CN107675604A - Cast-in-situ concrete hollow slab beam and its core construction method for supporting - Google Patents
Cast-in-situ concrete hollow slab beam and its core construction method for supporting Download PDFInfo
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- CN107675604A CN107675604A CN201710805815.0A CN201710805815A CN107675604A CN 107675604 A CN107675604 A CN 107675604A CN 201710805815 A CN201710805815 A CN 201710805815A CN 107675604 A CN107675604 A CN 107675604A
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- Prior art keywords
- layer
- cast
- hollow slab
- core
- construction method
- Prior art date
- 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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Links
- 239000004567 concrete Substances 0.000 title claims abstract description 62
- 238000010276 construction Methods 0.000 title claims abstract description 33
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 27
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 27
- 239000010959 steel Substances 0.000 claims abstract description 27
- 230000002787 reinforcement Effects 0.000 claims abstract description 26
- 238000005266 casting Methods 0.000 claims abstract description 7
- 239000004698 Polyethylene Substances 0.000 claims description 25
- 239000004744 fabric Substances 0.000 claims description 12
- 125000006850 spacer group Chemical group 0.000 claims description 9
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 7
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 7
- 241001330002 Bambuseae Species 0.000 claims description 7
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 7
- 239000011425 bamboo Substances 0.000 claims description 7
- 229920001903 high density polyethylene Polymers 0.000 claims description 5
- 239000004700 high-density polyethylene Substances 0.000 claims description 5
- 239000002390 adhesive tape Substances 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000004826 seaming Methods 0.000 claims description 3
- 239000002689 soil Substances 0.000 claims description 2
- 230000015271 coagulation Effects 0.000 claims 1
- 238000005345 coagulation Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 8
- 230000008901 benefit Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 230000010412 perfusion Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/12—Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The present invention provides a kind of cast-in-situ concrete hollow slab beam and its core construction method for supporting, methods described comprise the following steps：A, the core pipe of hard is fixed on inside steel reinforcement cage；B, the end of core pipe is sealed；C, the casting concrete in steel reinforcement cage, hollow slab girder is formed.In casting process, the first layer concrete is formed in ttom of pipe with slower speed first；Then the second layer concrete is formed in pipe shaft with slower speed, third layer concrete is finally formed in tube top with faster speed.Be not in the situation that the uniform top plate portion thickness of cored slab uneven thickness lacks after the completion of concreting using construction method so.
Description
Technical field
The present invention relates to a kind of cast-in-situ concrete hollow slab beam core construction method for supporting.
Background technology
Concrete hollow slab bridge accounts for consequence Bridges in Our Country is architectural, current, for the permanent of Mid and minor spans
Property bridge, either highway bridge or Urban Bridge, all as far as possible using concrete hollow slab bridge because this bridge has
Gather materials on the spot, industrialized construction, good endurance, strong adaptability, a variety of advantages such as good integrity.Core is inflated using bridge hollow board
Mould pore-forming technique, it is easy for construction, it is applied widely, can Reusability more than 80-100 times, actually reduce cost, improve construct into
The first-selected instrument of degree.Material is not only saved, and has the features such as shape is changeable, can be into circle, ellipse, rectangle, arch, eight sides
The pipeline such as shape, trapezoidal.Can also be into straight hole, variable cross-section hole etc..
Before bridge hollow board aerated core, first checking for steel reinforcement cage wire joint and roll silk head must not be towards internal diameter direction
Bending, in order to avoid stabbing core, form gas leak phenomenon.First casting reinforced cage bottom portion concrete bed course, then with restricting bridge inflated rubber core
Mode pulling makes longitudinal seam upward in steel reinforcement cage.Open bridge hollow board core valve and be inflated to authorized pressure, you can close
Valve closing door, never must not superpressure.Special-shaped bridge cored slab core should replace the through authorized pressure of inflation.
The bridge hollow board core entered in steel reinforcement cage is fixed up and down.Bridge hollow board aerated core and bottom
Mould overcomes buoyancy and moved left and right.After casting concrete, vibrated simultaneously from both sides using vibrating head, prevent bridge hollow board core
Mould moves left and right.And vibrating head termination can not contact bridge hollow slab core mould, in order to avoid wear out gas leakage.After concrete initial set, beat
Valve opening door is deflated, and extracts bridge hollow board core out.
And the shortcomings that maximum of aerated core is rigidity shortage, after aerated core inflation, appearance will outwards expand, and make original
The plane first manufactured turns into convex surface, and as manufacturing technology is slightly worse, the tire netting twine (or tire screen cloth) in wall spreads uneven, or rubber is thick
Spend it is irregular, can all be formed core inflation after part bulge, in addition core float, it will cause the uniform top plate of cored slab uneven thickness
Segment thickness lacks.
The content of the invention
It is an object of the present invention to provide a kind of cast-in-situ concrete hollow slab beam core construction method for supporting, to solve core
The problem of floating causes the uniform top plate portion thickness of cored slab uneven thickness to lack.
To achieve the above object, the technical solution adopted by the present invention is：
A kind of cast-in-situ concrete hollow slab beam core construction method for supporting, it is characterized in that comprising the following steps：
A, the core pipe of hard is fixed on inside steel reinforcement cage；
B, the end of core pipe is sealed；
C, the casting concrete in steel reinforcement cage, hollow slab girder is formed.
Described cast-in-situ concrete hollow slab beam core construction method for supporting, wherein, the step A includes：
(1) in several horizontal bottom spacer bars of colligation at preset distance above the bottom surface of steel reinforcement cage；
(2) it is in flatly to penetrate inside steel reinforcement cage by core pipe, and is placed in the top of the bottom spacer bar；
(3) core pipe is fixed with ring of the stirrup along the core pipe.
Described cast-in-situ concrete hollow slab beam core construction method for supporting, wherein, the step B includes：Use cutting machine
Cut with core pipe shape of cross section identical bamboo slab rubber, then bamboo slab rubber is fixed on to the tube head position of core pipe with nail, then use
Adhesive tape is sealed seaming position.
Described cast-in-situ concrete hollow slab beam core construction method for supporting, wherein, in the step C, in steel reinforcement cage
Not by location arrangements cloth that core pipe is blocked and the window that shakes is smash, the cloth and the window that shakes is smash and arranges that spacing is not in " well " font
More than 50cm.
Described cast-in-situ concrete hollow slab beam core construction method for supporting, wherein, in the step C：
Pour first to the ttom of pipe 100-130 degree center of circle Angle Position of core pipe, and carry out first layer and vibrate, form first layer and mix
Solidifying soil；
Then second layer concreting is carried out before first layer concrete initial set, and carries out the second layer and vibrates, the second layer
When vibrating, vibrating spear inserts first layer concrete 5cm~10cm to avoid producing cold seam, second layer concreting to core pipe
Tube top 100-130 degree center of circle Angle Position；
Third layer concreting is finally carried out before second layer concrete initial set, and carries out third layer and vibrates, third layer
When vibrating, vibrating spear inserts second layer concrete 5cm~10cm to avoid producing cold seam, until pouring completion.
Described cast-in-situ concrete hollow slab beam core construction method for supporting, wherein, the speed of first layer concreting
1m is poured for every 2.8-3.2min3；The speed of second layer concreting is to pour 1m per 4.8-5.2min3；Third layer concrete
The speed poured is 0.8-1.2m3/min。
Described cast-in-situ concrete hollow slab beam core construction method for supporting, wherein, the control of each vibrating time 20~
30s。
Described cast-in-situ concrete hollow slab beam core construction method for supporting, wherein, the core pipe be PE pipe, HDPE pipe or
Pvc pipe.
A kind of cast-in-situ concrete hollow slab beam, it is characterized in that including：
Steel reinforcement cage；
The core pipe for the hard being fixed on inside steel reinforcement cage, the end part seal of core pipe；
The concrete being cast in steel reinforcement cage, the concrete form hollow-core construction at the core pipe.
Described cast-in-situ concrete hollow slab beam, wherein, the core pipe is PE pipes, HDPE pipes or pvc pipe.
Using technical scheme provided by the invention, there is following beneficial effect：
1st, presentation quality：Be not in that the uniform top plate portion thickness of cored slab uneven thickness lacks after concreting
Situation.
2nd, economic benefit：Construction is simple is convenient, removes form removal process from, can save cost of labor.
3rd, social benefit：By practical application, work well, operating efficiency is high, easily promotes.
Brief description of the drawings
Fig. 1 is the process chart of cast-in-situ concrete hollow slab beam core construction method for supporting provided by the invention；
Fig. 2 is the step schematic diagram one of construction method provided by the invention；
Fig. 3 is the tube head processing schematic diagram of PE pipes；
Fig. 4 is cloth and smashes the window arrangement schematic diagram that shakes；
Fig. 5 is the step schematic diagram two of construction method provided by the invention；
Fig. 6 is the step schematic diagram three of construction method provided by the invention；
Fig. 7 is the step schematic diagram four of construction method provided by the invention.
Description of reference numerals：Steel reinforcement cage 1；Cage bar 11；Bottom spacer bar 2；PE pipes 3；Stirrup 4；Bamboo slab rubber 5；Adhesive tape 6；
Cloth and smash the window 7 that shakes；Position A；Position B.
Embodiment
The present invention provides a kind of cast-in-situ concrete hollow slab beam core construction method for supporting, its process chart such as Fig. 1 institutes
Show, including：
(1) bottom spacer bar colligation：
As shown in Fig. 2 in several horizontal bottom spacer bars 2 of colligation at preset distance above the bottom surface of steel reinforcement cage 1,
In the present embodiment, the bottom spacer bar 2 arranges in parallel interval, it is preferred to use diameter 10mm plain bar, itself and steel
The colligation of cage bar 11 connection of muscle cage 1；
(2) PE pipes are laid：
As shown in Fig. 2 being in flatly to penetrate inside steel reinforcement cage 1 by PE pipes 3, and it is placed in the bottom spacer bar 2
Top；
(3) stirrup positioning colligation：
As shown in Fig. 2 fixed the PE pipes 3 with ring of the stirrup 4 along the PE pipes 3, wherein, in the stirrup 4
Portion wales downwards the PE pipes 3, the banding fixed of cage bar 11 at the both ends of the stirrup 4 and the bottom of the steel reinforcement cage 1；
(4) quality examination：
(5) the tube head processing of PE pipes：
As shown in figure 3, with cutting machine cut with the shape of cross section identical bamboo slab rubber 5 of PE pipes 3, then (do not given with nail
Diagram) bamboo slab rubber 5 is fixed on to the tube head position of PE pipes 3, then sealed seaming position with adhesive tape 6；
(6) concreting：
Wherein, as shown in figure 4, being cloth and smashing the window arrangement schematic diagram that shakes, do not blocked in steel reinforcement cage 1 by PE pipes 3
Position can arrange cloth and smash the window 7 that shakes, and the cloth and smash the window 7 that shakes and preferably arrange that spacing is not more than in " well " font
50cm；
(6.1) ttom of pipe is poured
As shown in figure 5, by pump truck feeding, from cloth and the pan feeding of window 7 that shakes is smash, is poured first to the ttom of pipe 100- of PE pipes 3
130 degree of center of circle Angle Position A (in figure by taking 120 degree of central angles as an example), form the first layer concrete；As shown in figure 5, to avoid PE from managing
3 or so unbalance stress cause tubing to offset, and pouring speed should not be too fast, controls and pours 1m in every 2.8-3.2min3.Casting process
In to observe concrete at any time and rise situation, concrete will uniformly enter mould, be vibrated immediately after entering mould, and vibrating spear will soon be inserted and pulled out slowly, each cloth
And smash the vibrating time of the window 7 that shakes and control in 20~30s, vibrating head must not collide PE pipes 3, reinforcing bar and pre-buried in operation of vibrating
Part etc.；
(6.2) pipe stage casing is poured
It is poured into after the ttom of pipe 100-130 degree center of circle Angle Position of PE pipes 3, second is carried out before first layer concrete initial set
Layer concrete pours, and carries out the second layer and vibrate, and when the second layer vibrates, vibrating spear should insert first layer concrete 5cm~10cm
To avoid producing cold seam, when concrete rises to the pipe waist position of PE pipes 3, the increase of the buoyancy of PE pipes 3, it is (every to slow down poring rate again
4.8-5.2min pours 1m3), to prevent PE pipes 3 from floating dislocation, second layer concreting time control was at 2 hours or so, and the
Two layer concretes are poured to the tube top 100-130 degree center of circle Angle Position B (in figure by taking 120 degree of central angles as an example) of PE pipes 3, form the
Two layer concretes, as shown in Figure 6.
(6.3) tube top is poured
Pour to the tube top 100-130 degree center of circle Angle Position of PE pipes 3, third layer is carried out before second layer concrete initial set
Concreting, and carry out third layer and vibrate, when third layer is vibrated, vibrating spear should insert second layer concrete 5cm~10cm with
Avoid producing cold seam, the problems such as underwater pipeline stabilizing being not present and floats during third layer concreting, speed of perfusion, speed control can be accelerated
In 0.8-1.2m3/ min, until pouring completion, as shown in Figure 7.
It is emphasized that PE pipes 3 in above-described embodiment can also use HDPE pipes, pvc pipe etc. from heavy and light, intensity height,
Anticorrosive, wear-resisting composite core pipe substitutes.
Claims (10)
- A kind of 1. cast-in-situ concrete hollow slab beam core construction method for supporting, it is characterized in that comprising the following steps：A, the core pipe of hard is fixed on inside steel reinforcement cage；B, the end of core pipe is sealed；C, the casting concrete in steel reinforcement cage, hollow slab girder is formed.
- 2. cast-in-situ concrete hollow slab beam core construction method for supporting according to claim 1, it is characterised in that the step Rapid A includes：(1) in several horizontal bottom spacer bars of colligation at preset distance above the bottom surface of steel reinforcement cage；(2) it is in flatly to penetrate inside steel reinforcement cage by core pipe, and is placed in the top of the bottom spacer bar；(3) core pipe is fixed with ring of the stirrup along the core pipe.
- 3. cast-in-situ concrete hollow slab beam core construction method for supporting according to claim 1, it is characterised in that the step Rapid B includes：With cutting machine cut with core pipe shape of cross section identical bamboo slab rubber, bamboo slab rubber is then fixed on core pipe with nail Tube head position, then seaming position is sealed with adhesive tape.
- 4. cast-in-situ concrete hollow slab beam core construction method for supporting according to claim 1, it is characterised in that the step In rapid C, not by location arrangements cloth that core pipe is blocked and the window that shakes is smash in steel reinforcement cage, the cloth and to smash the window that shakes be in " well " Font arranges that spacing is not more than 50cm.
- 5. the cast-in-situ concrete hollow slab beam core construction method for supporting according to claim 1 or 4, it is characterised in that institute State in step C：Pour first to the ttom of pipe 100-130 degree center of circle Angle Position of core pipe, and carry out first layer and vibrate, form first layer coagulation Soil；Then second layer concreting is carried out before first layer concrete initial set, and carries out the second layer and vibrates, the second layer vibrates When, vibrating spear inserts first layer concrete 5cm~10cm to avoid producing cold seam, the tube top of second layer concreting to core pipe 100-130 degree center of circle Angle Position；Third layer concreting is finally carried out before second layer concrete initial set, and carries out third layer and vibrates, third layer is vibrated When, vibrating spear inserts second layer concrete 5cm~10cm to avoid producing cold seam, until pouring completion.
- 6. cast-in-situ concrete hollow slab beam core construction method for supporting according to claim 5, it is characterised in that first layer The speed of concreting is to pour 1m per 2.8-3.2min3；The speed of second layer concreting is to be poured per 4.8-5.2min Build 1m3；The speed of third layer concreting is 0.8-1.2m3/min。
- 7. cast-in-situ concrete hollow slab beam core construction method for supporting according to claim 5, it is characterised in that shake every time Time control is smash in 20~30s.
- 8. cast-in-situ concrete hollow slab beam core construction method for supporting according to claim 1, it is characterised in that the core Pipe is PE pipes, HDPE pipes or pvc pipe.
- 9. a kind of cast-in-situ concrete hollow slab beam, it is characterized in that including：Steel reinforcement cage；The core pipe for the hard being fixed on inside steel reinforcement cage, the end part seal of core pipe；The concrete being cast in steel reinforcement cage, the concrete form hollow-core construction at the core pipe.
- 10. cast-in-situ concrete hollow slab beam according to claim 9, it is characterised in that the core pipe is PE pipes, HDPE pipes Or pvc pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710805815.0A CN107675604A (en) | 2017-09-08 | 2017-09-08 | Cast-in-situ concrete hollow slab beam and its core construction method for supporting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710805815.0A CN107675604A (en) | 2017-09-08 | 2017-09-08 | Cast-in-situ concrete hollow slab beam and its core construction method for supporting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107675604A true CN107675604A (en) | 2018-02-09 |
Family
ID=61136322
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710805815.0A Pending CN107675604A (en) | 2017-09-08 | 2017-09-08 | Cast-in-situ concrete hollow slab beam and its core construction method for supporting |
Country Status (1)
| Country | Link |
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| CN (1) | CN107675604A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB245056A (en) * | 1924-12-27 | 1926-02-25 | Konrad Erdmann | Improved manufacture of joists, beams, girders, shuttering and like building materials |
| CN1297095A (en) * | 1999-11-22 | 2001-05-30 | 邱则有 | In-situ cast hollow reinforced concrete slab pre-provided with hollow hard thin-wall members and its construction method |
| CN200958254Y (en) * | 2006-09-30 | 2007-10-10 | 姜胜清 | Internal mould of cast-in-situs reinforced concrete |
| CN101818574A (en) * | 2010-03-23 | 2010-09-01 | 南通宏华建筑安装有限公司 | Construction method for self-stable high-strength thin-wall pipe internal mold cast-in-place hollow slab |
| CN207619807U (en) * | 2017-09-08 | 2018-07-17 | 北京翔鲲水务建设有限公司 | Cast-in-situ concrete hollow slab beam and its core model supporting construction |
-
2017
- 2017-09-08 CN CN201710805815.0A patent/CN107675604A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB245056A (en) * | 1924-12-27 | 1926-02-25 | Konrad Erdmann | Improved manufacture of joists, beams, girders, shuttering and like building materials |
| CN1297095A (en) * | 1999-11-22 | 2001-05-30 | 邱则有 | In-situ cast hollow reinforced concrete slab pre-provided with hollow hard thin-wall members and its construction method |
| CN200958254Y (en) * | 2006-09-30 | 2007-10-10 | 姜胜清 | Internal mould of cast-in-situs reinforced concrete |
| CN101818574A (en) * | 2010-03-23 | 2010-09-01 | 南通宏华建筑安装有限公司 | Construction method for self-stable high-strength thin-wall pipe internal mold cast-in-place hollow slab |
| CN207619807U (en) * | 2017-09-08 | 2018-07-17 | 北京翔鲲水务建设有限公司 | Cast-in-situ concrete hollow slab beam and its core model supporting construction |
Non-Patent Citations (2)
| Title |
|---|
| 王晓东;: "泵送混凝土浇筑大型箱梁的芯模上浮力试验研究", 中南公路工程, no. 01 * |
| 黄培元: "桥梁混凝土的浇筑和振捣", 《东北公路》, no. 1, pages 1 * |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 100192 Qinghe Road, Haidian District, Beijing 191 Applicant after: BEIJING XIANG KUN WATERWORKS CONSTRUCTION CO.,LTD. Address before: 100192 Room 201, Qinghe Road, Haidian District, Beijing, 201 Applicant before: BEIJING XIANG KUN WATERWORKS CONSTRUCTION CO.,LTD. |
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| CB02 | Change of applicant information | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180209 |
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| RJ01 | Rejection of invention patent application after publication |