CN208792133U - A kind of prefabricated case beam and continuous bridge - Google Patents
A kind of prefabricated case beam and continuous bridge Download PDFInfo
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- CN208792133U CN208792133U CN201821461338.7U CN201821461338U CN208792133U CN 208792133 U CN208792133 U CN 208792133U CN 201821461338 U CN201821461338 U CN 201821461338U CN 208792133 U CN208792133 U CN 208792133U
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- top plate
- prefabricated case
- web
- case beam
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Abstract
The utility model provides a kind of prefabricated case beam and continuous bridge, belongs to science of bridge building field.Prefabricated case beam includes top plate, web and bottom plate, and top plate is connect with bottom plate by web, and centre-height is less than both ends height to web along the longitudinal direction, for making the span centre deck-molding for the spanning being made of multiple prefabricated case beams be less than fulcrum deck-molding to mitigate beam bridge self weight.Continuous bridge includes the spanning being made of multiple above-mentioned prefabricated case beams.This prefabricated case beam can reduce self weight, promote span ability, and save the construction time.For this continuous bridge from heavy and light, span ability is strong, and construction speed is fast.
Description
Technical field
The utility model relates to science of bridge building fields, in particular to a kind of prefabricated case beam and continuous bridge.
Background technique
With the fast development of China's urban road and high-grade highway, to the span ability, speed of application and beauty of bridge
More stringent requirements are proposed for the property seen.The bridge of Medium Span uses the deck-moldings box beam such as prefabricated at present, is self-possessed larger, across energy
Power is limited；And long-span prestressed concrete continuous bridge uses cantilever cast-in-place or the change deck-molding box beam of support cast-in-place, construction is multiple
When incidentals.
Utility model content
The purpose of this utility model includes providing a kind of prefabricated case beam, can reduce self weight, promotes span ability, and save
Save the construction time.
The another object of the utility model includes providing a kind of continuous bridge, and from heavy and light, span ability is strong, and builds
Speed is fast.
The embodiments of the present invention are achieved in that
A kind of prefabricated case beam comprising top plate, web and bottom plate, top plate are connect with bottom plate by web, and web is along longitudinal direction
Direction centre-height is less than both ends height, for making the span centre deck-molding for the spanning being made of multiple prefabricated case beams be less than fulcrum deck-molding
To mitigate beam bridge self weight.
Further, above-mentioned span centre deck-molding is the 3/5-4/5 of fulcrum deck-molding.
Further, a plurality of first longitudinal direction presstressed reinforcing steel duct is arranged in above-mentioned top plate, first longitudinal direction presstressed reinforcing steel duct
One end extends to the end face of top plate, and the other end of first longitudinal direction presstressed reinforcing steel duct extends to the top plate tension slot groove that top plate opens up
Mouthful.
Further, the transverse width of above-mentioned top plate stretching notch is 30-40 centimetres.
Further, laterally reinforcing bar is stretched out in setting first to above-mentioned top plate, for connecting the top plate of laterally adjacent prefabricated case beam；
Top plate longitudinally disposed second stretches out reinforcing bar, for connecting the top plate of longitudinally adjacent prefabricated case beam.
Further, above-mentioned web center and diaphragm plate is respectively set at web both ends 1/4, and diaphragm plate is laterally set
It sets third and stretches out reinforcing bar, for connecting the diaphragm plate of contiguous prefabricated box beam.
Further, a plurality of second longitudinal direction presstressed reinforcing steel duct, every second longitudinal direction prestressing force are set inside above-mentioned web
Longitudinal prestressing muscle is worn in muscle duct respectively.
Further, above-mentioned longitudinal prestressing muscle length is different, apart from the 1/4-2/5 of web both ends at beginning successively to
Upper bending simultaneously anchors.
Further, at least one above-mentioned longitudinal prestressing muscle both ends are bent upwards and extend to top plate, and web is in longitudinal direction
The intersection of presstressed reinforcing steel and top plate is equipped with web stretching notch.
A kind of continuous bridge comprising the spanning being made of multiple above-mentioned prefabricated case beams.
The beneficial effect of the utility model embodiment includes:
This prefabricated case beam includes top plate, web and bottom plate, and top plate is connect with bottom plate by web, web along the longitudinal direction in
Heart height is less than both ends height, for making the span centre deck-molding for the spanning being made of multiple prefabricated case beams be less than fulcrum deck-molding to mitigate
Beam bridge self weight.This prefabricated case beam can reduce self weight, promote span ability, and save the construction time.This continuous bridge include by
The spanning that multiple above-mentioned prefabricated case beams are constituted.For this continuous bridge from heavy and light, span ability is strong, and construction speed is fast.
Detailed description of the invention
It, below will be to use required in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
Attached drawing be briefly described, it should be understood that the following drawings illustrates only some embodiments of the utility model, therefore should not be by
Regard the restriction to range as, for those of ordinary skill in the art, without creative efforts, may be used also
To obtain other relevant attached drawings according to these attached drawings.
Fig. 1 is the structural schematic diagram at the first visual angle of prefabricated case beam in the utility model embodiment；
Fig. 2 is the partial enlarged view of prefabricated case beam end in the utility model embodiment；
Fig. 3 is the structural schematic diagram at the second visual angle of prefabricated case beam in the utility model embodiment；
Fig. 4 is the structural schematic diagram at prefabricated case beam third visual angle in the utility model embodiment；
Fig. 5 is prefabricated case beam end cross-sectional B cross-sectional view in the utility model embodiment；
Fig. 6 is prefabricated case beam middle part section C cross-sectional view in the utility model embodiment；
Fig. 7 is the utility model embodiment median ventral plate longitudinal prestressing muscle half across layout drawing (the other half is across symmetrical therewith)；
Fig. 8 is the structural schematic diagram of continuous bridge in the utility model embodiment.
Icon: 1- is longitudinal；2- is lateral；100- prefabricated case beam；110- top plate；112- first longitudinal direction presstressed reinforcing steel hole
Road；113- top plate ontology；114- first stretches out reinforcing bar；115- second stretches out reinforcing bar；116- top plate stretching notch；120-
Web；122- diaphragm plate；123- third stretches out reinforcing bar；124- second longitudinal direction presstressed reinforcing steel duct；126- longitudinal prestressing
Muscle；128- web stretching notch；130- bottom plate；200- continuous bridge；220- spanning.
Specific embodiment
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Usually here in attached drawing description and
The component of the utility model embodiment shown can be arranged and be designed with a variety of different configurations.
Therefore, requirement is not intended to limit to the detailed description of the embodiments of the present invention provided in the accompanying drawings below
The scope of the utility model of protection, but it is merely representative of the selected embodiment of the utility model.Based in the utility model
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all
Belong to the range of the utility model protection.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
In the description of the present invention, it should be noted that the orientation of the instructions such as term " on ", "lower", "inner" "outside"
Or positional relationship be based on the orientation or positional relationship shown in the drawings or the utility model product using when usually put
Orientation or positional relationship is merely for convenience of describing the present invention and simplifying the description, rather than the dress of indication or suggestion meaning
It sets or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to the utility model
Limitation.In addition, term " first ", " second ", " third " etc. are only used for distinguishing description, it is not understood to indicate or imply phase
To importance.
In the description of the present invention, it should also be noted that, unless otherwise clearly defined and limited, term " is set
Set ", " installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection,
Or it is integrally connected；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, intermediary can also be passed through
It is indirectly connected, can be the connection inside two elements.For the ordinary skill in the art, it can be managed with concrete condition
Solve the concrete meaning of above-mentioned term in the present invention.
First embodiment
Fig. 1, Fig. 2 and Fig. 3 are please referred to, the present embodiment provides a kind of prefabricated case beams 100 comprising top plate 110, web 120
With bottom plate 130, top plate 110 is connect with bottom plate 130 by web 120, and 1 direction centre-height is less than both ends to web 120 along longitudinal direction
Highly, the span centre deck-molding for making the spanning being made of multiple prefabricated case beams 100 is less than fulcrum deck-molding to mitigate beam bridge self weight.
Wherein, the 1 a plurality of first longitudinal direction presstressed reinforcing steel duct 112 of setting along longitudinal direction of top plate 110, and top plate 110 transversely 2
Reinforcing bar 114 is stretched out in setting first, and reinforcing bar 115 is stretched out in 1 setting second to top plate 110 along longitudinal direction.Specifically, top plate 110 includes top plate
Ontology 113, first stretches out reinforcing bar 114 and second and stretches out reinforcing bar 115.Top plate ontology 113 is rectangular slab, is leaned in top plate ontology 113
The part of two close end is arranged a plurality of first longitudinal direction presstressed reinforcing steel duct 112 arranged side by side, and the one of first longitudinal direction presstressed reinforcing steel duct 112
End extends to the end face of top plate ontology 113, and the other end of first longitudinal direction presstressed reinforcing steel duct 112 extends to top plate ontology 113 and opens
If top plate stretching notch 116.First longitudinal direction presstressed reinforcing steel duct 112 is with teeth close to the setting of the position of top plate stretching notch 116
Block, which needs the subsequent presstressed reinforcing steel being arranged in first longitudinal direction presstressed reinforcing steel duct 112 for anchoring, to meet stress
It is required that.The transverse width of top plate stretching notch 116 is 30-40 centimetres, to meet stress and facilitate manual operation.First longitudinal direction
Its quantity and length, 116 quantity of top plate stretching notch and first longitudinal direction prestressing force can be set as needed in presstressed reinforcing steel duct 112
112 quantity of muscle duct is corresponding.In the present embodiment, the quantity of first longitudinal direction presstressed reinforcing steel duct 112 at one end is 4, and
It is symmetrical, to meet stress and stability requirement.Two longitudinal sides of top plate ontology 113 are fixed with a plurality of lateral first
Reinforcing bar 114 is stretched out, the first stretching reinforcing bar 114 is used to connect the top plate of contiguous prefabricated box beam on lateral 2.The two of top plate ontology 113
A transverse side is fixed with a plurality of the second longitudinal stretching reinforcing bar 115, for connecting the top plate of contiguous prefabricated box beam on longitudinal 1.
Referring to figure 4., Fig. 5 and Fig. 6,1 direction centre-height is less than both ends height to web 120 along longitudinal direction, so that span centre beam
The 3/5-4/5 of a height of fulcrum deck-molding.Specifically, two pieces of 120 tops of web are fixedly connected on the bottom surface of top plate ontology 113 respectively,
120 lower edge of web is in the parabolic shape to arch up, to realize span centre deck-molding as the 3/5-4/5 of fulcrum deck-molding.Furthermore two pieces
The plate thickness at both ends of web 120 increases.
120 center of web and diaphragm plate 122 is respectively set at 120 both ends 1/4 of web, and cross is arranged in diaphragm plate 122
To third stretch out reinforcing bar 123, for connecting the diaphragm plate of contiguous prefabricated box beam.Longitudinally projecting steel is arranged in 120 both ends of the surface of web
Muscle is to connect the web of longitudinally adjacent prefabricated case beam.
Fig. 7 is please referred to, a plurality of second longitudinal direction presstressed reinforcing steel duct 124 is set inside web 120, every second longitudinal direction is answered in advance
Longitudinal prestressing muscle 126 is worn respectively in power muscle duct 124.Specifically, 126 length of longitudinal prestressing muscle is different, apart from abdomen
Start to be bent and anchor upwards in turn at 120 both ends 1/4-2/5 of plate.126 both ends of wherein at least one longitudinal prestressing muscle are upward
It is bent and extends to top plate 110, web 120 is equipped with web stretching notch in the intersection of longitudinal prestressing muscle 126 and top plate 110
128.Different quantity and length can be set as needed in longitudinal prestressing muscle 126, in the present embodiment, every block of web 120
6 longitudinal prestressing muscle 126 are set, wherein three both ends are intersected with top plate 110, thus 3 webs are arranged in every block of web 120
Stretching notch 128, to meet stress and stability requirement.
The two sides of bottom plate 130 are fixedly connected on two pieces of 120 bottoms of web, and the longitudinal edge line of 130 two sides of bottom plate is in span centre
It is slight bowed out, to connect web 120.Longitudinally projecting reinforcing bar is arranged to connect longitudinally adjacent prefabricated case beam in 130 both ends of the surface of bottom plate
Bottom plate.
It, in other embodiments, can also be in addition, prefabricated case beam 100 is poured by normal concrete in the present embodiment
It is poured using ultra-high performance concrete, to further decrease self weight, promotes span ability.
The working principle of prefabricated case beam 100 is: prefabricated case beam 100 includes top plate 110, web 120 and bottom plate 130, top plate
110 are connect with bottom plate 130 by web 120, and 1 direction centre-height is less than both ends height to web 120 along longitudinal direction, for making by more
The span centre deck-molding for the spanning that a prefabricated case beam 100 is constituted is less than fulcrum deck-molding to mitigate beam bridge self weight, and promotes span ability.Top
Transversely 2 the first stretching reinforcing bar 114 and third stretching reinforcing bar 123 is respectively set in diaphragm plate 122 on plate 110 and web 120, uses
With the contiguous prefabricated box beam of lateral connection.1 setting second stretches out reinforcing bar 115 and web 120 and bottom plate 130 to top plate 110 along longitudinal direction
The longitudinally projecting reinforcing bar of end face is used for longitudinally connected contiguous prefabricated box beam together.The first longitudinal direction presstressed reinforcing steel that top plate 110 is arranged
Duct 112 is for penetrating reinforcing bar at the scene with tensioning and pressure injection slurry.
By making web 120,1 centre-height is less than both ends height to prefabricated case beam 100 along longitudinal direction, realizes that span centre height is less than
Branch point height not only mitigates self weight, but also promotes span ability, also more beautiful.Furthermore prefabricated case beam 100 pour be
Prefabrication molding, is then transported to bridge construction scene and is built, saved province's construction time.
Second embodiment
Fig. 8 is please referred to, the present embodiment provides a kind of continuous bridges 200 comprising provided by multiple first embodiments pre-
The spanning 220 that box beam 100 processed is constituted.
Construction procedure using the assembled continuous bridge 200 of prefabricated case beam 100 is as follows:
Step 1: the structure point that Simply supported non-uniform becomes deck-molding precast box beam bridge is carried out according to the practical relevant design parameter of engineering
Analysis calculates and determines dependent cross-section size, presstressed reinforcing steel and regular reinforcement arrangement；
Step 2: prefabricated case beam 100 is made in factory；After concrete strength reaches the 90% of design strength, tensioning is just
Moment of flexure area prestressed strand (longitudinal prestressing muscle 126), slurry and wash-up tray beam bottom plate 130 in time in pressure injection presstressed reinforcing steel duct
Venthole；
Step 3: in the pier to have completed, placing temporary support on platform and install permanent support, prefabricated for installing by cross
Box beam 100；
Step 4: on laterally 2, adjacent top plate 110 laterally the first stretching reinforcing bar 114 is connected, adjacent diaphragm plate 122 is connected
Third stretch out reinforcing bar 123, composition one across；Meanwhile on longitudinal 1, guarantee that 112 front and back of first longitudinal direction presstressed reinforcing steel duct is right
Together, and first longitudinal direction presstressed reinforcing steel duct 112 is connected；
Step 5: the connection concrete and top plate of simple span diaphragm plate 122 are poured (not higher than+15 DEG C) when day temperature is minimum
110 connection concrete；
Step 6: (+15 DEG C are not higher than) when day temperature is minimum and pour continuous segment connector (including crossbeam at fulcrum) at fulcrum
Concrete；
Step 7: when concrete strength reaches the 90% of design strength, cast-in-place continuous segment hogging moment steel at tensioning fulcrum
Beam (scene be arranged in presstressed reinforcing steel) in first longitudinal direction presstressed reinforcing steel duct 112 and to first longitudinal direction presstressed reinforcing steel duct 112
Pressure injection slurry；
Step 8: removing temporary support, completes system transform, pours deck paving, complete other appurtenant works.
This continuous bridge 200 includes the spanning 220 that the prefabricated case beam 100 provided by multiple first embodiments is constituted, span centre
Deck-molding is less than fulcrum deck-molding, thus from heavy and light and span ability it is strong, while prefabricated case beam 100 is completed by factory, continuous beam
200 construction speed of bridge is fast.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (10)
1. a kind of prefabricated case beam, which is characterized in that including top plate, web and bottom plate, the top plate and the bottom plate are described in
Web connection, centre-height is less than both ends height to the web along the longitudinal direction, is made of for making multiple prefabricated case beams
Spanning span centre deck-molding be less than fulcrum deck-molding with mitigate beam bridge self weight.
2. prefabricated case beam according to claim 1, which is characterized in that the span centre deck-molding is the 3/ of the fulcrum deck-molding
?.
3. prefabricated case beam according to claim 1, which is characterized in that a plurality of first longitudinal direction presstressed reinforcing steel is arranged in the top plate
Duct, one end of the first longitudinal direction presstressed reinforcing steel duct extend to the end face of the top plate, the first longitudinal direction presstressed reinforcing steel
The other end in duct extends to the top plate stretching notch that the top plate opens up.
4. prefabricated case beam according to claim 3, which is characterized in that the transverse width of the top plate stretching notch is 30-
40 centimetres.
5. prefabricated case beam according to claim 1, which is characterized in that laterally reinforcing bar is stretched out in setting first to the top plate, uses
In the top plate for connecting laterally adjacent prefabricated case beam；The top plate longitudinally disposed second stretches out reinforcing bar, longitudinally adjacent pre- for connecting
The top plate of box beam processed.
6. prefabricated case beam according to claim 1, which is characterized in that the web longitudinal center and apart from the web two
It holds and diaphragm plate is respectively set at 1/4, and laterally setting third stretches out reinforcing bar to the diaphragm plate, for connecting contiguous prefabricated box beam
Diaphragm plate.
7. prefabricated case beam according to claim 1, which is characterized in that a plurality of second longitudinal direction is arranged inside the web and answers in advance
Power muscle duct wears longitudinal prestressing muscle in every second longitudinal direction presstressed reinforcing steel duct respectively.
8. prefabricated case beam according to claim 7, which is characterized in that the every longitudinal prestressing muscle length is different,
Start to be bent and anchor upwards in turn at the web both ends 1/4-2/5.
9. prefabricated case beam according to claim 8, which is characterized in that longitudinal prestressing muscle both ends described at least one are upward
It is bent and extends to the top plate, the web is equipped with web tensioning in the intersection of the longitudinal prestressing muscle and the top plate
Notch.
10. a kind of continuous bridge, which is characterized in that including by multiple prefabricated case beam structures described in any one of claim 1-9
At spanning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821461338.7U CN208792133U (en) | 2018-09-06 | 2018-09-06 | A kind of prefabricated case beam and continuous bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821461338.7U CN208792133U (en) | 2018-09-06 | 2018-09-06 | A kind of prefabricated case beam and continuous bridge |
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| Publication Number | Publication Date |
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| CN208792133U true CN208792133U (en) | 2019-04-26 |
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| CN201821461338.7U Expired - Fee Related CN208792133U (en) | 2018-09-06 | 2018-09-06 | A kind of prefabricated case beam and continuous bridge |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110438886A (en) * | 2019-08-20 | 2019-11-12 | 中国铁路设计集团有限公司 | A kind of railway precast segment spliced girder beam-ends processing structure and method |
| CN112523061A (en) * | 2020-11-24 | 2021-03-19 | 广西交通设计集团有限公司 | UHPC stiffened prestressed concrete box girder bridge structure and construction process thereof |
| CN113338161A (en) * | 2021-04-15 | 2021-09-03 | 广东省交通规划设计研究院集团股份有限公司 | Concrete box girder top surface prestress steel beam tensioning structure and construction method thereof |
| CN114622475A (en) * | 2022-01-14 | 2022-06-14 | 湖北省交通规划设计院股份有限公司 | Mid-span shaftless force connecting device of ground anchor type cable-stayed bridge and mounting method thereof |
-
2018
- 2018-09-06 CN CN201821461338.7U patent/CN208792133U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110438886A (en) * | 2019-08-20 | 2019-11-12 | 中国铁路设计集团有限公司 | A kind of railway precast segment spliced girder beam-ends processing structure and method |
| CN112523061A (en) * | 2020-11-24 | 2021-03-19 | 广西交通设计集团有限公司 | UHPC stiffened prestressed concrete box girder bridge structure and construction process thereof |
| CN112523061B (en) * | 2020-11-24 | 2022-06-14 | 广西交通设计集团有限公司 | UHPC stiffened prestressed concrete box girder bridge structure and construction process thereof |
| CN113338161A (en) * | 2021-04-15 | 2021-09-03 | 广东省交通规划设计研究院集团股份有限公司 | Concrete box girder top surface prestress steel beam tensioning structure and construction method thereof |
| CN114622475A (en) * | 2022-01-14 | 2022-06-14 | 湖北省交通规划设计院股份有限公司 | Mid-span shaftless force connecting device of ground anchor type cable-stayed bridge and mounting method thereof |
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