CN108729335A - Toughened internal stress and its installation method - Google Patents
Toughened internal stress and its installation method Download PDFInfo
- Publication number
- CN108729335A CN108729335A CN201810556877.7A CN201810556877A CN108729335A CN 108729335 A CN108729335 A CN 108729335A CN 201810556877 A CN201810556877 A CN 201810556877A CN 108729335 A CN108729335 A CN 108729335A
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- China
- Prior art keywords
- steel
- reinforced concrete
- girder
- open pore
- box beam
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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
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
-
- 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 invention discloses a kind of toughened internal stress and its installation methods,Steel reinforced concrete combined box beam and steel box-girder including embedded connection,The wherein described steel reinforced concrete combined box beam and the steel box-girder are provided with corresponding preformed hole,It is connected and fixed by rod iron,The steel reinforced concrete combined box beam includes the bolt bearing that the first concrete roof and concrete floor in the steel reinforced concrete combined box beam is arranged,The bolt bearing is provided with the first preformed hole along the steel reinforced concrete combined box beam width direction,And first preformed hole is through hole,This is simple in structure,It is easy for installation,And use prefabrication on-site consolidation,Without scene positioning drilling,Improve the efficiency of construction,And enough operating spaces are reserved with when prefabricated,While convenient for on-site consolidation,It is also convenient for maintenance in the future,Overcome the problem that existing conventional transition section connecting structure site operation is inconvenient and difficulty of construction is big.
Description
Technical field
The present invention relates to the compound bridge construction fields of steel reinforced concrete, and in particular to toughened internal stress and its installation method.
Background technology
The compound bridge of steel reinforced concrete is a kind of novel bridge structure form to grow up after steel reinforced concrete combined bridge, master
Beam is longitudinally mixed by beams of concrete, combination beam and girder steel, and two kinds of material properties of steel and concrete is made to be not fully exerted.Mesh
One of main compound bridge structure form is to be substituted for steel-concrete combined structure box beam bridge girder span centre segment certainly in preceding engineering
Thus the lighter steel box-girder of weight mitigates girder dead weight, increases the span ability of girder, has good economy and construction condition
Adaptability.But since steel differs too big with both concrete material properties, compatibility of deformation has prodigious difference, therefore steel reinforced concrete knot
The cooperative bearing problem in conjunction portion is constantly subjected to the great attention of Bridge Design person.
The use of more connecting structure is mainly at present that concrete floor is connect with steel sole plate using changeover portion, the method is existing
Field construction is cumbersome, and anchor hole positioning and construction are high to required precision, make troubles to construction.Therefore from reduction steel reinforced concrete engaging portion
Difficulty of construction improves construction efficiency, and the purpose shortened the construction period is set out, and creates a kind of simple structure, and can meet stress performance
Toughened internal stress and its installation method be of great significance.
Invention content
It is a primary object of the present invention to, overcome defect existing for the compound bridge interconnecting piece of existing steel reinforced concrete, and provide one
Kind toughened internal stress and its installation method, simple structure is easy for construction, and can improve the cooperative bearing ability of steel reinforced concrete engaging portion,
Thus more suitable for practicality, and with the utility value in industry.
The object of the invention to solve the technical problems is realized using following technical scheme.
A kind of toughened internal stress includes the steel reinforced concrete combined box beam and steel box-girder of embedded connection, wherein the steel reinforced concrete combines
Box beam and the steel box-girder are provided with corresponding preformed hole, are connected and fixed by rod iron.
Further, the toughened internal stress includes being arranged in the first concrete roof of the steel reinforced concrete combined box beam and mixed
The bolt bearing of solidifying soil bottom plate, the bolt bearing are provided with the first preformed hole along the steel reinforced concrete combined box beam width direction,
And first preformed hole is through hole.
Further, at least four institutes are both provided on the inner top panel of the steel reinforced concrete combined box beam and the inner bottom plating
Bolt bearing is stated, and arranged type is distributed the bolt bearing in length and breadth.
Further, first concrete roof and the coagulation of the bolt bearing with the steel reinforced concrete combined box beam
The junction of native bottom plate is terrace with edge structure.
Further, the one end of the steel box-girder is provided with the open pore steel plate of extension, and the open pore steel plate is described in
The length direction of steel box-girder is arranged.
Further, the open pore steel plate, including be arranged in the first open pore steel plate of both sides and setting at two pieces described the
The second open pore steel plate between one open pore steel plate, second open pore steel plate is at least provided with one piece, and the first trepanning steel
Plate and second open pore steel plate are arranged in parallel.
Further, the hole of second open pore steel plate be tapped anchor hole, the rod iron be provided with it is described
The mating external screw thread of the internal thread of anchor hole.
Further, the inner bottom plating of the open pore steel plate and the steel box-girder welds.
Further, it is reserved between at least 60cm between first open pore steel plate and the steel web of the steel box-girder
Away from.
Further, it is coated with fibre reinforced composites FRP on the outside of rod iron.
The installation method of toughened internal stress, includes the following steps：
Step 1 pours the steel reinforced concrete combined box beam, the welding steel box-girder；
The steel box-girder being welded into is inserted into the steel reinforced concrete combined box beam by step 2；
The rod iron is passed through the preformed hole of the steel reinforced concrete combined box beam and the steel box-girder to be connected and fixed the steel by step 3
Mixed combined box beam and the steel box-girder complete assembled operation；
FRP composite materials are smeared in the outer surface that the assembled rod iron is completed in the step 3 by step 4.
Further, the rod iron is provided with mating screw thread, and the rod iron and the preformed hole with the preformed hole
Between in a manner of bolted be connected.
Using above-mentioned technical proposal, following technique effect can be obtained：
1）, the configuration of the present invention is simple, it is easy for installation, and use prefabrication on-site consolidation, without scene positioning drill, improve
The efficiency of construction, and enough operating spaces are reserved with when prefabricated, while being convenient for on-site consolidation, it is also convenient for repair in the future
Maintenance overcomes the problem that existing conventional transition section connecting structure site operation is inconvenient and difficulty of construction is big；
2）, act not only as connecting the rod iron of steel box-girder and steel reinforced concrete combined box beam the transversely prestressed bars of box beam, and
It can play the role of lateral stiffening, further increase the ability of the cooperative bearing of steel reinforced concrete engaging portion.
Description of the drawings
Fig. 1 is the structural schematic diagram that toughened internal stress assembly of the present invention is completed；
Fig. 2 is the structural schematic diagram before toughened internal stress assembly of the present invention；
Fig. 3 is enlarged drawing at A in Fig. 1；
Fig. 4 is the partial enlarged view of steel box-girder and steel reinforced concrete combined box beam interconnecting piece；
Wherein：
1- steel reinforced concrete combined box beams, 11- bolt bearings, the first preformed holes of 111-, 112- terrace with edge structures, 12- the first steel webs, 13-
First concrete roof, 14- concrete floors；
2- steel box-girders, 21- open pore steel plates, the first open pore steel plates of 211-, the second preformed holes of 2111-, the second open pore steel plates of 212-,
2121- anchor holes, the second concrete rooves of 22-, 23- the second steel webs, 24- steel sole plates；
3- rod irons；
4- bolts.
Specific implementation mode
Further to illustrate the present invention to reach the technological means and effect that predetermined goal of the invention is taken, to foundation
Its specific implementation mode of toughened internal stress and its installation method, feature and its effect proposed by the present invention are described in detail as after.
As shown in Figure 1, the invention discloses a kind of toughened internal stress, include 1 He of steel reinforced concrete combined box beam of embedded connection
Steel box-girder 2, wherein steel reinforced concrete combined box beam 1 and steel box-girder 2 are provided with corresponding preformed hole, are connected and fixed by rod iron 3, specifically
, first, steel box-girder 2 is inserted into steel reinforced concrete combined box beam 1, then the insertion steel reinforced concrete of rod iron 3 combined box beam 1 and steel box-girder 2 are preset
Preformed hole in so that the two be linked together.
As shown in Fig. 2, steel reinforced concrete combined box beam 1 is by the first steel web 12, the first concrete roof 13,14 groups of concrete floor
At additionally including and be arranged in the first concrete roof 13 of steel reinforced concrete combined box beam 1 and the bolt bearing 11 of concrete floor 14.
Bolt bearing 11 is provided with the first preformed hole 111 along 1 width direction of steel reinforced concrete combined box beam, and the first preformed hole 111 is perforation
Hole, wherein along the direction that 1 width direction of steel reinforced concrete combined box beam is vertical line between two piece of first steel web 12.First preformed hole 111
Aperture match with the diameter of rod iron 3, be convenient for rod iron 3 insertion, using rod iron 3 be inserted into the first preformed hole 111 can play
Fixed function is convenient for the transmission of power, and increases connection dynamics between the two.
As shown in figure 4, being both provided at least on the first concrete roof 13 and concrete floor 14 of steel reinforced concrete combined box beam
Four bolt bearings 11, and arranged type is distributed bolt bearing 11 in length and breadth, is distributed in m × n arranged types, per socket pin bearing 11 along steel
The 1 width direction arrangement of mixed combined box beam.The setting of multiple rows of bolt bearing 11 can further increase the compound bridge interconnecting piece of steel reinforced concrete
Binding force.
Preferably, the company of bolt bearing 11 and the first concrete roof 13 and concrete floor 14 of steel reinforced concrete combined box beam 1
It is terrace with edge structure 112 to meet place, since the bottom surface of terrace with edge structure 112 is more than top surface, i.e., bolt bearing 11 and concrete roof 13 and
Trapezoidal transition is used between concrete floor 14, the problem for effectivelying prevent shear stress excessive occurs.
As shown in Fig. 2, steel box-girder 2 is made of the second concrete roof 22, the second steel web 23 and steel sole plate 24, in order into
One step increases the attachment force between steel box-girder 2 and steel reinforced concrete combined box beam 1, and the one end of steel box-girder 2 is provided with the trepanning steel of extension
Plate 21, and open pore steel plate 21 is arranged along the length direction of steel box-girder 2, specifically, the length direction of steel box-girder 2 is to be parallel to second
The direction of steel web 23.And the hole of open pore steel plate 21 and rod iron 3 are mating, are inserted into open pore steel plate 21 convenient for rod iron 3.
Open pore steel plate 21, including be arranged in the first open pore steel plate 211 of both sides and setting in two piece of first open pore steel plate 211
Between the second open pore steel plate 212, the second open pore steel plate 212 is at least provided with one piece, and the first open pore steel plate 211 and second is opened
Hole steel plate 212 is arranged in parallel.The setting of polylith open pore steel plate 21 can be effectively increased between steel box-girder 2 and steel reinforced concrete combined box beam 1
Attachment force, and open pore steel plate 21 plays the role of steel web, can effectively improve the bending resistance shear behavior of box beam junction.
Preferably, the hole of the second open pore steel plate 212 is tapped anchor hole 2121, and rod iron 3 is provided with and anchor hole
The mating external screw thread of 2121 internal thread.Rod iron 3 can be divided to by the setting of the second open pore steel plate 212 and anchor hole 2121 to be saved for two
Duan Jinhang is anchored respectively, is prevented rod iron 3 long and can not be constructed.In addition, the threaded connection at anchor hole 2121 further increases
The stability of attachment force and linkage section between the two.The hole of first open pore steel plate is the second preformed hole 2111, and rod iron 3 passes through
It is anchored with bolt on the outside of the first open pore steel plate after second preformed hole 2111.
Preferably, open pore steel plate 21 and the inner bottom plating of steel box-girder 2 weld, and are effective against open pore steel plate 21 and steel box-girder 2
Shear stress between structure increases the service life of steel box-girder 2.
Preferably, it is reserved at least spacing of 60cm between the first open pore steel plate 211 and the steel web of steel box-girder 2, is work
The reserved certain operating space of construction of people, anchors convenient for the on-site consolidation of rod iron 3.
Preferably, 3 outside of rod iron is coated with fibre reinforced composites FRP, to improve the corrosion resistance of rod iron 3, increases simultaneously
The structural strength of strong rod iron 3.
The invention also discloses the installation methods of above-mentioned toughened internal stress, include the following steps：
Step 1 pours steel reinforced concrete combined box beam 1, welding steel box-girder 2, can be prefabricated in the factory；
The steel box-girder 2 being welded into is inserted into steel reinforced concrete combined box beam 1 by step 2；
Rod iron 3 is passed through the preformed hole of steel reinforced concrete combined box beam 1 and steel box-girder 2 to be connected and fixed 1 and of steel reinforced concrete combined box beam by step 3
Steel box-girder 2 completes assembled operation；
FRP composite materials are smeared in the outer surface that assembled rod iron 3 is completed in step 3 by step 4.
Further, rod iron 3 is provided with mating screw thread with preformed hole, and to be bolted between rod iron 3 and preformed hole
Mode be connected.It is anchored using bolt 4 in the outside of the first open pore steel plate 211, further increases steel reinforced concrete combined box beam 1
Attachment force between steel box-girder 2.
Toughened internal stress disclosed by the invention overcomes the engaging portion installation complexity of existing traditional steel reinforced concrete combined bridge, knot
Steel reinforced concrete combined box beam 1 and steel box-girder 2 are attached by the problem of conjunction portion cooperative bearing difference using rod iron 3, and bolted
Mode further increases attachment force between the two, prevents the play of rod iron 3 under external force so as to shorten the structure
In addition service life is provided with bolt bearing on the first concrete roof 13 and concrete floor 14 of steel reinforced concrete combined bridge
11, steel box-girder 2 is provided with the open pore steel plate 21 of extension, the creative knot that steel reinforced concrete combined box beam 1 and steel box-girder 2 are passed through itself
Structure is attached, and can be according to the size of actual conditions, such as box-beam structure, to the quantity of bolt bearing 11, trepanning rod iron 3
Quantity is adjusted, so that it disclosure satisfy that actual demand, is increased its versatility, is more suitable for practicality, and bolt
Bearing 11 can effectively resist the shear stress of steel reinforced concrete combined box beam 1 and 2 engaging portion of steel box-girder with open pore steel plate 21.
The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, though
So the present invention has been disclosed as a preferred embodiment, and however, it is not intended to limit the invention, any technology people for being familiar with this profession
Member, without departing from the scope of the present invention, when the technology contents using the disclosure above make a little change or modification
For the equivalent embodiment of equivalent variations, as long as being the content without departing from technical solution of the present invention, according to the technical essence of the invention
To any simple modification, equivalent change and modification made by above example, in the range of still falling within technical solution of the present invention.
Claims (10)
1. a kind of toughened internal stress, which is characterized in that the steel reinforced concrete combined box beam including embedded connection（1）And steel box-girder（2）,
Described in steel reinforced concrete combined box beam（1）With the steel box-girder（2）It is provided with corresponding preformed hole, passes through rod iron（3）It is connected and fixed.
2. toughened internal stress according to claim 1, which is characterized in that the steel reinforced concrete combined box beam（1）Exist including setting
The steel reinforced concrete combined box beam（1）The first interior concrete roof（13）And concrete floor（14）On bolt bearing（11）, institute
State bolt bearing（11）It is provided with along the steel reinforced concrete combined box beam（1）First preformed hole of width direction（111）, and described first
Preformed hole（111）For through hole.
3. toughened internal stress according to claim 2, which is characterized in that first concrete roof（13）It is mixed with described
Solidifying soil bottom plate（14）On be both provided at least four bolt bearings（11）, and the bolt bearing（11）Arranged type point in length and breadth
Cloth.
4. toughened internal stress according to claim 2, which is characterized in that the bolt bearing（11）With first coagulation
Native top plate（13）With the concrete floor（14）Junction be terrace with edge structure（112）.
5. toughened internal stress according to claim 1, which is characterized in that the steel box-girder（2）One end be provided with it is outer
The open pore steel plate prolonged（21）, and the open pore steel plate（21）Along the steel box-girder（2）Length direction setting.
6. toughened internal stress according to claim 5, which is characterized in that the open pore steel plate（21）Including being arranged in both sides
The first open pore steel plate（211）With setting in two pieces of first open pore steel plates（211）Between the second open pore steel plate（212）,
Second open pore steel plate（212）At least provided with one piece, and first open pore steel plate（211）With second open pore steel plate
（212）It is arranged in parallel.
7. toughened internal stress according to claim 6, which is characterized in that second open pore steel plate（212）Hole be band
The anchor hole of internal thread（2121）, the rod iron（3）It is provided with and the anchor hole（2121）Mating outer of the internal thread
Screw thread.
8. toughened internal stress according to claim 5, which is characterized in that the open pore steel plate（21）With the steel box-girder
（2）Inner bottom plating welding.
9. the installation method of toughened internal stress according to claim 1, which is characterized in that include the following steps：
Step 1 pours the steel reinforced concrete combined box beam（1）, the welding steel box-girder（2）；
Step 2, the steel box-girder that will be welded into（2）It is inserted into the steel reinforced concrete combined box beam（1）It is interior；
Step 3, by the rod iron（3）Across the steel reinforced concrete combined box beam（1）With the steel box-girder（2）Preformed hole it is solid to connect
The fixed steel reinforced concrete combined box beam（1）With the steel box-girder（2）, complete assembled operation；
Step 4 will complete the assembled rod iron in the step 3（3）Outer surface smear FRP composite materials.
10. the installation method of toughened internal stress according to claim 9, which is characterized in that the rod iron（3）With it is described pre-
It boxes out and is provided with mating screw thread, and the rod iron（3）It is connected in a manner of bolted between the preformed hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810556877.7A CN108729335B (en) | 2018-06-01 | 2018-06-01 | Steel-concrete combined section and installation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810556877.7A CN108729335B (en) | 2018-06-01 | 2018-06-01 | Steel-concrete combined section and installation method thereof |
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| CN108729335A true CN108729335A (en) | 2018-11-02 |
| CN108729335B CN108729335B (en) | 2023-08-22 |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050099657A (en) * | 2004-04-12 | 2005-10-17 | (주)석탑엔지니어링 | Installation structure for interior wall of box- typed segment structure |
| JP2008063803A (en) * | 2006-09-07 | 2008-03-21 | Jfe Engineering Kk | Composite floor slab formed of shape steel with inner rib, composite floor slab bridge, or composite girder bridge |
| CN101831866A (en) * | 2010-05-11 | 2010-09-15 | 天津市市政工程设计研究院 | Steel-concrete joint section structure of beams |
| CN202116971U (en) * | 2011-04-08 | 2012-01-18 | 湖北省交通规划设计院 | Structure of prefabricated split profile steel-concrete hybrid beam combined part |
| CN104831637A (en) * | 2015-05-31 | 2015-08-12 | 长安大学 | Steel beam inserted type steel-concrete combined section construction of composite beam |
| CN105040568A (en) * | 2015-08-26 | 2015-11-11 | 长安大学 | Non-geocell steel-concrete joint section structure of hybrid girder bridge |
| CN105672113A (en) * | 2016-01-22 | 2016-06-15 | 山东大学 | Reinforced concrete combined part structure on lower flange of corrugated steel web and construction method of reinforced concrete combined part structure |
| CN208563079U (en) * | 2018-06-01 | 2019-03-01 | 景洪市橄榄坝至景哈乡澜沧江大桥建设指挥部 | Mix the steel reinforced concrete connecting structure of bridge |
-
2018
- 2018-06-01 CN CN201810556877.7A patent/CN108729335B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050099657A (en) * | 2004-04-12 | 2005-10-17 | (주)석탑엔지니어링 | Installation structure for interior wall of box- typed segment structure |
| JP2008063803A (en) * | 2006-09-07 | 2008-03-21 | Jfe Engineering Kk | Composite floor slab formed of shape steel with inner rib, composite floor slab bridge, or composite girder bridge |
| CN101831866A (en) * | 2010-05-11 | 2010-09-15 | 天津市市政工程设计研究院 | Steel-concrete joint section structure of beams |
| CN202116971U (en) * | 2011-04-08 | 2012-01-18 | 湖北省交通规划设计院 | Structure of prefabricated split profile steel-concrete hybrid beam combined part |
| CN104831637A (en) * | 2015-05-31 | 2015-08-12 | 长安大学 | Steel beam inserted type steel-concrete combined section construction of composite beam |
| CN105040568A (en) * | 2015-08-26 | 2015-11-11 | 长安大学 | Non-geocell steel-concrete joint section structure of hybrid girder bridge |
| CN105672113A (en) * | 2016-01-22 | 2016-06-15 | 山东大学 | Reinforced concrete combined part structure on lower flange of corrugated steel web and construction method of reinforced concrete combined part structure |
| CN208563079U (en) * | 2018-06-01 | 2019-03-01 | 景洪市橄榄坝至景哈乡澜沧江大桥建设指挥部 | Mix the steel reinforced concrete connecting structure of bridge |
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| CN108729335B (en) | 2023-08-22 |
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