CN106968400A - One kind removes unbonded prestressed concrete structure moveable anchor and its application method - Google Patents
One kind removes unbonded prestressed concrete structure moveable anchor and its application method Download PDFInfo
- Publication number
- CN106968400A CN106968400A CN201710368948.6A CN201710368948A CN106968400A CN 106968400 A CN106968400 A CN 106968400A CN 201710368948 A CN201710368948 A CN 201710368948A CN 106968400 A CN106968400 A CN 106968400A
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- CN
- China
- Prior art keywords
- special
- concrete structure
- prestressed concrete
- anchor
- unbonded
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- 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.)
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/08—Members specially adapted to be used in prestressed constructions
- E04C5/12—Anchoring devices
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/08—Members specially adapted to be used in prestressed constructions
- E04C5/12—Anchoring devices
- E04C5/122—Anchoring devices the tensile members are anchored by wedge-action
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/08—Wrecking of buildings
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Piles And Underground Anchors (AREA)
Abstract
Unbonded prestressed concrete structure moveable anchor and its application method are removed the invention discloses one kind, belong to field of civil engineering, for removing unbonded prestressed concrete structure, the problem of security is poor when solving to implement to remove to unbonded prestressed concrete structure.Unbonded prestressed concrete structure is removed to be made up of the anchor cup with special-shaped breach, special-shaped chock, the part of supporting intermediate plate three with moveable anchor.Method：At the beginning of removing unbonded prestressed concrete structure, reject beyond the work anchorage clear distance about 1.0m with side anchored end no less than unbonded tendon surrounding concrete in the range of 120mm；Peel unbonded tendon sheath off, presstressed reinforcing steel is encircled with the anchor cup with special-shaped breach, supporting intermediate plate is inserted between presstressed reinforcing steel and anchor cup inwall, special-shaped chock is pushed into wall of cup breach, supporting intermediate plate is beaten with hand hammer makes it between presstressed reinforcing steel and anchor cup inwall in stoppering state；Opposite side work anchorage is rejected, follow-up dismounting work is then carried out.
Description
Technical field
The invention belongs to field of civil engineering, and in particular to one kind removes unbonded prestressed concrete structure moveable anchor
And its application method.
Background technology
Unbonded prestressed concrete structure refers in structural elements reasonable Arrangement and an anchor unbonded prestressing tendon
Concrete structure.The prestressing force of unbonded tendon is the reliable anchoring by its two ends anchorage to maintain.
Because urban planning adjustment, construction quality do not reach the reasons such as requirement, need sometimes to unbonded prestressed concrete
Structure is implemented to remove.Unbonded prestressing tendon have accumulated very big elongation strain energy, once rejecting side anchorage, unbonded tendon is just
It can fly out, cause casualties and property loss as arrow.To ensure that unbonded prestressed concrete structure removes safety, grind
Hair removes unbonded prestressed concrete structure moveable anchor.
The content of the invention
The present invention is a kind of dismounting unbonded prestressed concrete structure moveable anchor, it is intended to solved to prestressing without bondn
When concrete structure is implemented to remove, side anchorage is rejected, unbonded tendon, which may fly out, to cause casualties and property loss is asked
Topic.
One kind removes unbonded prestressed concrete structure moveable anchor, by the anchor cup with special-shaped breach, special-shaped chock,
The supporting part of intermediate plate three composition.Anchor cup be provided with conventional anchorage identical center taper hole, wall of cup leaves inner wide and outer narrow, near wide remote narrow
Special-shaped breach, breach minimum widith be not less than unbonded tendon nominal diameter.The shapes and sizes of special-shaped chock and anchor cup breach
Just it coincide, as avoids the chock when unbonded tendon is inside contracted from not extruded by intermediate plate, while not skidded off along longitudinal direction, chock is designed
It is remote narrow into inner wide and outer narrow, nearly width.
At the beginning of removing unbonded prestressed concrete structure, reject with the work anchorage clear distance about 1.0m of side anchored end with
Outside no less than unbonded tendon surrounding concrete in the range of 120mm, unbonded tendon sheath is peeled off, with the anchor cup ring with special-shaped breach
Presstressed reinforcing steel is embraced, supporting intermediate plate is inserted between presstressed reinforcing steel and anchor cup inwall, chock is pushed into wall of cup breach, finally struck with hand hammer
Buying intermediate plate makes it between presstressed reinforcing steel and anchor cup inwall in stoppering state.After above-mentioned work is completed, opposite side is rejected
Work anchorage, then carries out follow-up dismounting work.It needs to be noted that dismounting moveable anchor and anchored end work anchorage about 1.0m
Clear distance requirement, be for meet two conditions：One is the drawing that presstressed reinforcing steel has when rejecting opposite side anchored end work anchorage
The concrete that stretching strain will not can be destroyed between moveable anchor and work anchor；Two are turned off the presstressed reinforcing steel between moveable anchor and work anchor,
The elongation strain that presstressed reinforcing steel has between the two can be insufficient to allow unbonded tendon to fly out.
Beneficial effects of the present invention：
When implementing to remove to unbonded prestressed concrete structure using the present invention, reject after side work anchorage, lose
Prestressed unbonded tendon anchors the moveable anchor newly installed again, will not fly out.
Brief description of the drawings
Fig. 1 is the structural representation for removing unbonded prestressed concrete structure moveable anchor；
Fig. 2 has the structural representation of the anchor cup of special-shaped breach for described in；
Fig. 3 has the front view of the anchor cup of special-shaped breach for described in；
Fig. 4 has the top view of the anchor cup of special-shaped breach for described in；
Fig. 5 is the structural representation of the special-shaped chock；
Fig. 6 is the front view of the special-shaped chock；
Fig. 7 is the top view of the special-shaped chock.
In figure：1st, the anchor cup with special-shaped breach；2nd, special-shaped chock；3rd, supporting intermediate plate.
Embodiment
Embodiment one：Present embodiment is illustrated with reference to Fig. 1~7, present embodiment one kind removes soap-free emulsion polymeization
Prestressed reinforced concrete construction is made up of with moveable anchor the anchor cup 1 with special-shaped breach, special-shaped chock 2, the part of supporting intermediate plate 3 three.
Embodiment two：Present embodiment from unlike embodiment one：Anchor cup 1 with special-shaped breach
Provided with conventional mould anchorage identical center taper hole, wall of cup leaves inner wide and outer narrow, nearly wide remote narrow special-shaped breach, and breach is minimum wide
Degree is not less than unbonded tendon nominal diameter.Other are identical with embodiment one.
The inner wide and outer narrow, the nearly wide remote narrow width referred on the inside of special-shaped breach upper end are more than on the outside of special-shaped breach upper end
Width；Width on the inside of special-shaped whose lower end is more than the width on the outside of special-shaped whose lower end；Width on the inside of special-shaped breach upper end
More than the width on the inside of special-shaped whose lower end；Width on the outside of special-shaped breach upper end is more than the width on the outside of special-shaped whose lower end.
Embodiment three：Present embodiment from unlike embodiment one or two：Special-shaped chock 2 is with having
The shapes and sizes of anchor 1 breach of cup of special-shaped breach are just coincide, remote narrow in inner wide and outer narrow, nearly width.Other and specific embodiment party
Formula one or two is identical.
Embodiment four：A kind of use for removing unbonded prestressed concrete structure moveable anchor of present embodiment
What method was specifically carried out according to the following steps：
Step 1: at the beginning of removing unbonded prestressed concrete structure, rejecting with side anchored end work anchorage clear distance about
No less than the concrete around unbonded tendon in the range of 120mm beyond 1.0m；
Step 2: sheath as described above no less than unbonded tendon in 120mm sections is peeled off, with the anchor with special-shaped breach
Cup 1 encircles presstressed reinforcing steel；
Step 3: presstressed reinforcing steel and with special-shaped breach anchor cup 1 inwall between insert supporting intermediate plate 3, by special-shaped chock 2
Wall of cup breach is pushed into, supporting intermediate plate 3 is beaten with hand hammer makes it between presstressed reinforcing steel and anchor cup inwall in stoppering state；Step
4th, the work anchorage of opposite side anchored end is rejected, follow-up dismounting work is then carried out.
Claims (4)
1. one kind, which removes unbonded prestressed concrete structure moveable anchor, to be used to ensure that unbonded prestressed concrete structure is torn open
Except safety, it is characterised in that：It is made up of the anchor cup (1) with special-shaped breach, special-shaped chock (2), the part of supporting intermediate plate (3) three.
2. a kind of dismounting unbonded prestressed concrete structure moveable anchor according to claim 1, it is characterised in that tool
The anchor cup (1) for having special-shaped breach be provided with conventional anchorage identical center taper hole, wall of cup leaves inner wide and outer narrow, near wide remote narrow different
V notch v, breach minimum widith is not less than unbonded tendon nominal diameter.
3. a kind of dismounting unbonded prestressed concrete structure moveable anchor according to claim 1, it is characterised in that different
The shapes and sizes of shape chock (2) and anchor cup (1) breach with special-shaped breach are just coincide, in inner wide and outer narrow, near wide remote narrow.
4. a kind of application method for removing unbonded prestressed concrete structure moveable anchor as claimed in claim 1, it is special
Levy and be to remove what unbonded prestressed concrete structure was specifically carried out according to the following steps with the application method of moveable anchor：
Step 1: at the beginning of removing unbonded prestressed concrete structure, rejecting and side anchored end work anchorage clear distance about 1.0m
In addition no less than the concrete around unbonded tendon in the range of 120mm；
Step 2: sheath as described above no less than unbonded tendon in 120mm sections is peeled off, with the anchor cup with special-shaped breach
(1) presstressed reinforcing steel is encircled；
Step 3: presstressed reinforcing steel and with special-shaped breach anchor cup (1) inwall between insert supporting intermediate plate (3), by special-shaped chock
(2) wall of cup breach is pushed into, supporting intermediate plate (3) is beaten with hand hammer makes it between presstressed reinforcing steel and anchor cup inwall in stoppering shape
State；
Step 4: rejecting the work anchorage of opposite side anchored end, follow-up dismounting work is then carried out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710368948.6A CN106968400B (en) | 2017-05-23 | 2017-05-23 | A kind of dismounting unbonded prestressed concrete structure moveable anchor and its application method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710368948.6A CN106968400B (en) | 2017-05-23 | 2017-05-23 | A kind of dismounting unbonded prestressed concrete structure moveable anchor and its application method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106968400A true CN106968400A (en) | 2017-07-21 |
| CN106968400B CN106968400B (en) | 2019-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710368948.6A Active CN106968400B (en) | 2017-05-23 | 2017-05-23 | A kind of dismounting unbonded prestressed concrete structure moveable anchor and its application method |
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| Country | Link |
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| CN (1) | CN106968400B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109057163A (en) * | 2018-09-29 | 2018-12-21 | 朱建玉 | Ready-package prestressing force Special ground tackle |
| CN109797910A (en) * | 2019-03-04 | 2019-05-24 | 东南大学 | A kind of FRP tendons anchoring intermediate plate, processing method and anchoring process |
| CN110778139A (en) * | 2019-10-21 | 2020-02-11 | 上海市政工程设计研究总院（集团）有限公司 | Local hole-opening construction method for unbonded prestressed tendon concrete slab |
| CN111441239A (en) * | 2020-04-15 | 2020-07-24 | 上海建工材料工程有限公司 | Prefabricated cover beam prestress deep-buried anchor sleeve and installation process thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB804530A (en) * | 1955-09-22 | 1958-11-19 | Stressteel Corp | Improvements in wedge anchors |
| CN101004097A (en) * | 2007-01-23 | 2007-07-25 | 建研科技股份有限公司 | Intermeshing type opening anchorage in use for tendon of steel strand |
| KR20120119639A (en) * | 2011-04-22 | 2012-10-31 | 박병구 | Anchor heads |
| CN103485486A (en) * | 2013-09-13 | 2014-01-01 | 中南林业科技大学 | Novel open type steel strand anchor |
| CN105672578A (en) * | 2016-04-05 | 2016-06-15 | 中国京冶工程技术有限公司 | Tool anchorage for shearing bars of constructed unbounded prestressed concrete structure |
-
2017
- 2017-05-23 CN CN201710368948.6A patent/CN106968400B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB804530A (en) * | 1955-09-22 | 1958-11-19 | Stressteel Corp | Improvements in wedge anchors |
| CN101004097A (en) * | 2007-01-23 | 2007-07-25 | 建研科技股份有限公司 | Intermeshing type opening anchorage in use for tendon of steel strand |
| KR20120119639A (en) * | 2011-04-22 | 2012-10-31 | 박병구 | Anchor heads |
| CN103485486A (en) * | 2013-09-13 | 2014-01-01 | 中南林业科技大学 | Novel open type steel strand anchor |
| CN105672578A (en) * | 2016-04-05 | 2016-06-15 | 中国京冶工程技术有限公司 | Tool anchorage for shearing bars of constructed unbounded prestressed concrete structure |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109057163A (en) * | 2018-09-29 | 2018-12-21 | 朱建玉 | Ready-package prestressing force Special ground tackle |
| CN109797910A (en) * | 2019-03-04 | 2019-05-24 | 东南大学 | A kind of FRP tendons anchoring intermediate plate, processing method and anchoring process |
| CN109797910B (en) * | 2019-03-04 | 2021-02-26 | 东南大学 | Clamping piece for anchoring FRP (fiber reinforced Plastic) rib, machining method and anchoring method |
| CN110778139A (en) * | 2019-10-21 | 2020-02-11 | 上海市政工程设计研究总院（集团）有限公司 | Local hole-opening construction method for unbonded prestressed tendon concrete slab |
| CN111441239A (en) * | 2020-04-15 | 2020-07-24 | 上海建工材料工程有限公司 | Prefabricated cover beam prestress deep-buried anchor sleeve and installation process thereof |
| CN111441239B (en) * | 2020-04-15 | 2021-06-18 | 上海建工建材科技集团股份有限公司 | Prefabricated cover beam prestress deep-buried anchor sleeve and installation process thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106968400B (en) | 2019-05-14 |
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