CN216006602U - Template-free construction flange structure system for longitudinal wet joint of concrete box girder - Google Patents
Template-free construction flange structure system for longitudinal wet joint of concrete box girder Download PDFInfo
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- CN216006602U CN216006602U CN202120698965.8U CN202120698965U CN216006602U CN 216006602 U CN216006602 U CN 216006602U CN 202120698965 U CN202120698965 U CN 202120698965U CN 216006602 U CN216006602 U CN 216006602U
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- 238000010276 construction Methods 0.000 title claims abstract description 57
- 239000004567 concrete Substances 0.000 title claims abstract description 41
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 25
- 239000006260 foam Substances 0.000 claims abstract description 6
- 238000007789 sealing Methods 0.000 claims abstract description 6
- 238000003466 welding Methods 0.000 claims abstract description 6
- 238000009417 prefabrication Methods 0.000 claims abstract description 3
- 238000007373 indentation Methods 0.000 claims 1
- 230000002787 reinforcement Effects 0.000 claims 1
- 210000003781 tooth socket Anatomy 0.000 abstract description 15
- 238000000034 method Methods 0.000 abstract description 9
- 229910001294 Reinforcing steel Inorganic materials 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 5
- 230000002411 adverse Effects 0.000 abstract description 3
- 238000012876 topography Methods 0.000 abstract description 2
- 239000011178 precast concrete Substances 0.000 description 11
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 239000011374 ultra-high-performance concrete Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000003796 beauty Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model relates to a template-free construction flange structure system for longitudinal wet joints of concrete box girders. The flange structure system comprises a concrete flange main body, a flange first-stage step, a flange second-stage step, a tooth groove for placing a reinforcing steel bar in the step, a flange concrete bearing and a gap foam sealing strip. When the concrete beam is prefabricated, step prefabrication is carried out on the flange, rectangular, U-shaped or semicircular tooth grooves are reserved in the step and used for placing reinforcing steel bars, the first-stage tooth grooves and the second-stage tooth grooves are distributed in parallel at equal intervals in the step, and the first-stage tooth grooves are located below the second-stage tooth grooves. The flange structure system is directly placed with a reinforcing mesh in the tooth socket without welding, and the flange is transversely connected after concrete is poured. The utility model can simplify the construction procedure, improve the construction efficiency, reduce the workload of site construction, save manpower, material resources and financial resources, shorten the construction period and overcome the adverse influence of construction topography.
Description
Technical Field
The utility model belongs to the field of civil engineering, relates to a bridge structure technology, and particularly relates to a template-free construction flange structure system for longitudinal wet joints of concrete box girders.
Background
In recent years, social economy is rapidly developed, traffic demand is continuously increased, and the speed of bridge construction is continuously pursued, so that a method for quickly constructing bridges is provided for quickly realizing traffic service of small and medium-sized bridges such as urban viaducts, expressways and the like.
The rapid bridge construction is a bridge which takes full consideration of planning, design, construction method and other aspects under the principle of safety, durability, applicability, environmental protection, economy and beauty, and adopts some special transportation equipment to transport the components to the site for installation through the factory prefabrication of the components so as to accelerate the site construction speed of the bridge. By adopting the technology, the quality, the production efficiency and the construction efficiency of the bridge member are both obviously improved; the field operation amount and manpower are greatly reduced, the field construction organization is simplified, and the construction safety is improved; the problems of noise, dust pollution and the like of a construction site are obviously reduced. Compared with the construction period of hundreds of days or even 2-3 years in the traditional construction mode, the on-site construction time for quickly constructing the bridge is expected to be shortened to a plurality of weeks or even a plurality of days, and the method has wide application prospect.
In the current rapid construction bridge, the prefabricated small box girder is widely applied to urban bridges, highway bridges and overpasses all over the country in recent years due to simple structure and mature design and construction experience. The prefabricated small box girder can adopt a simply supported structure or a structure continuous structure after the simple support. The bridge deck can be prefabricated in a factory or a construction site, and the bridge deck is connected into a whole by pouring the cast-in-place section after the main beam is installed.
At present, in the construction of cast-in-place of a transverse connecting longitudinal joint of a box girder, a construction method of welding steel bars and then reversely hoisting a vertical mold is often adopted, and the consumption of manpower and time is large due to the large quantity of the welding steel bars in the longitudinal joint. Meanwhile, the pouring template needs to be placed under the bridge in advance for preparation, then reverse hoisting is carried out, and after pouring is finished, a bridge inspection vehicle needs to be used for descending under the bridge to carry out mold dismantling. The series of work consumes a large amount of manpower, material resources and financial resources, has great influence on the construction period, and how to solve the problem of quick cast-in-place of the longitudinal joint becomes a focus which is urgently needed to be solved in the current quick construction of the bridge. In response to these problems, there is also currently a related search for improving the wet joint casting speed. For example, chinese patent CN 208685438U discloses "a block-type wet-seam-joint type of bridge deck", which includes a plurality of precast concrete bridge decks erected on stringers. And step-shaped wet joints along the bridge direction are formed between two adjacent precast concrete bridge decks at intervals, upper-layer embedded steel bars and lower-layer embedded steel bars which extend to the outer sides of the precast concrete bridge decks are arranged on the sides of the wet joints of the precast concrete bridge decks, and finally, the ultra-strong toughness fiber concrete ECC is cast in the wet joints in a cast-in-place mode. The utility model discloses a though can reduce cast-in-place process in the scene to a certain extent, still can not improve the construction speed by a wide margin, and still need the template to pour, the actual engineering benefit is not big. Also, for example, chinese patent CN 111472250 a discloses a "no-welding small box girder wet joint structure and method using ultra-high performance concrete", a wet joint along the bridge direction is formed between two adjacent prefabricated small box girders, a bridge deck flat-straight section is provided at the top of the prefabricated small box girders, a plurality of annular reinforcing bars are pre-embedded in the bridge deck flat-straight section, each annular reinforcing bar is arranged along the transverse bridge direction, and the annular end of the annular reinforcing bar extends into the wet joint; a plurality of constructional steel bars are arranged in the wet joint, and each constructional steel bar is arranged along the bridge direction; the prefabricated small box girder is connected into a whole through the ultra-high performance concrete with wet joints and the annular reinforcing steel bars wrapped in the ultra-high performance concrete. Although the construction process can be simplified and the construction efficiency can be improved, the construction method still needs to build a template for pouring, and the applicability needs to be improved.
In summary, when the construction of an urban viaduct or the construction of a template under the bridge is not beneficial to reverse hanging, how to seek a novel construction method to reduce the interference to the space under the bridge or the influence of the adverse terrain under the bridge becomes a breakthrough point in the current construction of small and medium-sized bridges.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a template-free construction flange structure system for longitudinal wet joints of small concrete box girders, which aims to solve the problems in the prior art. The utility model can simplify the construction procedure, improve the construction efficiency, reduce the workload of site construction, save manpower, material resources and financial resources, shorten the construction period and overcome the adverse influence of construction topography.
The technical scheme adopted by the utility model is as follows: the utility model provides a template construction edge of a wing structure system is exempted from in vertical wet seam of concrete little box girder, includes a plurality of precast concrete little box girders, and a plurality of precast concrete little box girders all arrange along following the bridge direction, and the precast concrete little box girder edge of a wing is located the cast-in-place longitudinal joint side of precast concrete little box girder, and the precast concrete little box girder edge of a wing is all parallel adjacent, and the clearance is no longer than 5cm between two edges.
The prefabricated little case beam flange of concrete sets up two-stage step tooth's socket in neighbouring wet seam side, step tooth's socket divides the step to prefabricate into one-level step tooth's socket and second grade step tooth's socket when prefabricated, and correspond in each grade and reserve out the rectangle, U-shaped or semi-circular tooth's socket, tooth's socket internal dimension all is greater than the diameter of wet seam connection structure system reinforcing bar, and guarantee concrete protection layer thickness, the equal parallel equidistance of each grade step tooth's socket distributes, two adjacent case beam flange step tooth's sockets are at the equal one-to-one of horizontal longitudinal direction.
The first-stage step tooth groove in the concrete prefabricated small box girder flange is located at the lower portion of the second-stage step tooth groove, the inner side of the first-stage step tooth groove is retracted into the second-stage step tooth groove and is not smaller than 30cm, a concrete bearing is arranged at the bottom of the first-stage step tooth groove, and the thickness of the concrete bearing is not smaller than 3 cm.
The clearance between the flanges of the adjacent small concrete prefabricated box girders is not more than 5cm, and the small concrete prefabricated box girders are filled with foam sealing strips in the clearance between the flanges after the girder erection is completed, so that slurry leakage is prevented.
The inside of one-level step tooth's socket places in proper order and welds the lower floor that makes up the shaping and connect the reinforcing bar net in advance, and the lower floor is connected the inside that the reinforcing bar net stretched into one-level step tooth's socket and is no less than 50 cm. The upper layer connecting reinforcing mesh which is welded in advance is sequentially arranged inside the tooth sockets of the second-stage step, and the upper layer connecting reinforcing mesh extends into the tooth sockets of the second-stage step by not less than 50 cm.
And post-pouring concrete is arranged on the concrete bearing, the post-pouring concrete fills the two-stage stepped tooth grooves, and the lower-layer connecting reinforcing mesh and the upper-layer connecting reinforcing mesh are wrapped to realize the transverse connection of the small precast concrete box girder.
The utility model has the beneficial effects that:
1) the flange end structure form of the traditional prefabricated small box girder is changed, through the structural design of the graded reserved grooves, the situation that concrete pouring is carried out on a reverse hanging template as in the traditional box girder longitudinal seam cast-in-place construction is not needed, the longitudinal seam pouring construction procedures of the combined box girder are obviously reduced, a large amount of manpower, material resources and financial resources are saved, and the difficulty that the template hoisting is not facilitated due to the terrain below the bridge is overcome.
2) The method changes the mode that the reinforcing steel bars at the wet joint of the traditional combined box girder are welded on site, and the reinforcing steel bar mesh at the longitudinal joint is manufactured in advance and is directly arranged in the flange step tooth socket. The construction period is obviously reduced while the transverse connectivity of the wet joint is ensured, the construction workload on site is reduced, the manpower, material resources and financial resources are saved, and the construction progress of the bridge is favorably improved.
Description of the drawings:
FIG. 1 is a schematic perspective view of a template-free longitudinal joint construction box girder flange according to the present invention;
FIG. 2 is a vertical view of a flange of a template-free longitudinal joint construction box girder according to the present invention;
FIG. 3 is a plan view of a flange of a template-free longitudinal joint construction box girder in the utility model;
FIG. 4 is a schematic view of the longitudinal seam lower layer connecting reinforcing mesh of the present invention;
FIG. 5 is a schematic view of the upper layer of the longitudinal seam of the present invention connecting with a reinforcing mesh;
FIG. 6 is a cross-sectional view of a wet joint cast structure according to the present invention;
in the drawing, 1 is a precast concrete box girder flange, 10 is a two-step tooth socket, 101 is a tooth socket on a first step, 102 is a tooth socket on a second step, 11 is a concrete support, 12 is post-cast concrete, 4 is a longitudinal seam lower layer connecting reinforcing mesh, 5 is a longitudinal seam upper layer connecting reinforcing mesh, and 3 is a box girder gap foam sealing strip.
The specific implementation mode is as follows:
the present invention is further illustrated by the following examples, but it should not be construed that the scope of the above-described subject matter is limited to the following examples. Various substitutions and alterations can be made without departing from the technical idea of the utility model and the scope of the utility model is covered by the present invention according to the common technical knowledge and the conventional means in the field.
Example 1:
the embodiment discloses a template-free construction flange structure system for a longitudinal wet joint of a concrete small box girder, which comprises a box girder flange main body (1), two-stage step tooth grooves (10), one-stage step tooth grooves (101), two-stage step tooth grooves (102), a concrete bearing (11), a box girder gap foam sealing strip (3), a longitudinal joint lower layer connecting reinforcing mesh (4) and a longitudinal joint upper layer connecting reinforcing mesh (5).
Referring to the attached drawings, when small box girders are prefabricated in a girder yard, the box girder flanges (1) are prefabricated in a grading manner according to a design drawing, grooves are reserved in steps, two-stage step tooth sockets (10) are prefabricated, the cross sections of the step inner tooth sockets can be rectangular, U-shaped or semicircular, the tooth sockets are distributed in parallel and equidistantly, the one-stage step tooth socket (101) is positioned at the lower part of the second-stage step tooth socket (102), and the directions and the sizes of the steps and the tooth sockets of the two adjacent box girder flanges are in one-to-one correspondence.
And then, transporting the prefabricated box girders to a construction site from a girder yard by using a girder transporting vehicle, correspondingly erecting the prefabricated box girders to corresponding positions according to design marks by using a bridge erecting machine or a heavy crane, wherein the tooth socket opening directions of two adjacent box girder flanges are ensured to be in one-to-one correspondence without deviation during erection, and the gap between the box girder flanges is controlled within 5 cm.
After the box girders are erected, the foam sealing strips (3) are attached to the gaps between the two box girders, so that slurry leakage is prevented when concrete is poured.
And then correspondingly placing the longitudinal seam lower layer connecting reinforcing mesh (4) which is welded and formed in advance on a first-stage step tooth space (101) concrete support (11), then correspondingly placing the longitudinal seam upper layer connecting reinforcing mesh (5) which is welded and formed in advance in a second-stage step tooth space (102), and then pouring concrete (12) after setting on the concrete support to realize the structural continuity of the box girder in the transverse bridge direction.
Claims (5)
1. The utility model provides a vertical wet joint of concrete box girder exempts from template construction flange structure system, its characterized in that concrete prefabrication box girder flange (1) is close to wet joint side and sets up two-stage step tooth's socket (10), two-stage step tooth's socket (10) include one-level step tooth's socket (101) and second grade step tooth's socket (102), one-level step tooth's socket (101) and second grade step tooth's socket (102) are parallel equidistant distribution respectively, the inside cross-section of its tooth's socket is rectangle, U-shaped or semicircular shape, inside size is more than or equal to the diameter of connecting reinforcement, one-level step tooth's socket (101) are located the lower part of second grade step tooth's socket (102), its inboard that indents second grade step tooth's socket (102) of indentation is not less than 30cm, the bottom of one-level step tooth's socket (101) sets up concrete bearing (11), the thickness of concrete bearing (11) is not less than 3 cm.
2. The formwork-free construction flange structure system for the longitudinal wet joints of the concrete box girders, according to claim 1, is characterized in that the clear space gap between the flanges (1) of the adjacent prefabricated box girders is not more than 5cm, and the clear space gap is filled with a foam sealing strip (3).
3. The formwork-free construction flange structure system of the longitudinal wet joint of the concrete box girder according to claim 1, wherein the lower connecting reinforcing mesh (4) formed by welding in advance is sequentially placed inside the primary step gullet (101), and the lower connecting reinforcing mesh (4) extends into the primary step gullet (101) by not less than 50 cm.
4. The formwork-free construction flange structure system of the longitudinal wet joint of the concrete box girder according to claim 1, wherein the upper connecting reinforcing mesh (5) formed by welding in advance is sequentially placed inside the secondary step gullet (102), and the upper connecting reinforcing mesh (5) extends into the secondary step gullet (102) by not less than 50 cm.
5. The formwork-free construction flange structure system for the longitudinal wet joints of the concrete box girders as claimed in claim 1, wherein a post-cast concrete (12) is arranged on the concrete support (11), the post-cast concrete (12) fills the two-stage stepped tooth grooves (10), and wraps the lower connecting reinforcing mesh (4) and the upper connecting reinforcing mesh (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120698965.8U CN216006602U (en) | 2021-03-29 | 2021-03-29 | Template-free construction flange structure system for longitudinal wet joint of concrete box girder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120698965.8U CN216006602U (en) | 2021-03-29 | 2021-03-29 | Template-free construction flange structure system for longitudinal wet joint of concrete box girder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216006602U true CN216006602U (en) | 2022-03-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120698965.8U Expired - Fee Related CN216006602U (en) | 2021-03-29 | 2021-03-29 | Template-free construction flange structure system for longitudinal wet joint of concrete box girder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216006602U (en) |
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2021
- 2021-03-29 CN CN202120698965.8U patent/CN216006602U/en not_active Expired - Fee Related
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220311 |
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| CF01 | Termination of patent right due to non-payment of annual fee |