CN209941467U - Assembled stride ultra high performance concrete box girder combination formula node greatly - Google Patents
Assembled stride ultra high performance concrete box girder combination formula node greatly Download PDFInfo
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- CN209941467U CN209941467U CN201920411356.2U CN201920411356U CN209941467U CN 209941467 U CN209941467 U CN 209941467U CN 201920411356 U CN201920411356 U CN 201920411356U CN 209941467 U CN209941467 U CN 209941467U
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- 239000011374 ultra-high-performance concrete Substances 0.000 title claims abstract description 28
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 40
- 239000010959 steel Substances 0.000 claims abstract description 40
- 210000001503 joint Anatomy 0.000 claims abstract description 22
- 239000004567 concrete Substances 0.000 claims abstract description 19
- 238000004873 anchoring Methods 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 10
- 239000002131 composite material Substances 0.000 claims 6
- 238000009434 installation Methods 0.000 abstract description 6
- 238000013461 design Methods 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 19
- 238000000034 method Methods 0.000 description 5
- 238000011161 development Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 239000011178 precast concrete Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000004574 high-performance concrete Substances 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
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Abstract
The utility model discloses an assembled long-span ultra-high performance concrete box girder combined node, which comprises a box girder main body and a prestressed pull rod; the butt joint of the box girder main body is provided with a Z-shaped joint, an external extending steel bar is embedded in a second butt joint surface of the Z-shaped joint, a prestressed pull rod through hole is embedded from a first butt joint surface of the Z-shaped joint to the back surface of the Z-shaped joint, the box girder main body is connected through the embedded external extending steel bar, the prestressed pull rod through hole and a corresponding prestressed pull rod, and concrete grouting material is filled in the joint. The box girder comprises a box girder body and is characterized by further comprising a steel anchoring block connecting system which comprises an L-shaped steel anchoring block and a pre-tightening bolt, wherein the steel anchoring block is arranged on the Z-shaped joint of the box girder body, and the pre-tightening bolt is arranged on the steel anchoring block. The box girder main body is a hollow box body prefabricated by a bottom plate, a web plate and a bridge deck plate. The utility model has the advantages of simple structure and reasonable design, the transportation is convenient, the high quality, atress performance, durability are good and the later maintenance is low, and transportation and installation cost are low.
Description
Technical Field
The utility model relates to a bridge engineering technical field especially relates to an assembled stride ultra high performance concrete box girder combination formula node greatly.
Background
At present, the traditional cast-in-place construction or precast beam end splicing construction is mainly adopted in bridge construction in China. Traditional cast-in-place construction enables the component to meet the load bearing requirements through post-cast concrete or grouting techniques. However, the post-cast concrete has more wet operation during construction, the construction period is too long, and the post-cast concrete is not easy to repair once damaged and has lower economic benefit. Compared with the field pouring construction, the single mechanical connection construction of the prefabricated beam is convenient, the transportation cost of the large prefabricated part is high, the installation process is complex, the bearing capacity of the prefabricated part is insufficient, the anti-seismic performance of the joint is not ideal, brittle failure easily occurs under the action of mechanical load, and various factors limit the application and development of the assembled bridge in bridge engineering. Therefore, the method solves the problem that the construction period and the engineering quality are contradictory in bridge construction, and is very important for the development and progress of bridge engineering.
Reasonable structural design can alleviate the self weight of precast box girder by a wide margin, makes prefabricated component lighter, reduces the cost of transportation and the requirement to large-scale hoisting equipment in the installation. Compared with common Concrete members, the Ultra High Performance Concrete (UHPC) member has good working performance, and is mainly reflected in the aspects of high strength, light dead weight, long service life, good fluidity and the like. In addition, some prefabricated construction can adopt the mode of assembling on the spot, further reduce the degree of difficulty in transportation and the hoist and mount process.
The utility model discloses consider that traditional assembled bridge node connected mode has foretell not enough and limitation to and the country is lived the strong support of establishing the portion in the aspect of the assembled building, solve the problem of construction period and engineering quality contradiction emphatically, start with from the defect of component design and site pouring, with shorten engineering period, improve the construction quality, reduce component cost of transportation and the installation degree of difficulty as the target, provided an assembled stride UHPC case roof beam and combination node connection method greatly. The utility model discloses construction cycle is short, and the high quality, atress performance and durability are good, and the transportation is convenient, construction and installation cost are low, satisfy the development demand of the present building trade of china.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to the problem that above-mentioned prior art exists, provide a simple structure, reasonable in design, the transportation is convenient, construction cycle is short, the high quality, atress performance, durability are good and the later maintenance is low, and transportation and the low assembled of installation cost stride concrete box girder combination formula node greatly.
The technical scheme adopted by the utility model is that the assembled long-span concrete box girder combined node comprises a box girder main body and a prestressed pull rod; the butt joint of the box girder main body is provided with a Z-shaped joint, an external extending steel bar is embedded in a second butt joint surface of the Z-shaped joint, a prestressed pull rod through hole is embedded from a first butt joint surface of the Z-shaped joint to the back surface of the Z-shaped joint, the box girder main body is connected through the embedded external extending steel bar, the prestressed pull rod through hole and a corresponding prestressed pull rod, and concrete grouting material is filled in the joint.
The box girder comprises a box girder body and is characterized by further comprising a steel anchoring block connecting system which comprises an L-shaped steel anchoring block and a pre-tightening bolt, wherein the steel anchoring block is arranged on the Z-shaped joint of the box girder body, and the pre-tightening bolt is arranged on the steel anchoring block.
The box girder main body is a hollow box body prefabricated by a bottom plate, a web plate and a bridge deck plate.
The concrete grouting material is an ultrahigh-performance concrete grouting material.
And the web plate, the bottom plate and the bridge deck plate on the box girder main body are all prefabricated by ultra-high performance concrete.
And grouting ports are reserved at the joint of the web plate on the box girder main body, the bottom plate and the Z-shaped joint of the bridge deck.
The beneficial effects of the utility model reside in that: the utility model discloses a steel anchor piece connection system, prestressing force pull rod, the pre-buried overhanging reinforcing bar of overlap joint to pour the multiple connected mode built-up connection of the wet seam of ultra high performance concrete, make the case roof beam main part seam very firm reliable. Compared with single connection modes such as pre-buried overhanging steel bar lap joint and prestressed pull rods, the multi-combination connection mode is firmer and more durable, and the ultra-high performance concrete is poured to ensure that the joint has better stress performance and stability.
The utility model discloses connect the joint prefabrication of web, bottom plate and decking of case roof beam main part for the zigzag, be for placing steel anchor piece connected system, also enlarged concrete placement's area simultaneously, greatly improved engineering quality. Meanwhile, the connecting system of the prestressed pull rod and the steel anchoring block also ensures the engineering stability during later concrete curing. Thereby ensuring safer engineering and more reliable seam.
The utility model discloses all components of case roof beam main part are formed by the ultra high performance concrete is prefabricated, and the compressive strength, tensile strength and the toughness of ultra high performance concrete all are far above ordinary concrete and high performance concrete, thereby make the utility model discloses there is excellent atress performance. Simultaneously, the durability of ultra high performance concrete can reach more than 100 years, and this makes the utility model discloses a durability such as wearability, impermeability, freezing resistance is higher than ordinary precast concrete roof beam far away.
To sum up, the utility model discloses a dry joint seam combines together with wet seam, need not use mechanical structure such as steel sheet and chemical bolt, and adaptable more complicated environment has effectively avoided the destruction of constructing because of external factors such as temperature humidity to the knot, has improved contact durability.
Drawings
The present invention will be described in further detail with reference to the following examples, which are not intended to limit the invention.
Fig. 1 is a structural sectional view of the butt joint of the box girder main bodies of the invention.
Fig. 2 is a schematic structural diagram of the main body of the box girder.
Figure 3 is a top view of the main body of the box girder of the present invention.
FIG. 4 is a cross-sectional view of a Z-joint of the present invention.
Fig. 5 is a schematic view of the steel anchor block connection system of the present invention.
Reference numerals: 1. a box girder main body; 2. a steel anchor block; 3. Embedding overhanging reinforcing steel bars, 4, prestressed pull rod through holes, 5, prestressed pull rods, 6, pre-tightening bolts, 7, pre-tightening bolt connection holes, 8, Z-shaped joints, 9, grouting ports, 10 and a pouring area;
101. a web plate 102, a bottom plate 103 and a bridge deck plate;
801. a first mating surface 802, a second mating surface 803, above the zigzag joint, 804, behind the zigzag joint.
Detailed Description
Referring to the attached drawings 1, 2 and 4, the assembled long-span concrete box girder combined node comprises a box girder main body 1 and a prestressed pull rod 5; the butt joint of the box girder main body 1 is provided with a Z-shaped joint 8, an external extending steel bar 3 is embedded in a second butt joint surface 802 of the Z-shaped joint 8, a prestressed pull rod through hole 4 is embedded from a first butt joint surface 801 of the Z-shaped joint 8 to a Z-shaped joint rear surface 804, the box girder main body 1 is connected through the embedded external extending steel bar 3, the prestressed pull rod through hole 4 and a corresponding prestressed pull rod 5, and concrete grouting material is filled in the joint.
As a further improvement, the utility model discloses still include steel anchor block connected system, (see fig. 5) including L shape steel anchor block 2 and pretension bolt 6, steel anchor block 2 sets up on the zigzag of case roof beam main part 1 connects 803, and pretension bolt 6 sets up on steel anchor block 2.
The utility model discloses connect the prefabricated zigzag 8 that is with web 101, bottom plate 102 and decking 103 of case roof beam main part 1, be in order to place steel anchor block connected system, also enlarged concrete placement's area simultaneously, greatly improved engineering quality. Meanwhile, the prestressed pull rod 5 and the steel anchoring block connecting system also ensure the engineering stability during later concrete curing. Thereby ensuring safer engineering and more reliable seam.
The utility model discloses a steel anchor piece connection system, prestressing force pull rod 5, the pre-buried overhanging reinforcing bar 3 of overlap joint to pour the multiple connected mode built-up connection of the wet seam of ultra high performance concrete, make 1 seam of case roof beam main part very firm reliable. Compared with single connection modes such as 3 lap joints of embedded overhanging reinforcing steel bars and 5 prestressed pull rods, the multi-combination connection mode is firmer and more durable, and the ultra-high performance concrete is poured to ensure that the joint has better stress performance and stability.
As a further improvement, (see fig. 2) the box girder main body 1 of the present invention is a hollow box body prefabricated by a web 101, a bottom plate 102 and a bridge deck 103.
Further, the concrete grouting material is an ultrahigh-performance concrete grouting material.
Further, the web 101, the bottom plate 102 and the bridge deck 103 on the box girder main body 1 are all prefabricated by ultra-high performance concrete. The compressive strength, tensile strength and toughness of Ultra High Performance Concrete (UHPC), thereby make the utility model discloses there is excellent atress Performance. Simultaneously, the durability of ultra high performance concrete can reach more than 100 years, makes again the utility model discloses a durability such as wearability, impermeability, freezing resistance is higher than ordinary precast concrete roof beam far away.
As a further improvement, the joint of the zigzag joints 8 of the web 101, the bottom plate 102 and the bridge deck 103 on the box girder main body 1 is provided with a grouting opening 9 (see fig. 3).
The utility model discloses an installation implementation process, at first, during the prefabricated component of mill, with the joint department of web 101, bottom plate 102 and decking 103 prefabricate into zigzag and connect 8 in case roof beam main part 1, 803 pre-buried certain quantity's steel anchor piece 2 on zigzag connects, is provided with the pretension bolt on the steel anchor piece 2 and connects hole 7 or connect the groove, and zigzag connects 8 first butt joint face 801 to zigzag and connects 804 and reserves certain quantity's prestressing force pull rod through-hole 4 at the back. And embedding a certain amount of embedded overhanging steel bars 3 in the second butt joint surface 802 of the Z-shaped joint 8. Pouring holes are reserved at the butt joint positions of the web plate 101, the bottom plate 102 and the Z-shaped joint 8 of the bridge deck 103 of the box girder main body 1. The construction method comprises the steps of firstly butting two box girder main bodies 1 during construction, aligning the web plate 101 and the bottom plate 102 of the box girder main body 1 and the steel anchoring block 2 on the upper surface 803 of the Z-shaped joint on the bridge deck 103 in a first step, ensuring that the pre-tightening bolt connecting holes 7 or the connecting grooves are aligned, putting the pre-tightening bolts 6 into the pre-tightening bolt connecting holes for fixing, and tightening the pre-tightening bolts 6 to primarily fix the box girder main body 1; secondly, aligning a first butt joint face 801 of a Z-shaped joint 8 on a web plate 101, a bottom plate 102 and a bridge deck 103 of the box girder main body 1 to a pre-embedded prestressed pull rod through hole 4 on the rear face 804 of the Z-shaped joint, and inserting a prestressed pull rod 5 from the rear face 804 of the Z-shaped joint; thirdly, overlapping the embedded overhanging steel bars 3 of the two prefabricated box girder main bodies 1 to strengthen the connection strength between the box girder main bodies 1; finally, blocking the outer side of a pouring area 10 region at the joint of the web plate 101 and the bottom plate 102 of the box girder main body 1 and the Z-shaped joint 8 of the bridge deck 103 by using a template, pouring ultrahigh-performance concrete from a pouring hole and curing; and finishing the construction of the connecting joint.
To sum up, the utility model discloses a dry joint seam combines together with wet seam, need not use mechanical structure such as steel sheet and chemical bolt, and adaptable more complicated environment has effectively avoided the destruction of constructing because of external factors such as temperature humidity to the knot, has improved contact durability.
The above embodiment is the preferred embodiment of the present invention, which is only used to facilitate the explanation of the present invention, it is not right to the present invention, which makes the restriction on any form, and any person who knows commonly in the technical field can use the present invention to make the equivalent embodiment of local change or modification without departing from the technical features of the present invention.
Claims (6)
1. The utility model provides an assembled strides ultra-high performance concrete box girder composite node greatly which characterized in that: the box girder comprises a box girder main body and a prestressed pull rod; the butt joint of the box girder main body is provided with a Z-shaped joint, an external extending steel bar is embedded in a second butt joint surface of the Z-shaped joint, a prestressed pull rod through hole is embedded from a first butt joint surface of the Z-shaped joint to the back surface of the Z-shaped joint, the box girder main body is connected through the embedded external extending steel bar, the prestressed pull rod through hole and a corresponding prestressed pull rod, and concrete grouting material is filled in the joint.
2. The fabricated long-span ultra-high performance concrete box girder composite node of claim 1, wherein: the box girder comprises a box girder body and is characterized by further comprising a steel anchoring block connecting system which comprises an L-shaped steel anchoring block and a pre-tightening bolt, wherein the steel anchoring block is arranged on the Z-shaped joint of the box girder body, and the pre-tightening bolt is arranged on the steel anchoring block.
3. The fabricated long-span ultra-high performance concrete box girder composite node of claim 1, wherein: the box girder main body is a hollow box body prefabricated by a bottom plate, a web plate and a bridge deck plate.
4. The fabricated long-span ultra-high performance concrete box girder composite node of claim 1, wherein: the concrete grouting material is an ultrahigh-performance concrete grouting material.
5. The fabricated long-span ultra-high performance concrete box girder composite node of claim 1, wherein: the web plate, the bottom plate and the bridge deck plate on the box girder main body are all prefabricated by ultra-high performance concrete.
6. The fabricated long-span ultra-high performance concrete box girder composite node of claim 1, wherein: grouting openings are reserved at the butt joint positions of the Z-shaped joints of the web plate, the bottom plate and the bridge deck on the box girder main body.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920411356.2U CN209941467U (en) | 2019-03-29 | 2019-03-29 | Assembled stride ultra high performance concrete box girder combination formula node greatly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920411356.2U CN209941467U (en) | 2019-03-29 | 2019-03-29 | Assembled stride ultra high performance concrete box girder combination formula node greatly |
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| CN209941467U true CN209941467U (en) | 2020-01-14 |
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| CN201920411356.2U Withdrawn - After Issue CN209941467U (en) | 2019-03-29 | 2019-03-29 | Assembled stride ultra high performance concrete box girder combination formula node greatly |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109914216A (en) * | 2019-03-29 | 2019-06-21 | 湖南大学 | A kind of assembled box beam combined type node across ultra-high performance concrete greatly and attaching method thereof |
| CN114382001A (en) * | 2022-01-25 | 2022-04-22 | 中国建设基础设施有限公司 | Novel connecting mode box girder bridge structure and combined bridge construction method |
-
2019
- 2019-03-29 CN CN201920411356.2U patent/CN209941467U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109914216A (en) * | 2019-03-29 | 2019-06-21 | 湖南大学 | A kind of assembled box beam combined type node across ultra-high performance concrete greatly and attaching method thereof |
| CN109914216B (en) * | 2019-03-29 | 2024-04-16 | 湖南大学 | Assembled large-span ultra-high-performance concrete box girder combined node and connecting method thereof |
| CN114382001A (en) * | 2022-01-25 | 2022-04-22 | 中国建设基础设施有限公司 | Novel connecting mode box girder bridge structure and combined bridge construction method |
| CN114382001B (en) * | 2022-01-25 | 2024-07-12 | 中国建设基础设施有限公司 | Box girder bridge structure and combined bridge construction method |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20200114 Effective date of abandoning: 20240416 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20200114 Effective date of abandoning: 20240416 |
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