CN109914216A - A kind of assembled box beam combined type node across ultra-high performance concrete greatly and attaching method thereof - Google Patents
A kind of assembled box beam combined type node across ultra-high performance concrete greatly and attaching method thereof Download PDFInfo
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- CN109914216A CN109914216A CN201910246003.6A CN201910246003A CN109914216A CN 109914216 A CN109914216 A CN 109914216A CN 201910246003 A CN201910246003 A CN 201910246003A CN 109914216 A CN109914216 A CN 109914216A
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- 239000011374 ultra-high-performance concrete Substances 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 13
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 39
- 239000010959 steel Substances 0.000 claims abstract description 39
- 239000004567 concrete Substances 0.000 claims abstract description 19
- 238000003032 molecular docking Methods 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 13
- 238000013461 design Methods 0.000 claims abstract description 7
- 238000009408 flooring Methods 0.000 claims description 18
- 239000002689 soil Substances 0.000 claims description 4
- 239000008267 milk Substances 0.000 claims description 3
- 210000004080 milk Anatomy 0.000 claims description 3
- 235000013336 milk Nutrition 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 27
- 238000009434 installation Methods 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000011065 in-situ storage Methods 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 4
- 230000015271 coagulation Effects 0.000 description 3
- 238000005345 coagulation Methods 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000004574 high-performance concrete Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000011900 installation process Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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- Bridges Or Land Bridges (AREA)
Abstract
Assembled disclosed by the invention box beam combined type node across ultra-high performance concrete greatly, including box beam main body and prestressed draw-bar；Zigzag connector is set as at box beam main body docking, the pre-buried protruding bar of the second interface of zigzag connector, pre-buried prestressed draw-bar through-hole behind the first interface to zigzag connector of zigzag connector, box beam main body passes through pre-buried protruding bar, prestressed draw-bar through-hole and its connection of corresponding prestressed draw-bar, the filling of junction concrete grouting material.It further include steel anchor block linked system, including L shape steel anchor block and pretension bolt, steel anchor block are arranged in above the zigzag connector of box beam main body, pretension bolt is arranged on steel anchor block.And the connection method of above-mentioned assembled box beam combined type node across ultra-high performance concrete greatly, the configuration of the present invention is simple, design rationally, convenient transport, short construction period, quality height, stress performance, excellent durability and later maintenance it is low, transport it is low with installation cost.
Description
Technical field
The present invention relates to technical field of bridge engineering more particularly to a kind of assembled box beam groups across ultra-high performance concrete greatly
Box-like node and attaching method thereof.
Background technique
Currently, the bridge construction in China mainly uses traditional cast in situs construction or precast beam end concatenation construction.It passes
The cast in situs of system is constructed makes component can satisfy bearing requirements by rear pouring concrete or grouting technique.The coagulation poured after but
There are more wet construction when soil construction, the duration is too long, and once damages and be also not easy to repair, and economic benefit is lower.Compared to
Cast in situs construction, the single mechanical connection construction of precast beam is more convenient, Large Precast Members transportation cost height and installation process
Complexity, and prefabricated components bearing capacity is insufficient, the anti-seismic performance of seam crossing is undesirable, is easy to happen under mechanical load effect crisp
Property destroy, a variety of factors limit packaged type bridges in science of bridge building application and development.It can be seen that solving bridge construction
The problem of middle construction period and construction quality contradict, it is particularly significant to the development and progress of science of bridge building.
Reasonable structure design can substantially mitigate the own wt of prefabricated case beam, keep prefabricated components lighter, reduce
To the requirement of large lifting equipment in transportation cost and installation process.Ultra-high performance concrete (UHPC, Ultra High
Performance Concrete) component compared to ordinary concrete member have good working performance, be mainly reflected in, intensity
It is high, from heavy and light, long service life, good fluidity etc..In addition, the mode of on-site consolidation can be used in partial precast structure, into
One step reduces the difficulty in transport and hoisting process.
The present invention considers traditional unit construction bridge girder connection connection type, and there are above-mentioned deficiencies and limitation and state to live
Energetically support of the portion in terms of assembled architecture is built, focuses on solving construction period and the problem of construction quality contradicts, from component
Design and the defect of cast in situs are started with, to shorten construction period, improve architecture quality, reduce component conveying cost and install hardly possible
Degree is target, proposes a kind of assembled box beam across UHPC greatly and combined joint connection method.Short construction period of the present invention, quality
Height, stress performance and excellent durability, convenient transport, construction and installation cost are low, meet the development of the current building trade in China
Demand.
Summary of the invention
It is an object of the invention in view of the above-mentioned problems of the prior art, provide a kind of simple structure and reasonable design,
Convenient transport, short construction period, quality height, stress performance, excellent durability and later maintenance are low, transport low with installation cost
Assembled combined type node across concrete box girder greatly and attaching method thereof.
The technical solution adopted by the present invention is that assembled combined type node across concrete box girder greatly, including it is box beam main body, pre-
Stress pull rod and steel anchor block linked system；Pre-buried protruding bar and prestressed draw-bar through-hole are provided at box beam main body docking；
Steel anchor block linked system includes L shape steel anchor block and pretension bolt, and steel anchor block is arranged at the docking of box beam main body, is pre-tightened
Bolt is arranged on steel anchor block；Box beam main body by steel anchor block linked system, pre-buried protruding bar, prestressed draw-bar hole and
Its corresponding prestressed draw-bar connection, the filling of junction concrete grouting material.
The box beam main body is made of hollow cabinet bottom plate, web and floorings, connects at box beam main body docking for zigzag
Head.
The second interface of zigzag connector is arranged in the prestressed draw-bar through-hole and/or protruding bar, described pre-buried outer
It stretches reinforcing bar and/or the first interface of zigzag connector is arranged in prestressed draw-bar hole.
One face of the steel anchor block is arranged on zigzag connector.
The concrete grouting material is ultra-high performance concrete grouting material.
Web, bottom plate and floorings in the box beam main body are that ultra-high performance concrete is prefabricated.
There are grouting mouths at the zigzag connector docking of web, bottom plate and floorings in the box beam main body.
The connection method of assembled box beam combined type node across ultra-high performance concrete greatly, comprising the following steps:
1) factory-made component: bottom plate, web and the floorings of box beam main body are pre-formed in factory's progress, and box beam main body connects
Zigzag connector is prefabricated at head, the pre-buried protruding bar of the second interface of zigzag connector, the first interface of zigzag connector to Z
Pre-buried prestressed draw-bar through-hole behind font connector, pre-buried steel anchor block above zigzag connector；
2) installs case beam body: steel anchor block pre-buried at two side box beam main body docking is aligned, and is connected by pretension bolt,
Adjustment bolt carries out initial stage overlap joint；By prestressed draw-bar through-hole alignment pre-buried in two side box beam main bodys, behind zigzag connector
It is inserted into prestressed draw-bar；By protruding bar docking pre-buried in two side box beam main bodys；Finally, template is put in outside zigzag connector
Side, by being in the milk, mouth internally pours ultra-high performance concrete grouting material, fills up splicing groove, reaches design requirement to wet seam
Intensity after, the deformed bar in tensioning box beam main body.
The beneficial effects of the present invention are: the present invention is pre-buried outer using steel anchor block linked system, prestressed draw-bar, overlap joint
Reinforcing bar is stretched, and pours a variety of connection types combination connection of the wet seam of ultra-high performance concrete, keeps box beam main body seam very firm
Gu reliable.Compared to connection types such as single pre-buried protruding bar overlap joint, prestressed draw-bars, this more combination connecting modes are more
Firm and durable, and pouring ultra-high performance concrete makes this seam have preferably stress performance and stability.
The connector of the web of box beam main body, bottom plate and floorings is made as zigzag connector by the present invention in advance, is to place steel
Anchor block linked system, while the area of concreting has also been enlarged, greatly improve construction quality.Meanwhile prestressing force
Pull rod and steel anchor block linked system also ensure engineering stability when later period concrete curing.To ensure that engineering is more pacified
Entirely, seam is more reliable.
The present invention by steel anchor block and the overlap joint pre-buried connecting node for being placed in box beam main body of reinforcing bar, apply by the scene of simplifying
Work step is rapid, shortens the construction time, improves construction efficiency.
All components of box beam main body of the present invention are formed by ultra-high performance concrete is prefabricated, and ultra-high performance concrete resists
Compressive Strength, tensile strength and toughness are all much higher than normal concrete and high performance concrete so that the present invention have it is excellent
Stress performance.Meanwhile the durability of ultra-high performance concrete, up to 100 years or more, this makes wearability of the invention, impervious
Property, the endurance qualities such as frost resistance are significantly larger than normal concrete precast beam.
In conclusion the present invention is combined using stem grafting seam with wet seam, do not need using machines such as steel plate and chemical bolts
Tool structure is suitable for more complex environment, effectively prevents mentioning because the extraneous factors such as temperature humidity are destruction caused by structure
High contact endurance quality.Simultaneously as node has had been provided with certain stability and anti-pressure ability, so there is no need to equal concrete
Curing period, terminates, that is, can proceed with next step construction operation, simplifies site operation step, substantially reduces the duration.
Detailed description of the invention
The present invention is described in further detail for embodiment in reference to the accompanying drawing, but does not constitute to of the invention
Any restrictions.
Fig. 1 is structure sectional view at box beam main body docking of the present invention.
Fig. 2 is box beam agent structure schematic diagram of the present invention.
Fig. 3 is box beam main body top view of the present invention.
Fig. 4 is zigzag contact cross-section schematic diagram of the present invention.
Fig. 5 is steel anchor block linked system schematic diagram of the present invention.
Appended drawing reference: 1, box beam main body；2, steel anchor block；3, pre-buried protruding bar, 4, prestressed draw-bar through-hole, 5, pre-
Stress pull rod, 6, pretension bolt, 7, pretension bolt connect hole, 8, zigzag connector, 9, grouting mouth, 10, pouring area；
101, web, 102, bottom plate, 103, floorings；
801, the first interface, the 802, second interface, 803, above zigzag connector, 804, behind zigzag connector.
Specific embodiment
Refering to attached drawing 1, attached drawing 2 and attached drawing 4, assembled of the present invention combined type node across concrete box girder greatly, including box beam
Main body 1 and prestressed draw-bar 5；Zigzag connector 8, the second interface 802 of zigzag connector 8 are set as at 1 docking of box beam main body
First interface 801 of pre-buried protruding bar 3, zigzag connector 8 arrives pre-buried prestressed draw-bar through-hole 4 behind zigzag connector 8, case
Beam body 1 is connected by pre-buried protruding bar 3, prestressed draw-bar through-hole 4 and its corresponding prestressed draw-bar 5, junction coagulation
Native grouting material filling.
As a further improvement, the invention also includes steel anchor block linked system, (referring to attached drawing 5) includes L shape steel anchor
Gu block 2 and pretension bolt 7, steel anchor block 2 is arranged in 803 above the zigzag connector of box beam main body 1, and pretension bolt 7 is arranged in steel
On anchor block 2.
The connector of the web 101 of box beam main body 1, bottom plate 102 and floorings 103 is made as zigzag connector 8 by the present invention in advance,
It is while the area of concreting to have also been enlarged to place steel anchor block linked system, greatly improves construction quality.
Meanwhile the engineering stability of prestressed draw-bar 5 and steel anchor block linked system when also ensuring later period concrete curing.To protect
It is safer engineering is demonstrate,proved, seam is more reliable.
The present invention pours superelevation using steel anchor block linked system, prestressed draw-bar 5, the pre-buried protruding bar 3 of overlap joint
A variety of connection types of the energy wet seam of concrete combine connection, keep 1 seam of box beam main body very solid and reliable.It is pre- compared to single
The connection types such as the overlap joint of protruding bar 3, prestressed draw-bar 5 are buried, this more combination connecting modes are stronger durable, and pour super
High performance concrete makes this seam have preferably stress performance and stability.
As a further improvement, (referring to attached drawing 2) box beam main body 1 of the present invention by web 101, bottom plate 102 and bridge
Panel 103 be prefabricated into lead to cabinet.
Further, the concrete grouting material is ultra-high performance concrete grouting material.
Further, web 101, bottom plate 102 and the floorings 103 in the box beam main body 1 are very-high performance coagulation
Soil is prefabricated.Compression strength, the tension of ultra-high performance concrete (UHPC, Ultra High Performance Concrete) are strong
Degree and toughness are all much higher than normal concrete and high performance concrete, so that the present invention has excellent stress performance.Together
When, the durability of ultra-high performance concrete made wearability of the invention up to 100 years or more, and impervious, frost resistance etc. is resistance to
Long performance is significantly larger than normal concrete precast beam.
As a further improvement, the web 101 in box beam main body 1 of the present invention, bottom plate 102 and floorings 103Z word
There are grouting mouth 9(referring to attached drawing 3 at 8 docking of shape connector).
The connection method of assembled of the present invention box beam combined type node across ultra-high performance concrete greatly, comprising the following steps:
1) factory-made component: web 101, bottom plate 102 and the floorings 103 of box beam main body 1 carry out pre-formed, case in factory
The joint of beam body 1 is prefabricated into zigzag connector 8, and the pre-buried protruding bar 3 of 8 second interface of zigzag connector 802, zigzag connects
First 8 the first interface 801 arrives 804 pre-buried prestressed draw-bar through-holes 4 behind zigzag connector, and 803 is pre-buried above zigzag connector
Steel anchor block 2；
2) installs case beam body 1: steel anchor block 2 pre-buried at two side box beam main bodys, 1 docking is aligned, and passes through pretension bolt 7
Connection, adjustment pretension bolt 7 carry out initial stage overlap joint；Prestressed draw-bar through-hole 4 pre-buried in two side box beam main bodys 1 is aligned, from Z
804 insertion prestressed draw-bar 5 behind font connector；By protruding bar docking pre-buried in two side box beam main bodys 1；Finally, by mould
Plate is put in 8 outside of zigzag connector, and by being in the milk, mouth 9 internally pours ultra-high performance concrete grouting material, fills up splicing groove,
Deformed bar after wet seam reaches the intensity of design requirement, in tensioning box beam main body 1.
Installation implementation process of the invention, firstly, when factory-made component, by 1 median ventral plate 101 of box beam main body, bottom plate 102
It is prefabricated into zigzag connector 8 with the joint of floorings 103,803 pre-buried a certain number of steel anchor blocks on zigzag connector
2, it is provided with pretension bolt on steel anchor block 2 and connects hole 7 or access slot, after the first interface 801 to zigzag connector of zigzag connector 8
Reserve a certain number of prestressed draw-bar through-holes 4 in face 804.It is pre-buried a certain number of pre- in 8 second interface 802 of zigzag connector
Bury protruding bar 3.It is reserved with and pours at 8 docking of zigzag connector of the web 101 of box beam main body 1, bottom plate 102 and floorings 103
Build hole.First two box beam main bodys 1 are docked in construction, the first step, web 101, bottom plate 102 and bridge floor by box beam main body 1
It is aligned on 803 steel anchor block 2 above zigzag connector on plate 103, guarantees that pretension bolt connects hole 7 or access slot is aligned and is put into pre-
Tight bolt 7 is fixed, tightens the preliminary fixed case beam body 1 of pretension bolt 7；Second step, web 101, bottom plate by box beam main body 1
102 and floorings 103 on zigzag connector 8 the first interface 801 it is logical to 804 pre-buried prestressed draw-bars behind zigzag connector
Hole 4 is aligned, from 804 insertion prestressed draw-bar 5 behind zigzag connector；Third step, by the pre-buried overhanging of two prefabricated case beam main bodys 1
Reinforcing bar 3 carries out overlap joint processing, reinforces the bonding strength between box beam main body 1；Finally, in web 101, the bottom plate of box beam main body 1
102 and floorings 103 8 docking of zigzag connector at 10 domain of pouring area with template block outside, pour very-high performance from pouring hole
Concrete is simultaneously conserved；So far connecting node construction of the present invention is completed.The construction of next stage can be carried out, it is effective to shorten
Duration, but the quality of engineering is not influenced.
In conclusion the present invention is combined using stem grafting seam with wet seam, do not need using machines such as steel plate and chemical bolts
Tool structure is suitable for more complex environment, effectively prevents mentioning because the extraneous factors such as temperature humidity are destruction caused by structure
High contact endurance quality.Simultaneously as invention node has had been provided with certain stability and anti-pressure ability, so there is no need to equal mixed
Solidifying soil curing period, terminates, that is, can proceed with next step construction operation, simplify site operation step, substantially reduce the duration.
Embodiment provided above is better embodiment of the invention, only is used to facilitate to illustrate the present invention, not to this hair
It is bright to make any form of restriction, any those of ordinary skill in the art, if not departing from the proposed skill of the present invention
In the range of art feature, using the equivalent embodiment for locally changing or modifying made by disclosed technology contents, and
Without departing from technical feature content of the invention, in the range of still falling within the technology of the present invention feature.
Claims (7)
1. a kind of assembled box beam combined type node across ultra-high performance concrete greatly, it is characterised in that: including box beam main body and in advance
Stress pull rod；Zigzag connector, the pre-buried protruding bar of the second interface of zigzag connector, Z-shaped are set as at box beam main body docking
Pre-buried prestressed draw-bar through-hole behind the first interface to zigzag connector of shape connector, box beam main body by pre-buried protruding bar,
Prestressed draw-bar through-hole and its connection of corresponding prestressed draw-bar, the filling of junction concrete grouting material.
2. assembled as described in claim 1 box beam combined type node across ultra-high performance concrete greatly, it is characterised in that: further include
The zigzag connector of box beam main body is arranged in steel anchor block linked system, including L shape steel anchor block and pretension bolt, steel anchor block
Above, pretension bolt is arranged on steel anchor block.
3. assembled as described in claim 1 box beam combined type node across ultra-high performance concrete greatly, it is characterised in that: box beam master
Body by bottom plate, web and floorings be prefabricated into lead to cabinet.
4. assembled as described in claim 1 box beam combined type node across ultra-high performance concrete greatly, it is characterised in that: described mixed
Solidifying soil grouting material is ultra-high performance concrete grouting material.
5. assembled as described in claim 1 box beam combined type node across ultra-high performance concrete greatly, it is characterised in that: box beam master
Web, bottom plate and floorings on body are that ultra-high performance concrete is prefabricated.
6. assembled as described in claim 1 box beam combined type node across ultra-high performance concrete greatly, it is characterised in that: box beam master
There are grouting mouths at the zigzag connector docking of web, bottom plate and floorings on body.
7. a kind of connection of the box beam combined type node across ultra-high performance concrete greatly of the assembled as described in claim 1 to 6 is any
Method, comprising the following steps:
1) factory-made component: bottom plate, web and the floorings of box beam main body are pre-formed in factory's progress, and box beam main body connects
Zigzag connector is prefabricated at head, the pre-buried protruding bar of the second interface of zigzag connector, the first interface of zigzag connector to Z
Pre-buried prestressed draw-bar through-hole behind font connector, pre-buried steel anchor block above zigzag connector；
2) installs case beam body: steel anchor block pre-buried at two side box beam main body docking is aligned, and is connected by pretension bolt,
Adjustment bolt carries out initial stage overlap joint；By prestressed draw-bar through-hole alignment pre-buried in two side box beam main bodys, behind zigzag connector
It is inserted into prestressed draw-bar；By protruding bar docking pre-buried in two side box beam main bodys；Finally, template is put in outside zigzag connector
Side, by being in the milk, mouth internally pours ultra-high performance concrete grouting material, fills up splicing groove, reaches design requirement to wet seam
Intensity after, the deformed bar in tensioning box beam main body.
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| CN201910246003.6A CN109914216B (en) | 2019-03-29 | 2019-03-29 | Assembled large-span ultra-high-performance concrete box girder combined node and connecting method thereof |
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| CN201910246003.6A CN109914216B (en) | 2019-03-29 | 2019-03-29 | Assembled large-span ultra-high-performance concrete box girder combined node and connecting method thereof |
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| CN110434988A (en) * | 2019-07-10 | 2019-11-12 | 上海市机电设计研究院有限公司 | Polygon tower concrete prefabricated parts and its adjustable mould with fixed corner |
| CN111395168A (en) * | 2020-03-13 | 2020-07-10 | 中铁六局集团广州工程有限公司 | Continuous rigid frame separation type 0# block temporary filling device and construction method |
| CN112832111A (en) * | 2021-01-14 | 2021-05-25 | 中铁七局集团第二工程有限公司 | Prestressed concrete combined continuous box girder bridge structure system |
| CN113585036A (en) * | 2021-06-21 | 2021-11-02 | 中交二航局成都城市建设工程有限公司 | Small box girder with wet joint bottom die and construction method thereof |
| CN114775445A (en) * | 2022-05-25 | 2022-07-22 | 长沙市公路桥梁建设有限责任公司 | Prefabricated bridge segment splicing structure and splicing method |
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