CN106498855B - A kind of construction method for the small headroom Cast-in-situ Beam of bridge - Google Patents
A kind of construction method for the small headroom Cast-in-situ Beam of bridge Download PDFInfo
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- CN106498855B CN106498855B CN201611002627.6A CN201611002627A CN106498855B CN 106498855 B CN106498855 B CN 106498855B CN 201611002627 A CN201611002627 A CN 201611002627A CN 106498855 B CN106498855 B CN 106498855B
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- sandbox
- bed die
- construction
- barricade
- cast
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
Abstract
The present invention is a kind of construction method for the small headroom Cast-in-situ Beam of bridge, and sandbox sand body is filled in invention, installs bed die template, beam body bed die sandbox system is formed, to fill up the unappeasable small headroom construction part of conventional stent.Constructed using the installation of freely-supported beam bottom board, formwork reinforcement, concreting and beam body form removable；It is that traditional supporting structure is changed to sandbox structure, by pouring bed die sandbox barricade, fills sandbox sand body, bed die template is installed, beam body bed die sandbox system is formed, to fill up the unappeasable small headroom construction part of conventional stent.
Description
Technical field
The present invention relates to field of bridge construction, specially a kind of construction method for the small headroom Cast-in-situ Beam of bridge.
Background technology
In bridge cast-in-place construction field, the predominantly support configurations of current more use, spelled by all kinds of section bars
Dress sets up beam body cast-in-situ template support, then carries out reinforcing bar colligation and concrete pouring construction, but such construction technology mainly by
It is limited to need certain construction headroom before support is set up, to meet applying for operating personnel and timbering material.With reference to existing at present
There is construction technology, spy look into as follows newly：
In Baidu library《Cast-in-situ prestressed concrete simple supported box beam construction》, this engineering method be applied to 32m across footpaths in advance should
Power concrete box girder is hole-specifically cast-in-place.When particularly pier shaft is set up support more than certain altitude and had any problem, job site ground is weak
Or have under bridge and be open to traffic, open the navigation or air flight when requiring, had an enormous advantage using this mobile formwork bridge fabrication machine construction tool.This engineering method mainly with
On the ground based on construction, root tool field condition is answered during subaqueous work to make appropriate change.
《Railway standard designs》2002(9):47-49,《Existing highway Skew box girder cast-in-place support skill under low clearance
Art》What is introduced is the situation in design bridge headroom 6.3m -5.76m, and meets that bridge down train headroom is not less than 5.0m requirement
It is lower that construction of cast-in-place box girders construction is carried out using pier beam-type support.
《The cast-in-place simple supported box beam construction technology of Bailey truss method》Box girder construction support is assembled into using beret truss assembly
Platform, the construction item such as box girder formwork installation, template precompressed, reinforcement installation, concrete placings, prestressing force initial tensioning is carried out in Bailey bracket
Mesh.
Constructed in above-mentioned document for construction of cast-in-place box girders and carry out box beam using mobile formwork, pier beam-type support and beret truss
Cast-in-place construction certain applies space to meet that template, support set up requirement, it is necessary to have, it is impossible to be used in bridge it is small it is net under it is cast-in-place
Box girder construction.
The content of the invention
For the present invention in order to solve the difficulty of small headroom cast-in-place construction, spy proposes that one kind is applied for the cast-in-place simple supported box beam of small headroom
The bed die sandbox and construction method of work.
For this, the technical scheme is that, a kind of construction method for the small headroom Cast-in-situ Beam of bridge is selected first to apply
Work scheme：The measurement investigation of cast-in-place beam bottom board sandbox boundary of works area and construction height is carried out, determines arrangement and method for construction；
Second step, pour bed die sandbox barricade concrete：Sandbox barricade is carried out by the principle of bed die bag side form, using reinforced concrete
Native pouring molding, bed die surrounding is arranged in, barricade by fining twisted steel reinforce to drawing at left and right sides of beam bottom；
3rd step, fill sandbox sand body：After the completion of barricade concreting, filled out by every mono- layer of carry out sandbox sand body of 20cm
Fill, every layer fill after the completion of method rammed using water ram that packing is real, while installation of the barricade to pull bar is paid attention to during filling；
4th step, sandbox precompressed：Sandbox filled height is operated by higher than bed die designed elevation 1.5-3cm, has been filled
Cheng Hou, precompressed is carried out to bed die sand body using segmentation preloading method, it is ensured that sand body is closely knit, firm, then carries out beam body template, steel
Muscle, concrete construction；
5th step, sandbox are removed：After the completion of the construction of beam body part, hand fit's machinery cuts barricade concrete first, so
Beam body bottom fine sand is manually drawn out afterwards, finally Seeding location remaining low clearance, is rinsed using giant, it is ensured that beam
Whole conversions of body stress system.
Beneficial effect：
Sandbox sand body is filled in the present invention, bed die template is installed, beam body bed die sandbox system is formed, to fill up conventional stent
Unappeasable small headroom construction part.
The present invention is using the installation of freely-supported beam bottom board, formwork reinforcement, concreting and beam body form removable construction；Being will
Traditional supporting structure is changed to sandbox structure, by pouring bed die sandbox barricade, fills sandbox sand body, installs bed die template, shape
Into beam body bed die sandbox system, to fill up the unappeasable small headroom construction part of conventional stent.
Advantage：First, apply simple, support sets up that headroom is small, and structural stability is good；
2nd, heavy mechanical equipment is not needed to coordinate compared with for conventional stent, security risk is small；
3rd, bed die line style is easily controllable, and malformation amount is small；
4th, sandbox peace is torn open convenient, and Cheng Qiaohou is easy to the transformation of beam body stress system；
5th, the technological difficulties that the cast-in-place simple supported box beam construction conventional stent of small headroom can not meet construction are solved, are improved
The boundary of works area of bed die sandbox.
Brief description of the drawings
Fig. 1 is the schematic diagram of the present invention.
Fig. 2 is the longitudinal sectional schematic diagram of the present invention.
Fig. 3 is the horizontal sectional schematic diagram of the present invention.
1 is bridge pier A in figure, and 2 be bridge pier B, and 3 be small headroom, and 4 be bridge, and 51,52 be abutment distribution beam pad block, and 61,62 are
Bowl fastening type full framing, 71,72 be reinforced concrete pile cap and graded broken stone, and 8,9 be sandbox barricade, and 10 be fining twisted steel,
11 be frame bridge, and 12 be bottom surface barricade, and 13 be bottom surface barricade pull bar, and 14 be bed die sandbox, and 15,16 be construction platform and safety
Net.
Embodiment
The present invention is as Figure 1-3.
A kind of construction method for the small headroom Cast-in-situ Beam of bridge, arrangement and method for construction selected first：Measure cast-in-place beam bottom board sand
Case boundary of works area and construction height, arrangement and method for construction is selected with reference to actual conditions.
Second step, pour bed die sandbox barricade concrete：Sandbox barricade 8,9 is carried out by the principle of bed die bag side form, using reinforcing bar
Concreting is molded, and is arranged in the surrounding of bottom surface barricade 12, and sandbox barricade 8,9 carries out reinforcing bottom to drawing by fining twisted steel 10
The barricade of sand case 14 is controlled, reinforced；Measure the cast-in-place boundary of works area of beam bottom board sandbox 14 and construction height and pour bed die sandbox
Barricade concrete：Preferably to be consolidated the sand body of bed die sandbox 14, prevent large volume bed die sandbox 14 from overflowing in a compressed state,
The selected barricade of bed die sandbox 14 of the present invention is controlled, reinforced.
3rd step, fill sandbox sand body：After the completion of barricade concreting, the installation left and right sides carries out sand to pull bar
Case sand body is filled；It is the compactness for ensuring sand body during filling, is layered first according to filled height by every mono- layer of 20cm
Fill, at the same every layer of sand body fill after the completion of method rammed using water to ram packing real.
4th step, sandbox precompressed：Sandbox is highly operated higher than bed die design 1.5-3cm, is filled to designed elevation,
Precompressed is carried out to bed die sand body using segmentation preloading method, it is ensured that sand body is closely knit, firm, then carries out beam body template, reinforcing bar, coagulation
Soil application work.
5th step, sandbox are removed：Hand fit's machinery cuts barricade concrete first, and it is thin then manually to draw out beam body bottom
Sand, position finally small to individual work space, is rinsed using giant, it is ensured that the whole of beam body stress system turns
Change.
The invention of the small cast-in-place simple supported box beam bed die sandbox of headroom, preferably solves conventional stent erection construction, Wu Faman
The construction demand of the small headroom cast-in-situ bridge of foot, has filled up the blank in simple supported box beam bed die sandbox cast-in-place construction field；By adopting
With the principle of bed die bag side form, bed die sandbox barricade concrete is poured, preferably solves beam body sand body during casting concrete
The problem of excessive, there is simple in construction, easy to operate, the features such as safety stability coefficient is high；Using the cast-in-place case simply of bed die sandbox
Beam, the input of large scale equipment when avoiding support installation, the security risk of support removing is eliminated, there is workable, peace
The advantages that full coefficient of stability is high, and malformation amount is small.
In concrete operations, bridge 4 is erected on bridge pier A1, bridge pier B2, forms small headroom 3, wherein bridge pier A1, bridge pier B2
Upper and bridge 4 both ends are respectively abutment distribution beam pad block 51,52, bowl fastening type full framing 61,62, reinforced concrete pile cap with
Graded broken stone 71,72, ultimately form the bridge laying of small headroom.
Laying bottom surface barricade 12 is held with bottom surface barricade pull bar 13 during construction such as on Fig. 2 centers bridge formation 11, by sandbox barricade
8th, 9 held with fining twisted steel 10, form sandbox, safety net 15,16 is set up outside sandbox barricade 8,9 construction platforms.
Claims (2)
- A kind of 1. construction method for the small headroom Cast-in-situ Beam of bridge, it is characterised in that：Arrangement and method for construction selected first：The measurement investigation of cast-in-place beam bottom board sandbox boundary of works area and construction height is carried out, it is determined that construction Scheme；Second step, pour bed die sandbox barricade concrete：Sandbox barricade is carried out by the principle of bed die bag side form, is poured using armored concrete Type is built up, is arranged in bed die surrounding, barricade by fining twisted steel reinforce to drawing at left and right sides of beam bottom；3rd step, fill sandbox sand body：After the completion of barricade concreting, sandbox sand body uses placement in layers, and layering water rams method It is real to ram packing；4th step, sandbox precompressed：Sandbox filled height is operated by higher than bed die designed elevation 1.5-3cm, after the completion of filling, Precompressed is carried out to bed die sand body using segmentation preloading method, it is ensured that sand body is closely knit, firm, then carries out beam body template, reinforcing bar, coagulation Soil application work；5th step, sandbox are removed：After the completion of the construction of beam body part, hand fit's machinery cuts barricade concrete, Ran Houren first Work draws out beam body bottom fine sand, finally Seeding location remaining low clearance, is rinsed using giant, it is ensured that beam body by Whole conversions of power system.
- A kind of 2. construction method for the small headroom Cast-in-situ Beam of bridge according to claims 1, it is characterised in that：Institute Method is rammed using water after the completion of being filled in the 3rd step stated by every mono- layer of carry out sandbox sand body filling of 20cm, every layer and carries out rammer packing It is real, while installation of the barricade to pull bar is paid attention to during filling.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611002627.6A CN106498855B (en) | 2016-11-15 | 2016-11-15 | A kind of construction method for the small headroom Cast-in-situ Beam of bridge |
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| CN201611002627.6A CN106498855B (en) | 2016-11-15 | 2016-11-15 | A kind of construction method for the small headroom Cast-in-situ Beam of bridge |
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| CN106498855B true CN106498855B (en) | 2018-01-19 |
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Families Citing this family (3)
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| CN108487073B (en) * | 2018-04-13 | 2019-07-12 | 中铁十九局集团第七工程有限公司 | A kind of construction method of sandbox basis one-piece casting Cast-in-situ Beam |
| CN108729359A (en) * | 2018-07-17 | 2018-11-02 | 中铁十局集团第二工程有限公司 | Novel bed die sandbox and its system |
| CN110424251A (en) * | 2019-08-06 | 2019-11-08 | 广州市第三市政工程有限公司 | A kind of support construction and its construction method of short Cast-in-place Bent Cap |
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| SU1364653A1 (en) * | 1984-12-04 | 1988-01-07 | Государственный Институт По Изысканиям И Проектированию Мостов "Ленгипротрансмост" | Method of mounting the span structure of bridge by sliding-on at the roadway level |
| KR20070016378A (en) * | 2005-08-03 | 2007-02-08 | 명보산공 주식회사 | Method of constructing temporary bridge and Rotation Apparatus therefor |
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| KR20070016378A (en) * | 2005-08-03 | 2007-02-08 | 명보산공 주식회사 | Method of constructing temporary bridge and Rotation Apparatus therefor |
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| CN202577157U (en) * | 2012-04-17 | 2012-12-05 | 中交三航局第三工程有限公司 | Simple support arch bridge straining beam construction support system |
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