CN214831925U - ECC material-based bridge wet joint structure with template - Google Patents
ECC material-based bridge wet joint structure with template Download PDFInfo
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- CN214831925U CN214831925U CN202022646832.4U CN202022646832U CN214831925U CN 214831925 U CN214831925 U CN 214831925U CN 202022646832 U CN202022646832 U CN 202022646832U CN 214831925 U CN214831925 U CN 214831925U
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- 239000000463 material Substances 0.000 title claims abstract description 47
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 129
- 239000010959 steel Substances 0.000 claims abstract description 129
- 238000010276 construction Methods 0.000 claims abstract description 34
- 238000003466 welding Methods 0.000 claims abstract description 10
- 230000003014 reinforcing effect Effects 0.000 claims description 14
- 238000009415 formwork Methods 0.000 claims description 12
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 9
- 230000002787 reinforcement Effects 0.000 abstract description 13
- 238000013461 design Methods 0.000 abstract description 4
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- 239000004568 cement Substances 0.000 description 5
- 238000005457 optimization Methods 0.000 description 5
- 239000011178 precast concrete Substances 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 239000002131 composite material Substances 0.000 description 3
- 239000010881 fly ash Substances 0.000 description 3
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- 230000015572 biosynthetic process Effects 0.000 description 1
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- 229910052799 carbon Inorganic materials 0.000 description 1
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- 238000003912 environmental pollution Methods 0.000 description 1
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- 238000010008 shearing Methods 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model discloses a wet seam structure of bridge from taking template based on ECC material, primary structure include both sides precast beam bridge deck section, wet seam section and inlay and mend the steel end template. The bridge deck of the precast section beam is made of ECC materials. And the embedded steel bottom template is arranged at the embedded position on the extending section of the bottom template of the bridge deck slab at the prefabricated section and is spliced and welded. This wet seam design is from taking the template, has the reinforcement of steel bar and connects, and tensile and compressive strength are high, and the durability is good, can effectively guarantee the performance continuity of wet seam interface department ECC material, is showing the efficiency and the security that have improved on-the-spot actual construction simultaneously, can solve the inconvenient and low problem of quality of current wet seam connection. During construction, the embedded steel plates are directly arranged at the embedded positions for splicing and welding, so that the convenience of wet joint construction is greatly improved, the construction efficiency is improved, the operation of constructors is facilitated, high-altitude suspension construction is avoided, and the construction safety is greatly improved.
Description
Technical Field
The utility model relates to a bridge structures technical field specifically is a wet seam structure of bridge from taking template based on ECC material.
Background
Wet joints are frequently damaged and difficult to repair in bridge construction. When the wet joint is damaged, obvious vehicle impact effect can be generated, driving conditions are reduced, and the service life of the bridge is also influenced. And for the earthquake-prone area, when the earthquake comes, the damage of the beam bridge is mainly caused by the damage of falling beams and the like due to poor integrity, and the pouring of the wet joint is particularly important.
The existing construction pouring of wet joints, namely the installation and the disassembly of templates are carried out by using steel wires and screws, leads workers to carry out overhead operation frequently and has high danger. And the installation and the dismantlement of template have a lot of inconveniences, have lengthened the engineering time, have drawn construction efficiency down. The existing wet joint structure design can enable workers to avoid high-altitude operation, but has the defects that the cost is high, a template is inconvenient to install, the construction difficulty is high, the construction time is prolonged, the construction efficiency is reduced, and therefore the existing wet joint structure design is not widely pushed.
The ultra-high-toughness cement-based composite material (abbreviated as ECC in English name) shows excellent deformability under the action of static tensile load, the ultimate tensile strain can stably reach more than 3%, and the ECC has good energy consumption capability under the action of impact in the aspect of dynamic mechanical property; in the drop hammer test, compared with reinforced concrete and steel fiber concrete, the hybrid fiber ECC has less impact damage and more energy consumption; the reasonable use of the fiber mixing amount, the fly ash mixing amount and the water-cement ratio can enhance the bending toughness of the ultra-high toughness cement-based composite material. Meanwhile, the ECC also has excellent water resistance, ion permeability resistance, freeze-thaw resistance and the like, and has excellent application performance in steel bridge deck pavement.
The existing research of applying ECC to wet joints mainly introduces a plurality of matters of applying ECC to wet joint experiments, and mainly comprises the problems of construction technology, process, durability and appearance quality. The ultra-high toughness cement-based composite material fully utilizes fly ash which is a byproduct of a power plant to replace cement which is a heavy energy consumption product, and adopts a large amount of ECC material mixed with fly ash in a mixing ratio to carry out wet joint construction, so that the environmental pollution can be reduced, the low-carbon and environment-friendly construction can be realized, and the problem of crack formation and cracking of common concrete can be solved due to the ultra-high toughness of the ECC, and the impermeability and durability of a bridge are improved.
The existing structural design applying ECC to wet joints is mainly a segmented bridge deck wet joint connection form. The wet joint structure includes a plurality of precast concrete deck panels erected on the stringers. And step-shaped wet joints along the bridge direction are formed between two adjacent precast concrete bridge deck plates at intervals. The nearly wet seam side of precast concrete decking is provided with upper embedded steel bar and the embedded steel bar of lower floor that extends to the precast concrete decking outside. And pouring super-strong toughness fiber concrete in the wet joint in a cast-in-place mode. Two adjacent precast concrete bridge deck boards are connected into a whole through adjacent wet joint concrete. The wet joint structure is mainly used for improving the capacity of the wet joint for transferring shearing force and bending moment and preventing the generation and the propagation of cracks at the wet joint. However, it still cannot solve the problems of difficult construction, high construction risk, and the like.
SUMMERY OF THE UTILITY MODEL
This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and in the abstract of the specification and the title of the application to avoid obscuring the purpose of this section, the abstract of the specification and the title of the application, and such simplifications or omissions are not intended to limit the scope of the invention.
The present invention has been made in view of the above and/or other problems that exist in existing bridge structures.
Therefore, the utility model aims at providing a wet seam structure of bridge from taking template based on ECC material, from taking the template, tensile, pressure intensity are high, and the durability is good, can effectively guarantee wet seam interface department ECC concrete material's performance continuity to have advantages such as construction convenience, easy maintenance, can solve the difficult problem of the wet seam connection quality of ECC material.
For solving the technical problem, according to the utility model discloses an aspect, the utility model provides a following technical scheme:
a self-templated bridge wet joint structure based on ECC material, comprising: the structure comprises a prefabricated section, a wet joint section, a steel bottom template and a field-shaped wet joint reinforcing mesh;
the prefabricated section bridge deck is made of ECC materials;
an embedded and repaired steel bottom template is arranged at the embedded and repaired position of the bottom template of the prefabricated section bridge deck slab, and the embedded and repaired continuous steel bottom template is used as a bottom template of the wet joint section;
the wet joint section is supported on the steel bottom formwork and is connected with the steel bottom formwork and the prefabricated section in a pouring mode, the wet joint section is continuously laid, the thickness of the wet joint section is equal to that of the bridge deck, and an ECC material which is the same as that of the bridge deck is adopted;
the reinforcing mesh for the Chinese character 'tian' shaped wet joint is an integrated Chinese character 'tian' shaped structure formed by welding upper and lower longitudinal reinforcing steel bars of the annular wet joint, upper and lower longitudinal reinforcing steel bars of the prefabricated plate and transverse reinforcing steel bars of the wet joint.
As an ECC material based wet seam structure of bridge of template from an optimization scheme, wherein: the prefabricated section comprises a beam bridge deck prefabricated slab, prefabricated slab upper-layer longitudinal steel bars and prefabricated slab lower-layer longitudinal steel bars, the prefabricated slab is made of an ECC material, the prefabricated slab is longitudinally arranged on the upper layer and the lower layer of the prefabricated slab, the embedded steel bottom template is arranged at the embedded position of an extending part embedded in the beam bridge deck prefabricated slab and welded into a bottom steel plate, the wet joint section comprises wet joint upper-layer longitudinal steel bars, wet joint lower-layer longitudinal steel bars, wet joint upper-layer transverse steel bars, wet joint lower-layer transverse steel bars and a wet joint cast-in-place section, the wet joint upper-layer longitudinal steel bars and the wet joint lower-layer longitudinal steel bars are made into a ring shape and are lapped and bound with the prefabricated slab upper-layer longitudinal steel bars and the prefabricated slab lower-layer longitudinal steel bars into a whole, and the wet joint upper-layer transverse steel bars penetrate through the prefabricated ring and welded upper parts of the wet joint upper-layer longitudinal steel bars and the wet joint lower-layer longitudinal steel bars (8), the wet joint lower layer transverse steel bar penetrates through the prefabricated annular wet joint upper layer longitudinal steel bar and the prefabricated annular wet joint lower layer longitudinal steel bar and is welded into a whole, the wet joint cast-in-place section is poured in the wet joint section by ECC materials same as those of the bridge deck, and the thickness of the wet joint cast-in-place section is equal to that of the prefabricated section bridge deck.
As an ECC material based wet seam structure of bridge of template from an optimization scheme, wherein: the bottom steel plate is formed by butt welding two embedded steel plates with the thickness of 6-12 mm and a steel plate with the prefabricated section extending to the wet joint section at the embedding position to form a continuous and complete construction template.
As an ECC material based wet seam structure of bridge of template from an optimization scheme, wherein: the longitudinal steel bars at the upper layer of the wet joint and the longitudinal steel bars at the lower layer of the wet joint are made into an annular structure, and the longitudinal steel bars at the upper layer of the wet joint and the longitudinal steel bars at the lower layer of the wet joint are welded with the longitudinal steel bars at the upper layer of the precast slab and the longitudinal steel bars at the lower layer of the precast slab into a whole at the annular structure to form two layers of grid-shaped reinforcing meshes in a Chinese character 'tian' shape.
As an ECC material based wet seam structure of bridge of template from an optimization scheme, wherein: the total width of the wet joint cast-in-place section is 1000 mm.
As an ECC material based wet seam structure of bridge of template from an optimization scheme, wherein: the steel embedding plate is made into a stepped embedding structure, the prefabricated section extending steel plate is made into an embedding shape at a corresponding position, and the prefabricated section extending steel plate and the steel embedding plate are butted, spliced and welded at the embedding position during construction.
Compared with the prior art: compared with common concrete materials, the ECC material with better deformation performance, energy consumption performance, toughness, resistance, compression resistance, freeze-thaw resistance and the like is adopted as the pouring material, so that the durability of the whole wet joint structure is greatly improved.
1. The high-altitude operation is directly avoided, the construction safety is guaranteed, and the construction cost is reduced.
2. The complex installation and the disassembly of the template are avoided, and the construction efficiency is accelerated.
3. The wet joint structure is more reliable, the performances of force transmission, compression resistance, tensile resistance and the like are improved, and the durability is better.
The bridge wet joint structure with the template based on the ECC material has the advantages of high tensile strength and pressure intensity, good durability, capability of effectively ensuring the performance continuity of the ECC concrete material at the wet joint interface, convenience in construction, easiness in maintenance and the like, and can solve the problem of the connection quality of the wet joint of the ECC material.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the present invention will be described in detail with reference to the accompanying drawings and detailed embodiments, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor. Wherein:
FIG. 1 is an elevation view of a self-contained form beam decking wet seam continuous construction based on ECC material of the present invention;
fig. 2 is a plan view of the arrangement of the upper reinforcing mesh of the wet joint continuous structure of the self-carrying form beam bridge deck based on ECC material of the present invention;
FIG. 3 is a plan view of the lower layer web net of the wet joint continuous structure of the self-carrying form beam bridge deck based on ECC material of the present invention;
FIG. 4 is a vertical view of the ring structure of the wet joint upper and lower longitudinal steel bars of the wet joint continuous structure of the ECC-based self-contained template beam bridge deck slab of the present invention;
fig. 5 is a top view of the ring structure of the wet seam upper and lower longitudinal steel bars of the wet seam continuous structure of the self-carrying form beam bridge deck slab based on the ECC material.
In the drawings
1. Prefabricated panel
2. Longitudinal steel bars on the upper layer of the precast slab;
3. longitudinal steel bars on the lower layer of the prefabricated slab;
4. a bottom steel plate;
5. wet seam upper longitudinal reinforcement;
6. wet joint lower layer transverse steel bar;
7. wet seam upper layer transverse steel bars;
8. wet seam lower layer longitudinal reinforcement;
9. and (5) casting a wet joint in situ.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be implemented in other ways than those specifically described herein, and one skilled in the art may similarly generalize the present invention without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Next, the present invention will be described in detail with reference to the schematic drawings, and in the detailed description of the embodiments of the present invention, for convenience of explanation, the sectional view showing the device structure will not be partially enlarged according to the general scale, and the schematic drawings are only examples, and should not limit the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.
In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
The utility model provides a wet seam structure of bridge from taking template based on ECC material is from taking the template, and tensile, pressure intensity are high, and the durability is good, can effectively guarantee wet seam interface ECC concrete material's performance continuity to have advantages such as construction convenience, easy maintenance, can solve the difficult problem of the wet seam connection quality of ECC material, please refer to figure 1, figure 2, figure 3, figure 4 and figure 5, include: the prefabricated section, the wet joint section, the steel bottom template and the field-shaped wet joint reinforcing mesh;
referring again to fig. 1 and 2, the construction shown includes prefabricated sections, wet seamed sections, steel bottom forms and field-shaped wet seamed reinforcing mesh;
the prefabricated section bridge deck is made of ECC materials;
an embedded and repaired steel bottom template is arranged at the embedded and repaired position of the bottom template of the prefabricated section bridge deck slab, and the embedded and repaired continuous steel bottom template is used as a bottom template of the wet joint section;
the wet joint section is supported on the steel bottom formwork and is connected with the steel bottom formwork and the prefabricated section in a pouring mode, the wet joint section is continuously laid, the thickness of the wet joint section is equal to that of the bridge deck, and an ECC material which is the same as that of the bridge deck is adopted;
the reinforcing mesh for the Chinese character 'tian' shaped wet joint is an integrated Chinese character 'tian' shaped structure formed by welding upper and lower longitudinal reinforcing steel bars of the annular wet joint, upper and lower longitudinal reinforcing steel bars of the prefabricated plate and transverse reinforcing steel bars of the wet joint.
Referring to fig. 1, 2, 3, 4 and 5 again, the precast segment includes a precast slab 1 of a beam bridge deck, and an upper longitudinal reinforcement 2 and a lower longitudinal reinforcement 3 of the precast slab, which are longitudinally disposed on an upper layer and a lower layer of the precast slab, the precast slab 1 is made of an ECC material same as that of a deck slab, the steel bottom form for embedment is welded to a bottom steel plate 4 at an embedment position of an extension portion pre-embedded in the precast slab 1 of the beam bridge deck, the wet joint segment includes an upper longitudinal reinforcement 5 of a wet joint, a lower longitudinal reinforcement 8 of the wet joint, an upper transverse reinforcement 7 of the wet joint, a lower transverse reinforcement 6 of the wet joint, and a cast-in-place segment 9 of the wet joint, the upper longitudinal reinforcement 5 of the wet joint and the lower longitudinal reinforcement 8 of the wet joint are made into a ring shape and are overlapped and bound with the upper longitudinal reinforcement 2 and the lower longitudinal reinforcement 3 of the precast slab, the wet joint upper layer transverse steel bar 7 penetrates through the upper parts of the prefabricated annular wet joint upper layer longitudinal steel bar 5 and the prefabricated wet joint lower layer longitudinal steel bar (8) and is welded into a whole, the wet joint lower layer transverse steel bar 6 penetrates through the lower parts of the prefabricated annular wet joint upper layer longitudinal steel bar 5 and the prefabricated wet joint lower layer longitudinal steel bar 8 and is welded into a whole, the wet joint cast-in-place section 9 is poured in the wet joint section by adopting an ECC material the same as that of the bridge deck slab, and the thickness of the wet joint cast-in-place section is equal to that of the prefabricated section bridge deck slab.
Referring to fig. 1, 2, 3, 4 and 5 again, the bottom steel plate 4 is formed by butt welding two embedded steel plates with a thickness of 6-12 mm and a steel plate with a prefabricated section extending to a wet joint section at the embedding position to form a continuous and complete construction formwork.
Referring to fig. 1, 2, 3, 4 and 5 again, the wet joint upper longitudinal steel bars 5 and the wet joint lower longitudinal steel bars 8 are made into a ring structure, and the wet joint upper longitudinal steel bars 5 and the wet joint lower longitudinal steel bars 8, the precast slab upper longitudinal steel bars 2 and the precast slab lower longitudinal steel bars 3 are welded together at the ring structure to form two layers of grid-shaped reinforcing meshes.
Referring again to fig. 1, 2, 3, 4 and 5, the total width of the wet seam cast-in-place section 9 is 1000 mm.
Referring to fig. 1, 2, 3, 4 and 5 again, the steel reinforcing plate is made into a stepped reinforcing structure, the prefabricated section extension steel plate is made into a reinforcing shape at a corresponding position, and the prefabricated section extension steel plate are butt-jointed and welded at the reinforcing position during construction.
During specific construction, firstly, the embedded steel plate is placed at the embedded position of the beam extension steel plate for welding operation to form a wet joint bottom structure, and then the upper and lower layers of longitudinal annular steel bar templates of the wet joint and the prefabricated beam are aligned and welded together to form a single-ring structure with three rows of wet joints. Then taking three steel bars as upper-layer transverse steel bars of the wet joint and welding the three steel bars together with the upper-layer longitudinal steel bars of the wet joint at the highest point of the single ring structure respectively to form an upper-layer 'field' -shaped steel bar mesh, and taking three steel bars as lower-layer transverse steel bars of the wet joint and welding the three steel bars together with the lower-layer longitudinal steel bars of the wet joint at the lowest point of the single ring structure respectively to form a lower-layer 'field' -shaped steel bar mesh. And finally, pouring an ECC material in the whole wet joint structure to finish construction.
While the invention has been described above with reference to an embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, as long as there is no structural conflict, the various features of the disclosed embodiments of the present invention can be used in any combination with each other, and the non-exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (6)
1. An ECC material-based self-templated bridge wet-seam structure, comprising: the structure comprises a prefabricated section, a wet joint section, a steel bottom template and a field-shaped wet joint reinforcing mesh;
the prefabricated section bridge deck is made of ECC materials;
an embedded and repaired steel bottom template is arranged at the embedded and repaired position of the bottom template of the prefabricated section bridge deck slab, and the embedded and repaired continuous steel bottom template is used as a bottom template of the wet joint section;
the wet joint section is supported on the steel bottom formwork and is connected with the steel bottom formwork and the prefabricated section in a pouring mode, the wet joint section is continuously laid, the thickness of the wet joint section is equal to that of the bridge deck, and an ECC material which is the same as that of the bridge deck is adopted;
the reinforcing mesh for the Chinese character 'tian' shaped wet joint is an integrated Chinese character 'tian' shaped structure formed by welding upper and lower longitudinal reinforcing steel bars of the annular wet joint, upper and lower longitudinal reinforcing steel bars of the prefabricated plate and transverse reinforcing steel bars of the wet joint.
2. The precast slab-based bridge wet joint structure based on the ECC material is characterized in that the precast segment comprises a bridge deck precast slab (1), precast slab upper-layer longitudinal steel bars (2) and precast slab lower-layer longitudinal steel bars (3) which are longitudinally arranged at the upper layer and the lower layer of the precast slab, the precast slab (1) adopts the same ECC material as a bridge deck, the embedded steel bottom formwork is welded to be a bottom steel plate (4) at the embedded position of an extending part embedded in the bridge deck precast slab (1), the wet joint segment comprises wet joint upper-layer longitudinal steel bars (5), wet joint lower-layer longitudinal steel bars (8), wet joint upper-layer transverse steel bars (7), wet joint lower-layer transverse steel bars (6) and wet joint cast-in-place segments (9), and the wet joint upper-layer longitudinal steel bars (5) and the wet joint lower-layer longitudinal steel bars (8) are made into a ring shape and are made of the precast slab upper-layer longitudinal steel bars (2) and the precast slab lower-layer longitudinal steel bars (9) The longitudinal steel bars (3) on the upper layer are overlapped and bound into a whole, the transverse steel bars (7) on the upper layer of the wet joint penetrate through the longitudinal steel bars (5) on the upper layer of the wet joint which are made into an annular shape in advance and the longitudinal steel bars (8) on the lower layer of the wet joint and are welded into a whole, the transverse steel bars (6) on the lower layer of the wet joint penetrate through the longitudinal steel bars (5) on the upper layer of the wet joint which are made into an annular shape in advance and the lower part of the longitudinal steel bars (8) on the lower layer of the wet joint and are welded into a whole, the cast-in-place section (9) of the wet joint is cast in the wet joint section by adopting an ECC material which is the same as that of the bridge deck slab, and the thickness of the bridge deck slab is equal to that of the prefabricated section.
3. The ECC-material-based bridge wet joint structure with formworks according to claim 2, wherein the bottom steel plate (4) is formed by butt welding two embedded steel plates with the thickness of 6-12 mm and steel plates of prefabricated sections extending to the wet joint sections at the embedded positions to form a continuous and complete construction formwork.
4. The ECC-based bridge wet joint structure with formworks is characterized in that the wet joint upper longitudinal steel bars (5) and the wet joint lower longitudinal steel bars (8) are made into a ring-shaped structure, and the wet joint upper longitudinal steel bars (5) and the wet joint lower longitudinal steel bars (8) are welded with the precast slab upper longitudinal steel bars (2) and the precast slab lower longitudinal steel bars (3) into a whole at the ring-shaped structure to form a two-layer grid-shaped steel bar mesh.
5. An ECC-material-based bridge wet joint construction with formwork according to claim 2, characterized in that the total width of the wet joint cast-in-place section (9) is 1000 mm.
6. The ECC-material-based bridge wet joint structure with self-made templates as claimed in claim 1, wherein the embedded steel templates are made into a step embedded structure, the prefabricated section extension steel plates are made into an embedded shape at corresponding positions, and the embedded steel plates and the prefabricated section extension steel plates are butt-jointed and welded at the embedded positions during construction.
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| CN202022646832.4U CN214831925U (en) | 2020-11-16 | 2020-11-16 | ECC material-based bridge wet joint structure with template |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114319065A (en) * | 2022-01-18 | 2022-04-12 | 湖南大学 | Main beam unit with UHPC (ultra high performance polycarbonate) formwork structure, main beam structure and construction method of main beam structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114319065A (en) * | 2022-01-18 | 2022-04-12 | 湖南大学 | Main beam unit with UHPC (ultra high performance polycarbonate) formwork structure, main beam structure and construction method of main beam structure |
| CN114319065B (en) * | 2022-01-18 | 2022-10-28 | 湖南大学 | Main beam unit with UHPC (ultra high performance polycarbonate) formwork structure, main beam structure and construction method of main beam structure |
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