CN105971287B - Counter force wall vertical prestressing construction method - Google Patents
Counter force wall vertical prestressing construction method Download PDFInfo
- Publication number
- CN105971287B CN105971287B CN201610400155.3A CN201610400155A CN105971287B CN 105971287 B CN105971287 B CN 105971287B CN 201610400155 A CN201610400155 A CN 201610400155A CN 105971287 B CN105971287 B CN 105971287B
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- Prior art keywords
- steel
- force wall
- counter force
- jack
- presstressed reinforcing
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- 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
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/12—Mounting of reinforcing inserts; Prestressing
-
- 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
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/12—Mounting of reinforcing inserts; Prestressing
- E04G21/121—Construction of stressing jacks
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Rod-Shaped Construction Members (AREA)
Abstract
The invention discloses a kind of counter force wall vertical prestressing construction method, including following specific steps：A, steel girder erection, the scaffold top around counter force wall set up girder steel, and the hole that up/down perforation supplies presstressed reinforcing steel to pass through is provided with girder steel；B, presstressed reinforcing steel is arranged, presstressed reinforcing steel lower end is fixed in counter-force foundation of wall, and upper end passes through hole, is lifted up presstressed reinforcing steel and pretension, is then fixed temporarily with work anchor on girder steel top；C, casting concrete is segmented in counter-force wall form, after concrete reaches design strength, is put into several jack between girder steel at the top of counter force wall, several jack operations at the same time, jack girder steel, to each presstressed reinforcing steel synchronous tension；D, after tensioning in place, every presstressed reinforcing steel is anchored in the upper end of counter force wall.By the above-mentioned means, the present invention can effectively solve the problem that presstressed reinforcing steel straightening, fixation during fabrication and installation, get rid of loss of prestress problem caused by the problem of muscle is comparatively laborious and pulling anchor cable stage Multi-stage prestress.
Description
Technical field
The present invention relates to technical field of building construction, more particularly to a kind of counter force wall vertical prestressing construction method.
Background technology
Counter force wall is a kind of large special structure, has more large volume, hole, prestressing force effect, bears very big static(al)
And the features such as dynamic load.This just needs counter force wall to have very big rigidity, and theoretical according to armored concrete, when concrete goes out
Behind existing crack, the rigidity of structure has a very big weakening, to avoid structure from crack occur, then need to be answered in counter force wall using pre-
Power technology.
The more ripe horizontal pre-stressed construction method of existing counter force wall vertical prestressing construction method Primary Reference, but exist
Following defect and deficiency：
（1）Fabrication and installation.Counter force wall height is nearly 10 meters, and thickness is larger general, and concrete need to pour in batches, this is just
Be related to presstressed reinforcing steel fixes and gets rid of muscle work.It is fixed using Steel bar rack, but since steel strand wires material is flexible in itself
It is good, it is yielding, and manually constantly straightening, righting, binding is needed in fixed work progress, it is also easy to produce error, steel strand wires verticality
It is not easy to control.Need to carry out getting rid of muscle work after a section concrete has been poured, vertical prestressing bar gets rid of muscle unlike horizontal presstressed reinforcing steel
It is easy to get rid of muscle construction, needs tower crane to coordinate and carries out, difficulty of construction is big, manually expends big.
（2）Tensioning.Using the small jack of 25t by root tensioning, it is contemplated that counter force wall vertical prestressing bar radical is more, adopts
With this kind of tensioning process, the concrete elastic compression that rear batch of tensioning produces can produce a setting loss to the presstressed reinforcing steel of preceding batch of tensioning
Lose, the precompressed force value for ultimately resulting in total foundation is less than normal.
The content of the invention
The invention mainly solves the technical problem of providing a kind of counter force wall vertical prestressing construction method, can effectively solve
Certainly existing presstressed reinforcing steel straightening, fixation, get rid of the problem of the problem of muscle is comparatively laborious and pulling anchor cable stage loss of prestress.
In order to solve the above technical problems, one aspect of the present invention is：A kind of counter force wall is provided vertically in advance should
Power construction method, including following specific steps：
A, steel girder erection, the scaffold top around counter force wall set up girder steel, steel beam position and presstressed reinforcing steel position phase
It is corresponding, the hole that up/down perforation supplies presstressed reinforcing steel to pass through is provided with girder steel；
B, presstressed reinforcing steel is arranged, presstressed reinforcing steel lower end is fixed in counter-force foundation of wall, and upper end passes through hole, is lifted up pre-
Stress rib and pretension, are then fixed temporarily on girder steel top with work anchor；
C, the casting concrete in the counter-force wall form put up, after counter force wall concrete reaches design strength, in counter-force
Several jack are put between wall top portion and girder steel, several jack operations at the same time, shore girder steel, so as to each presstressed reinforcing steel
Synchronous tension；
D, after tensioning in place, each presstressed reinforcing steel is anchored in the upper end of counter force wall, jack, girder steel is removed and faces
When work anchor, prestress application complete.
In a preferred embodiment of the present invention, the girder steel is welding box-shaped girder steel, including two pieces of horizontal steel plates and two
The vertical steel plate of block, centre form inner cavity.
In a preferred embodiment of the present invention, the both sides of the horizontal steel plate form the edge of a wing, are offered on the edge of a wing
Hole, the edge polishing of described hole are in the arc-shaped.
In a preferred embodiment of the present invention, multiple structures are arranged at intervals with along on girder steel length direction in the inner cavity
Ribbed stiffener is made, the construction ribbed stiffener is perpendicular with horizontal steel plate, vertical steel plate at the same time, and the construction ribbed stiffener avoids hole position
Put.
In a preferred embodiment of the present invention, supporting is provided with the inner cavity on the position at jack center to add
Strength rib, the bearing stiffener are perpendicular with horizontal steel plate, vertical steel plate at the same time.
In a preferred embodiment of the present invention, the jack uses centre-hole jack, and the top of jack is equipped with
Upper steel plate bed course, the top of the upper steel plate bed course are equipped with flitch bed course.
In a preferred embodiment of the present invention, strengthen on the counter force wall positioned at the position of jack lower part for counter force wall
Portion, the counter force wall strengthening portion are internally provided with reinforcing steel bar mesh sheet, lower steel plate are embedded with the top of the counter force wall strengthening portion
Bed course, the lower steel plate bed course pass through more dowels and counter force wall anchor connection.
In a preferred embodiment of the present invention, the anchoring in step d to presstressed reinforcing steel, jack center both sides are about each
Raised type stretching end is used in the range of 300mm, remaining position uses concave stretching end.
In a preferred embodiment of the present invention, the presstressed reinforcing steel is steel strand wires.
In a preferred embodiment of the present invention, in step b, hoist engine is set up on scaffold, by hoist engine to steel
Twisted wire lifted and pretension.
The invention has the advantages that：
1st, presstressed reinforcing steel once completes straightening, fixed work, and degree control is preferable, improves work efficiency, saves cumbersome
Fixing bracket works, and fixed；
2nd, presstressed reinforcing steel once mounting is to top, halfway without carrying out getting rid of muscle again, reduce during muscle is got rid of with other work posts
The influence of cross-operation, reduces difficulty of construction, accelerates speed of application；
3rd, realize that more jack synchronously shore tensioning with girder steel, solve the problems, such as stress loss existing for single tendon stretch, press
Design requirement reaches precompressed force value；
4th, construction method of the invention can be for provided from now on similar to counter force wall and vertical structure using prestressed project can
By experience, it will promote the development of whole prestressing technique, create more social and economic benefits.
Brief description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing, wherein：
Fig. 1 is counter force wall presstressed reinforcing steel plane of arrangement figure；
Fig. 2 is the sectional view along A-A of Fig. 1；
Fig. 3 is the B-B direction sectional view of Fig. 1；
Fig. 4 is the enlarged structure schematic diagram of box beam in Fig. 2.
The mark of each component is as follows in attached drawing：1st, counter force wall, 2, girder steel, 3, presstressed reinforcing steel, 4, hole, 5, jack, 6,
Horizontal steel plate, 7, vertical steel plate, 8, inner cavity, 9, the edge of a wing, 10, construction ribbed stiffener, 11, bearing stiffener, 12, upper steel plate bed course,
13rd, flitch bed course, 14, reinforcing steel bar mesh sheet, 15, lower steel plate bed course, 16, dowel, 17, raised type stretching end, 18, concave
Pull end, 19, hoist engine, 20, scaffold.
Embodiment
The technical solution in the embodiment of the present invention will be clearly and completely described below, it is clear that described implementation
Example is only the part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this area is common
All other embodiment that technical staff is obtained without making creative work, belongs to the model that the present invention protects
Enclose.
Please refer to Fig.1 to Fig.4, the embodiment of the present invention includes：
A kind of counter force wall vertical prestressing construction method, including following specific steps：
A, steel girder erection, the top of scaffold 20 around counter force wall 1 set up girder steel 2, steel beam position and presstressed reinforcing steel 3
Put corresponding, up/down perforation is provided with steel beam flange and supplies the hole 4 that passes through of presstressed reinforcing steel；
B, presstressed reinforcing steel is arranged, general presstressed reinforcing steel uses steel strand wires, and presstressed reinforcing steel lower end is fixed in counter-force foundation of wall,
Upper end passes through hole, presstressed reinforcing steel and pretension is lifted up by the hoist engine being erected on scaffold, then on girder steel top
Fixed temporarily with work anchor, 2 points determine straight line, achieve the purpose that steel strand wires straightening, pretension, and steel strand wires once mounting arrives
Top, gets rid of muscle problem and is also resolved；
C, casting concrete is segmented in the counter-force wall form put up, treats that counter force wall mixes the solidifying soil that last time pours and reaches
After design strength, several jack 5 are put between girder steel at the top of counter force wall, 250t jack are used in the present embodiment, number
The operation at the same time of platform jack, jacks girder steel, so as to each presstressed reinforcing steel synchronous tension, solves stress damage existing for single tendon stretch
Mistake problem；
D, after tensioning in place, every presstressed reinforcing steel is anchored in the upper end of counter force wall, herein to the anchor of presstressed reinforcing steel
Gu using raised type stretching end in the range of the about each 300mm in jack center both sides, remaining position uses concave stretching end,
After the completion of anchoring, jack, girder steel and odd-job anchor are removed, prestress application is completed.
Preferably, the girder steel is welding box-shaped girder steel, including two pieces of horizontal steel plates 6 and two blocks of vertical steel plates 7, middle shape
Into inner cavity 8, the both sides of the horizontal steel plate 6 form the edge of a wing 9, and hole, the edge polishing of described hole are opened up on the edge of a wing 9
It is in the arc-shaped, avoid causing scratch to steel strand wires.
Multiple construction ribbed stiffeners 10, the construction ribbed stiffener are arranged at intervals with the inner cavity along on girder steel length direction
Perpendicular with horizontal steel plate, vertical steel plate at the same time, the construction ribbed stiffener avoids hole location, and construction ribbed stiffener effectively enhances
The integral strength of girder steel.
Bearing stiffener 11 is provided with the position at jack center in the inner cavity, the bearing stiffener is at the same time
Perpendicular with horizontal steel plate, vertical steel plate, bearing stiffener effectively enhances girder steel and bears intensity at jack pressure.
Preferably, the jack uses centre-hole jack, uses more steady.
The top of jack is equipped with upper steel plate bed course 12, and the top of the upper steel plate bed course is equipped with flitch bed course 13, reduces
Between jack and girder steel because of compression and caused by mutually damage.
Position on the counter force wall positioned at jack lower part is counter force wall strengthening portion, is set inside the counter force wall strengthening portion
Reinforcing steel bar mesh sheet 14 is equipped with, counter force wall enhanced portion improves the local strength of counter force wall, can be good at bearing jack
Pressure.
Lower steel plate bed course 15 is embedded with the top of the counter force wall strengthening portion, the lower steel plate bed course 15 passes through more dowels
16 directly contact with counter force wall anchor connection, lower steel plate bed course 15 with very heavy top/bottom part, can reduce jack pair counter force wall
Damage.
The invention has the advantages that：
1st, presstressed reinforcing steel once completes straightening, fixed work, and degree control is preferable, improves work efficiency, saves cumbersome
Fixing bracket works, and fixed；
2nd, presstressed reinforcing steel once mounting is to top, halfway without carrying out getting rid of muscle again, reduce during muscle is got rid of with other work posts
The influence of cross-operation, reduces difficulty of construction, accelerates speed of application；
3rd, realize that more jack synchronously shore tensioning with girder steel, solve the problems, such as stress loss existing for single tendon stretch, press
Design requirement reaches precompressed force value；
4th, construction method of the invention can be for provided from now on similar to counter force wall and vertical structure using prestressed project can
By experience, it will promote the development of whole prestressing technique, create more social and economic benefits.
The foregoing is merely the embodiment of the present invention, is not intended to limit the scope of the invention, every to utilize this hair
The equivalent structure or equivalent flow shift that bright description is made, is directly or indirectly used in other relevant technology necks
Domain, is included within the scope of the present invention.
Claims (10)
1. a kind of counter force wall vertical prestressing construction method, it is characterised in that including following specific steps：
A, steel girder erection, the scaffold top around counter force wall set up girder steel, and steel beam position is corresponding with presstressed reinforcing steel position,
The hole that up/down perforation supplies presstressed reinforcing steel to pass through is provided with girder steel；
B, presstressed reinforcing steel is arranged, presstressed reinforcing steel lower end is fixed in counter-force foundation of wall, and upper end passes through hole, is lifted up prestressing force
Muscle and pretension, are then fixed temporarily on girder steel top with work anchor；
C, casting concrete is segmented in the counter-force wall form put up, treats that the concrete that counter force wall last time pours reaches design
After intensity, several jack are put between girder steel at the top of counter force wall, several jack operations at the same time, jack girder steel, so that
To every presstressed reinforcing steel synchronous tension；
D, after tensioning in place, every presstressed reinforcing steel is anchored in the upper end of counter force wall, after the completion of anchoring, jack release,
Jack, girder steel and odd-job anchor are removed, prestress application is completed.
2. counter force wall vertical prestressing construction method according to claim 1, it is characterised in that the girder steel is welding case
Section steel beam, including two pieces of horizontal steel plates and two blocks of vertical steel plates, centre form inner cavity.
3. counter force wall vertical prestressing construction method according to claim 2, it is characterised in that the two of the horizontal steel plate
Side forms the edge of a wing, and hole is opened up on the edge of a wing, and the edge polishing of described hole is in the arc-shaped.
4. counter force wall vertical prestressing construction method according to claim 3, it is characterised in that along steel in the inner cavity
Be arranged at intervals with multiple construction ribbed stiffeners on beam length direction, the construction ribbed stiffener at the same time with horizontal steel plate, vertical steel plate phase
Vertically, the construction ribbed stiffener avoids hole location.
5. according to claim 1 ~ 4 any one of them counter force wall vertical prestressing construction method, it is characterised in that the inner cavity
In be provided with bearing stiffener on the position at jack center, the bearing stiffener at the same time with horizontal steel plate, vertical steel
Plate is perpendicular.
6. counter force wall vertical prestressing construction method according to claim 1, it is characterised in that the jack is used and worn
Core type jack, the top of jack are equipped with upper steel plate bed course, and the top of the upper steel plate bed course is equipped with flitch bed course.
7. counter force wall vertical prestressing construction method according to claim 1, it is characterised in that be located on the counter force wall
The position of jack lower part is counter force wall strengthening portion, and the counter force wall strengthening portion is internally provided with reinforcing steel bar mesh sheet, described anti-
Lower steel plate bed course is embedded with the top of power wall strengthening portion, the lower steel plate bed course passes through more dowels and counter force wall anchor connection.
8. counter force wall vertical prestressing construction method according to claim 1, it is characterised in that to prestressing force in step d
The anchoring of muscle, uses raised type stretching end in the range of each 300mm in jack center both sides, remaining position uses concave tensioning
End.
9. counter force wall vertical prestressing construction method according to claim 1, it is characterised in that the presstressed reinforcing steel is steel
Twisted wire.
10. counter force wall vertical prestressing construction method according to claim 9, it is characterised in that in step b, in foot hand
Hoist engine is set up on frame, by hoist engine steel strand wires lifted with simultaneously pretension.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610400155.3A CN105971287B (en) | 2016-06-08 | 2016-06-08 | Counter force wall vertical prestressing construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610400155.3A CN105971287B (en) | 2016-06-08 | 2016-06-08 | Counter force wall vertical prestressing construction method |
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| CN105971287A CN105971287A (en) | 2016-09-28 |
| CN105971287B true CN105971287B (en) | 2018-04-20 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106525471B (en) * | 2016-10-12 | 2018-11-02 | 北京工业大学 | A kind of steel frame continuous collapse dynamic test device |
| CN109537905A (en) * | 2017-09-22 | 2019-03-29 | 上海宝冶集团有限公司 | The fast hoisting method of counter force wall presstressed reinforcing steel |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2002089043A (en) * | 2000-09-19 | 2002-03-27 | Maeda Corp | Reinforced concrete structure and construction method for steel framed reinforced concrete, structure |
| CN101251448B (en) * | 2008-03-28 | 2010-11-10 | 福建省九龙建设集团有限公司 | Construction method of inverse force wall and inverse force dado |
| CN102720362B (en) * | 2012-06-20 | 2015-08-05 | 山东寿光第一建筑有限公司 | A kind of high accuracy steel concrete counter force wall construction technology |
| CN102926538B (en) * | 2012-11-19 | 2015-04-29 | 中建八局第四建设有限公司 | Reaction box and construction method of reaction wall |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Vertical prestress construction method of reaction wall Effective date of registration: 20191126 Granted publication date: 20180420 Pledgee: Changzhou Institute of building science group Limited by Share Ltd Pledgor: Jiangsu Dingda Building New Technology Co., Ltd. Registration number: Y2019980000723 |
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Date of cancellation: 20200630 Granted publication date: 20180420 Pledgee: CHANGZHOU ARCHITECTUAL RESEARCH INSTITUTE GROUP Co.,Ltd. Pledgor: JIANGSU DINGDA HIGH-TECH CONSTRUCTION Co.,Ltd. Registration number: Y2019980000723 |
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