rock bolt structural representation of the present invention.
Fig. 2 is C shape lock tube and a center locking bar structural representation in the callable friction rock bolt of the present invention.
The specific embodiment
As of the present invention as shown in Figure 1 callable friction rock bolt and first embodiment of job practices, in the construction first step, at first make callable friction rock bolt, selecting external diameter for use is that the welded tube of 48mm is as center-pole (1), selecting internal diameter for use is that the polyethylene pipe of 48mm is as shell (2), when making callable friction rock bolt, one side of shell (2) is cut off, the cross section that makes shell (2) is the C molded cannula of opening, then shell (2) is enclosed within center-pole (1) outside, wrap shell (2) with the reinforcing bar spirality of diameter 6.5mm afterwards, form cuff (3), shell (2) is closely contacted with center-pole (1), make shell (2) and center-pole (1) form an integral body by frictional force, and make cuff (3) extend to operating surface, thereby finish the manufacturing of callable friction rock bolt of the present invention.Finish first embodiment first step of the present invention, enter second step of first embodiment of the present invention.Can by shake into mode callable friction rock bolt is inserted the soil body, also can be by first prebored hole, then callable friction rock bolt is put into the hole, in the hole, inject cement paste afterwards and form anchor bar body, can also directly callable friction rock bolt of the present invention be pressed into the soil body by the static pressure mode.After callable friction rock bolt of the present invention is inserted the soil body, improve frictional force between the callable friction rock bolt of the present invention and the soil body as need, can pass through central hole structure slip casting in the soil body of center-pole (1), to improve the anchor pole bearing capacity.Finish second step of first embodiment of the present invention, enter the 3rd step of the first embodiment of the present invention.After callable friction rock bolt of the present invention is used to complete, such as in the bracing of foundation pit engineering, during pit backfill, the effect of anchor pole has been finished, and callable friction rock bolt of the present invention can be reclaimed, when reclaiming, at first at operating surface position drawing cuff (3), because of cuff (3) is around the spiral-shaped structure in shell (2) outside, under the effect of pulling capacity, just can extract behind cuff (3) cutting soil in the operating surface position.After cuff (3) was extracted, the active force between shell (2) and the center-pole (1) reduced significantly.Finish the 3rd step of first embodiment of the present invention, enter the 4th step of the first embodiment of the present invention.After previous step was finished suddenly, the frictional force between center-pole (1) and the shell (2) was very little, can and extract center-pole (1) in the drawing of operating surface position.As requirement of engineering or in order to save cost, after center-pole (1) is extracted, shell (2) can move to the inside, therefore active force between the shell (2) and the soil body reduces significantly, so can by drawing shell (2) be extracted in the operating surface position, thereby finish present embodiment, finish the installation and recovery construction of callable friction rock bolt of the present invention.
As of the present invention as Fig. 1 and callable friction rock bolt shown in Figure 2 and second embodiment of job practices thereof, similar substantially to first above-mentioned embodiment, difference is, in the present embodiment, cuff (3) is made up of with center locking bar (5) C shape lock tube (4) as shown in Figure 2, C shape lock tube (4) is provided with 2 lockholes (6), and center locking bar (5) can pass lockhole (6).The first step at above-mentioned first embodiment, after on shell (2) being enclosed within center-pole (1), the C shape lock tube (4) that adopts internal diameter to be slightly less than shell (2) external diameter is enclosed within shell (2) outside, by stretch-draw C shape lock tube (4), shell (2) is closely contacted with center-pole (1), after finishing, stretch-draw makes 2 lockholes (6) alignment of C shape lock tube (4), and center locking bar (5) passed through lockhole (6), a plurality of C shape lock tubes (4) can be set, the end of center locking bar (5) is extended to operating surface, thereby finish the manufacturing of the callable friction rock bolt in the present embodiment.In the 3rd step of first above-mentioned embodiment, can directly remove C shape lock tube (4) to the constraint of shell (2) by extracting center locking bar (5) with center-pole (1) at the operating surface place, make the frictional force between shell (2) and the center-pole (1) very little.Other steps are with first above-mentioned embodiment.
This patent includes but not limited to other job practicess of the alternative use of professional person in this area.
Claims (1)
1. callable friction rock bolt job practices, this callable friction rock bolt comprises center-pole (1), shell (2) and cuff (3) three parts, center-pole (1) is positioned at shell (2) inside, cuff (3) is positioned at shell (2) outside, cuff (3) is can be with shell (2) and the close-connected member of center-pole (1), and this callable friction rock bolt job practices may further comprise the steps:
A) utilize cuff (3) that shell (2) is closely linked to each other with center-pole (1), finish the manufacturing of callable friction rock bolt;
B) callable friction rock bolt is inserted the soil body;
C) after being used to complete, cuff (3) is unclamped, the active force between shell (2) and center-pole (1) is reduced;
D) extract center-pole (1) out, extract at needs under the situation of shell (2), can after center-pole (1) is extracted out, extract shell (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010157904 CN102235005B (en) | 2010-04-27 | 2010-04-27 | Recyclable friction type anchor rod and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010157904 CN102235005B (en) | 2010-04-27 | 2010-04-27 | Recyclable friction type anchor rod and construction method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102235005A CN102235005A (en) | 2011-11-09 |
| CN102235005B true CN102235005B (en) | 2013-07-31 |
Family
ID=44886075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010157904 Expired - Fee Related CN102235005B (en) | 2010-04-27 | 2010-04-27 | Recyclable friction type anchor rod and construction method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102235005B (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2222739Y (en) * | 1994-09-01 | 1996-03-20 | 聂万利 | Returnable shell expansion type anchor bolt |
| CN1086433C (en) * | 1997-07-18 | 2002-06-19 | 李志强 | Construction method to recover end pressure bolt support |
| JP2002201716A (en) * | 2000-10-02 | 2002-07-19 | Ozawa Tokushu Giken:Kk | Concrete anchor capable of being recycled |
| CN201661305U (en) * | 2010-04-27 | 2010-12-01 | 张继红 | Friction type anchor rod capable of being recovered |
-
2010
- 2010-04-27 CN CN 201010157904 patent/CN102235005B/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN102235005A (en) | 2011-11-09 |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170627 Address after: 200086 Shanghai city Hongkou District Helen Road 306 Lane 4, Room 502 Patentee after: SHANGHAI GEO-ANCHOR CO.,LTD. Address before: 200086 Shanghai city Hongkou District Helen Road 306 Lane 4, Room 502 Patentee before: Zhang Jihong |
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| 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: 20130731 |