CN114150568A - Light-duty combination beam longitudinal joint additional strengthening of assembled - Google Patents
Light-duty combination beam longitudinal joint additional strengthening of assembled Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 153
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- 230000003014 reinforcing effect Effects 0.000 claims abstract description 57
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- E—FIXED CONSTRUCTIONS
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- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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Abstract
The invention discloses an assembled light-weight composite beam longitudinal joint reinforcing structure, the composite beam comprises a prefabricated UHPC bridge deck arranged at the upper part and a steel structure beam arranged at the lower part, the longitudinal joint reinforcing structure is positioned between the two composite beams, and the longitudinal joint reinforcing structure comprises: bottom steel plates, studs, steel plate strips, reinforcing meshes and cast-in-situ UHPC wet joints; the bottom steel plate is formed by splicing two steel plates extending out of the bottom end parts of two prefabricated UHPC bridge deck plates respectively, a bottom steel plate splicing seam is formed at the splicing part of the two steel plates, and the studs and the steel plate strips are arranged on the bottom steel plate; the steel bar net is composed of transverse steel bars and additionally laid longitudinal steel bars, the transverse steel bars and the additionally laid longitudinal steel bars respectively extend out of the ends of the two prefabricated UHPC bridge decks, a cast-in-situ UHPC wet joint is poured between the bottom steel plate and the two prefabricated UHPC bridge decks, and the studs, the steel plate strips and the steel bar net are buried and covered. By adopting the longitudinal joint reinforcing structure of the assembled light composite beam, the possibility of cracking of a longitudinal joint is basically eliminated, the stress performance of the longitudinal joint is improved, and the durability of a bridge deck system is enhanced.
Description
Technical Field
The invention relates to the technical field of bridge structures, in particular to a longitudinal joint reinforcing structure of an assembled light composite beam.
Background
With the development of economy in China, the infrastructure has achieved remarkable achievement, wherein bridge construction is particularly prominent, and according to statistics, the number of newly built bridges in China accounts for more than half of the number of newly built bridges in China every year. The assembled light composite beam structure has the advantages of light dead weight, moderate span, no prestress, good durability, low total life cost and the like, and is widely adopted by municipal bridges and most of small and medium-sized bridges. However, a large number of constructed bridges show that the joints of the prefabricated bridges are the weakest parts of the whole bridge, and the quality of the joints directly determines the service performance and durability of the prefabricated bridges. The main disease forms at the joint are cracking and water leakage. Most of joints of the prefabricated and assembled bridge work with cracks, once water leakage occurs, internal steel bars are corroded and generate rusty expansion, and therefore tensile stress is generated on concrete wrapping the steel bars, and larger concrete cracking is caused. In addition, when the prefabricated bridge joint department reinforcing bar is more, welding work load is huge, consumes manpower and materials in a large number and reduces construction speed, and welding quality also can't guarantee. In order to solve the problems, the invention provides a longitudinal joint reinforcing structure of an assembled light combined beam.
The ultra-high performance concrete (UHPC) is also called active powder concrete, is a cement-based composite material which is prepared by fine aggregates such as cement, quartz sand, quartz powder, silica fume, fly ash, steel fiber, high-efficiency water reducing agent and the like according to the maximum compact theory, and has the characteristics of high strength, high toughness, low porosity, high durability and no shrinkage in the later period. Ultra High Performance Concrete (UHPC) is a new type of concrete with ultra high strength, ultra high toughness, and high durability. UHPC is a general name of cement-based composite materials which have the compression strength of more than 150MPa, ultra-high toughness and ultra-long durability internationally. The UHPC material component does not contain coarse aggregate and the particle size is generally less than 1 mm. The steel fiber dispersed in the UHPC can greatly slow down the expansion of micro cracks in the material, so that the material has ultrahigh toughness and ductility. The UHPC has a compact microstructure, is almost impermeable, has strong permeation resistance, carbonization resistance, corrosion resistance and freeze-thaw cycle resistance, and researches show that the durability of the UHPC material can reach more than 200 years, and the service life of a concrete structure can be greatly prolonged. The superiority of UHPC has been widely accepted in the engineering field, and is applied in the fields of bridges and the like, and a very considerable effect is obtained.
For common concrete, more joint structures are direct joints and plain joints, and the joints are easy to suffer from water seepage, rutting and low bearing capacity. Because the UHPC material has tensile property, the bearing capacity can be improved by changing the structural form of the seam and the arrangement form of the reinforcing steel bars. For UHPC local damage repair and joint positions, the problem of discontinuous steel fibers at the contact interface of new and old concrete exists, if a weak UHPC joint is not strengthened, the tensile strength of the joint section before cracking is low, the application requirement is difficult to adapt, and the UHPC layer cracks in advance at the joint, so that the stress performance and the durability of a bridge structure are influenced. Therefore, the performance of the cast-in-place joint needs to be researched, and guarantee is provided for smooth erection and safe operation of the assembled bridge.
Therefore, the invention aims to solve the problems of cracking, water leakage and poor durability of the longitudinal joint between the pi-shaped beam units of the existing fabricated light combined beam structure, and provides the ultra-high performance concrete (UHPC) cast-in-place longitudinal wet joint structure which can prevent cracking and water leakage, improve the service performance and durability of the joint, and has simple structure, convenient construction and strong applicability.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects and shortcomings of longitudinal joints between pi-shaped beam units of the existing assembled light composite beam structure in the background art, and provide an ultra-high performance concrete (UHPC) cast-in-place longitudinal wet joint structure which can prevent cracking and water leakage, improve the service performance and durability of the joints, and has simple structure, convenient construction and strong applicability. And then effectively reduce the seam fracture disease, improve the atress performance and the durability of bridge structures, and reduce the construction degree of difficulty and construction volume. In order to solve the above problems, the technical solution provided by the present invention is as follows:
the invention relates to an assembled light-weight composite beam longitudinal joint reinforcing structure, which comprises a prefabricated UHPC bridge deck arranged at the upper part and a steel structure beam arranged at the lower part, wherein the longitudinal joint reinforcing structure is positioned between the two composite beams, and comprises: bottom steel plates, studs, steel plate strips, reinforcing meshes and cast-in-situ UHPC wet joints; the bottom steel plate is formed by splicing two steel plates extending out of the bottom end parts of the two prefabricated UHPC bridge deck plates respectively, a bottom steel plate splicing seam is formed at the splicing part of the two steel plates, and the studs and the steel plate strips are arranged on the bottom steel plate; the steel bar mesh consists of transverse steel bars extending out of the ends of the two prefabricated UHPC bridge decks respectively and longitudinal steel bars laid additionally, the cast-in-place UHPC wet joint is poured between the bottom steel plate and the two prefabricated UHPC bridge decks, and the studs, the steel plate strips and the steel bar mesh are buried and covered.
Furthermore, the transverse bridge end of the prefabricated UHPC bridge deck is of a stepped structure, the stepped structures of the two prefabricated UHPC bridge deck plates are spliced and then form stepped grooves together with the bottom steel plate, and UHPC is cast in situ in the stepped grooves to form T-shaped cast-in-situ UHPC wet joints.
Furthermore, the steel plate strips and the splicing seams of the bottom steel plate are vertically welded on the bottom steel plate, the width of the steel plate strips is 3cm-5cm, the thickness of the steel plate strips is 0.3cm-1cm, and the distance between every two steel plate strips is 20cm-30 cm.
Further, the bottom steel plate splicing seam is welded at the position covering the steel plate strip and the splicing seams 2cm-3cm on two sides of the steel plate strip to form a bottom steel plate welding seam.
Further, the studs are vertically welded on the bottom steel plate, the height of each stud is 70cm-90cm, the diameter of each stud is 1cm-2cm, the longitudinal bridge spacing of the studs is 20cm-30cm, and the transverse bridge spacing of the studs is 15cm-20 cm.
Further, the reinforcing mesh comprises an upper reinforcing mesh and a lower reinforcing mesh, the mesh distance of the reinforcing meshes is 9-15 cm, and the distance between the upper reinforcing mesh and the lower reinforcing mesh is 2-5 cm.
Furthermore, the lengths of the upper layer of reinforcing mesh and the lower layer of reinforcing mesh extending out of the ends of the prefabricated UHPC bridge deck slab are different, the upper layer of reinforcing mesh extends out of the splicing seam position of the bottom steel plate, and the lower layer of reinforcing mesh extends out of the bottom end of the opposite prefabricated UHPC bridge deck slab.
Furthermore, the cast-in-place UHPC wet joint uses the ultra-high performance concrete which is the concrete containing steel fiber and no coarse aggregate, and has the compression strength not lower than 100MPa and the axial tensile strength not lower than 8 MPa.
The construction method of the longitudinal joint reinforcing structure of the assembled light composite beam comprises the following steps:
in the first step, fabricated lightweight composite beam units, i.e., UHPC deck slabs and steel structural beams, are prefabricated at the factory. The method specifically comprises the following steps: welding a web plate, an upper edge wing and a lower edge wing in a factory to form an I-shaped steel structure beam, and arranging and temporarily fixing the two steel structure beams in parallel; welding a shear connector at the corresponding position of the upper edge wing of the steel structure beam; welding a shear connector in advance at a corresponding position on the longitudinal seam bottom steel plate; erecting a mould above the steel structure beam, placing a bottom steel plate welded with a shear connector at the bottom of a longitudinal joint in advance, binding bridge deck plate ribs, properly bending steel bars extending out of a bridge deck to the joint, avoiding steel bar collision when erecting a combined beam unit, then pouring ultrahigh-performance concrete, and carrying out maintenance in time; and when the poured ultrahigh-performance concrete meets the design requirement, removing the template, and storing to a specified position to form the prefabricated assembly type light combined beam unit.
And secondly, erecting a light combination beam unit and a bottom steel plate which are arranged in parallel on a construction site to form a cast-in-place ultrahigh-performance concrete longitudinal joint area. And longitudinally splicing the bottom steel plate in an area where the steel strips are distributed and welding the bottom steel plate in front of and behind the area, paving the steel strips on the bottom steel plate at intervals of 20-30 cm, and performing spot welding and positioning.
And thirdly, straightening the bent reinforcing steel bars extending out of the prefabricated part, and pouring the ultra-high performance concrete into the longitudinal joint. And maintaining the cast-in-place longitudinal joint, and constructing auxiliary engineering and bridge deck pavement after the design strength is reached, namely completing the construction of the longitudinal joint structure between the units of the assembled light composite beam.
The invention relates to a longitudinal joint reinforcing structure of an assembled light composite beam, which is characterized in that upper-layer steel bars extend out from a prefabricated part to the center line of a joint, and lower-layer steel bars extend out from the prefabricated part to the edge of the joint of a lower layer; welding shear-resistant studs on the bottom steel plate of the longitudinal seam, then placing a steel plate strip on the bottom steel plate between two rows of shear-resistant studs which are adjacent in the longitudinal direction, and connecting the steel plate strip with the bottom steel plate by spot welding, so that the steel plate strip is arranged on the whole steel bridge deck at intervals along the bridge direction, and is arranged on the lower layer of the T-shaped seam along the transverse bridge direction; and finally, pouring UHPC on the upper layer to cover the bottom steel plate, the studs, the steel plate strips and the upper and lower layers of steel bars extending out of the prefabricated part. The structure performs double reinforcement on a weak UHPC joint to meet application requirements, and prevents the UHPC layer from cracking in advance at the joint to influence the stress performance and the durability of a bridge structure.
The invention provides an assembled light-duty combination beam longitudinal joint reinforcing structure, which has the beneficial effects that:
the steel bars at the joint of the traditional prefabricated bridge are more, complex and difficult to pour compactly, and the steel plate strips welded on the bottom steel plate in a spot mode can be equivalent to a simplified structure under the condition that the steel bar distribution rate is unchanged.
Two, when prefabricated assembly bridge seam crossing reinforcing bar is more, welding load is huge, consume manpower and materials in a large number and reduce construction speed, welding quality also can't guarantee, this kind of longitudinal joint structure only need be in advance on will welding the batten spot welding that has the short stud on the bottom steel sheet, and weld the local bottom steel sheet concatenation department of batten scope, need not adopt the construction equipment of complicated construction process and high input, need not the binder, adopt ordinary welding technique can accomplish the construction, its equipment investment is little, and easy operation, easy construction, it is lower to constructor's quality and construction process requirement.
And thirdly, the upper layer steel bars and the lower layer steel bars extending out of the prefabricated part in the T-shaped joint can ensure the connection of the upper layer new concrete and the lower layer new concrete of the joint, and can prevent the splicing part of the bottom steel plates from cracking as a weak link.
By adopting the longitudinal joint reinforcing structure of the assembled light composite beam, the possibility of cracking of longitudinal joints is basically eliminated, the stress performance of the longitudinal joints is improved, and the durability of a bridge deck system is enhanced.
In conclusion, the fabricated light-weight composite beam longitudinal joint reinforcing structure has the advantages of good tensile property of the bottom surface of the ultra-high-performance concrete layer, reliable bonding of the steel plate strips and the concrete layer, good crack resistance, simple and convenient construction and the like, has great use value and good economic benefit, and has wide application prospect in the field of fabricated light-weight composite beam structures.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic perspective view illustrating a longitudinal joint reinforcing structure of a fabricated light composite girder according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a cast-in-place UHPC wet joint of a fabricated light composite beam longitudinal joint reinforcing structure according to an embodiment of the invention;
FIG. 3 is a schematic structural diagram of a bottom steel plate of a longitudinal seam reinforced structure of the fabricated light composite beam according to the embodiment of the invention;
FIG. 4 is a schematic plane view of a pouring surface of a longitudinal joint reinforcing structure of the fabricated light composite beam according to an embodiment of the invention;
FIG. 5 is a partial structure diagram of a longitudinal section of a longitudinal seam reinforcing structure of the fabricated light composite beam according to an embodiment of the invention.
Detailed Description
In order to make the technical solutions in the embodiments of the present invention better understood and make the above objects, features, and advantages of the present invention more comprehensible, specific embodiments of the present invention are described below with reference to the accompanying drawings.
It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Referring to fig. 1 to 5, a fabricated lightweight composite girder longitudinal joint reinforcing structure of the present embodiment includes a prefabricated UHPC bridge deck 1 disposed at an upper portion and a steel structural girder 2 disposed at a lower portion, the longitudinal joint reinforcing structure being disposed between two composite girders, the longitudinal joint reinforcing structure including: a bottom steel plate 3, a stud 4, a steel plate strip 5, a reinforcing mesh 6 and a cast-in-situ UHPC wet joint 7; the bottom steel plate 3 is formed by splicing steel plates extending out of the bottom end parts of two prefabricated UHPC bridge decks 1 respectively, a bottom steel plate splicing seam 31 is formed at the splicing part of the two steel plates, and the studs 4 and the steel plate strips 5 are arranged on the bottom steel plate 3; the reinforcing mesh 6 is composed of transverse reinforcing steel bars extending out of the ends of the two prefabricated UHPC bridge decks 1 respectively and longitudinal reinforcing steel bars laid separately, a cast-in-place UHPC wet joint 7 is poured between the bottom steel plate 3 and the two prefabricated UHPC bridge decks 1, and the studs 4, the steel plate strips 5 and the reinforcing mesh 6 are buried.
As a preferred embodiment, the transverse bridge end parts of the prefabricated UHPC bridge deck slab 1 are provided with step structures 11, the step structures 11 of the two prefabricated UHPC bridge deck slabs 1 are spliced and then form step-shaped grooves together with the bottom steel plate 3, and UHPC is cast in situ in the step-shaped grooves to form T-shaped cast-in-situ UHPC wet joints 7.
Further preferably, the steel strips 5 and the bottom steel plate splicing seams 31 are vertically welded on the bottom steel plate 3, the width of the steel strips 5 is 3cm-5cm, the thickness of the steel strips 5 is 0.3cm-1cm, and the distance between every two steel strips 5 is 20cm-30 cm. The bottom steel plate splicing seam 31 is welded at the position covering the steel plate strip 5 and the splicing seams 2cm-3cm on two sides of the steel plate strip 5 to form a bottom steel plate welding seam 32.
Wherein the studs 4 are vertically welded on the bottom steel plate 3, the height of the studs 4 is 70cm-90cm, the diameter of the studs 4 is 1cm-2cm, the longitudinal bridge spacing of the studs 4 is 20cm-30cm, and the transverse bridge spacing of the studs 4 is 15cm-20 cm.
Wherein, the reinforcing mesh 6 comprises an upper reinforcing mesh 61 and a lower reinforcing mesh 62, the mesh distance of the reinforcing mesh 6 is 9cm-15cm, and the distance between the upper reinforcing mesh 61 and the lower reinforcing mesh 62 is 2cm-5 cm. The lengths of the upper layer of reinforcing mesh 61 and the lower layer of reinforcing mesh 62 extending out of the end parts of the prefabricated UHPC bridge deck slab 1 are different, the upper layer of reinforcing mesh 61 extends out to the position of the splicing seam 31 of the bottom steel plate, and the lower layer of reinforcing mesh 62 extends out to the bottom end part of the corresponding prefabricated UHPC bridge deck slab 1.
The cast-in-situ UHPC wet joint 7 uses the ultra-high performance concrete which contains steel fiber in the components, has no coarse aggregate, and has the compression strength not lower than 100MPa and the axial tensile strength not lower than 8 MPa.
According to the cast-in-place UHPC wet joint, the joint of the traditional prefabricated bridge has more steel bars, is complex and is difficult to pour compactly, and the adoption of the steel plate strip spot-welded on the bottom steel plate can be equivalent to the simplification of the structure under the condition of unchanged reinforcement ratio. The construction can be completed by adopting a common welding technology without adopting a complex construction process and high-investment construction equipment and a binder, the equipment investment is small, the operation is simple, the construction is easy, and the requirements on the quality of constructors and the construction process are low. The bottom steel plate splicing part can be prevented from cracking as a weak link. The stress performance is improved, and the durability of the bridge deck system is enhanced. The invention has great use value and good economic benefit, and has wide application prospect in the field of assembled light composite beam structures.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments.
The embodiments of the present invention are described in detail above with reference to the drawings, but the present invention is not limited to the described embodiments. Various changes, modifications, substitutions and alterations to these embodiments will occur to those skilled in the art without departing from the spirit and scope of the present invention.
Claims (8)
1. An assembled light-weight composite beam longitudinal joint reinforcement structure comprising a prefabricated UHPC deck slab (1) disposed at an upper portion and a steel structural beam (2) disposed at a lower portion, the longitudinal joint reinforcement structure being located between two of the composite beams, characterized in that the longitudinal joint reinforcement structure comprises: the steel plate (3) at the bottom, the studs (4), the steel plate strips (5), the reinforcing mesh (6) and the UHPC wet joint seam (7) in situ;
the bottom steel plate (3) is formed by splicing two steel plates extending out of the bottom end parts of the two prefabricated UHPC bridge decks (1), a bottom steel plate splicing seam (31) is formed at the splicing position of the two steel plates, and the stud (4) and the steel plate strip (5) are arranged on the bottom steel plate (3);
the steel bar net (6) is composed of transverse steel bars extending out of the end parts of the two prefabricated UHPC bridge decks (1) and additionally laid longitudinal steel bars, the cast-in-place UHPC wet joint (7) is poured between the bottom steel plate (3) and the two prefabricated UHPC bridge decks (1), and the studs (4), the steel plate strips (5) and the steel bar net (6) are embedded.
2. The fabricated light-weight composite beam longitudinal joint reinforcing structure according to claim 1, wherein a step structure (11) is arranged at the transverse bridge end of the prefabricated UHPC bridge deck slab (1), the step structures (11) of the two prefabricated UHPC bridge deck slabs (1) are spliced and then form a step-shaped groove together with the bottom steel plate (3), and UHPC is cast in situ in the step-shaped groove to form a T-shaped cast-in-situ UHPC wet joint (7).
3. The fabricated light-weight composite beam longitudinal joint reinforcing structure as claimed in claim 2, wherein the steel plate strips (5) and the bottom steel plate splicing joints (31) are vertically welded on the bottom steel plate (3), the width of the steel plate strips (5) is 3cm-5cm, the thickness of the steel plate strips (5) is 0.3cm-1cm, and the distance between every two steel plate strips (5) is 20cm-30 cm.
4. The fabricated light-weight composite beam longitudinal seam reinforcement structure according to claim 3, characterized in that the bottom steel plate splice seam (31) is welded to form a bottom steel plate weld seam (32) at a position covering the steel plate strip (5) and at 2cm-3cm splice seams at both sides of the steel plate strip (5).
5. The fabricated light-weight composite beam longitudinal seam reinforcing structure according to claim 4, wherein the pegs (4) are vertically welded on the bottom steel plate (3), the height of the pegs (4) is 70cm-90cm, the diameter of the pegs (4) is 1cm-2cm, the longitudinal bridge spacing of the pegs (4) is 20cm-30cm, and the transverse bridge spacing of the pegs (4) is 15cm-20 cm.
6. The fabricated light-weight composite girder longitudinal seam reinforcement structure according to any one of claims 1 to 5, wherein the steel bar nets (6) comprise an upper layer of steel bar net (61) and a lower layer of steel bar net (62), the mesh pitch of the steel bar net (6) is 9cm-15cm, and the distance between the upper layer of steel bar net (61) and the lower layer of steel bar net (62) is 2cm-5 cm.
7. The fabricated light-weight composite girder longitudinal joint reinforcing structure according to claim 6, wherein the lengths of the upper layer of reinforcing mesh (61) and the lower layer of reinforcing mesh (62) extending out of the ends of the prefabricated UHPC bridge deck slab (1) are different, the upper layer of reinforcing mesh (61) extends out to the position of the bottom steel plate splicing seam (31), and the lower layer of reinforcing mesh (62) extends out of the bottom end of the opposite prefabricated UHPC bridge deck slab (1).
8. The fabricated light-weight composite beam longitudinal joint reinforcing structure as claimed in any one of claims 1 to 5, wherein the cast-in-place UHPC wet joint (7) uses ultra-high performance concrete as concrete with steel fiber and no coarse aggregate in components, the compressive strength is not lower than 100MPa, and the axial tensile strength is not lower than 8 MPa.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104213505A (en) * | 2014-09-18 | 2014-12-17 | 湖南大学 | Joint structure of steel-ultra-high performance fiber concrete light composite beam and application thereof |
| WO2016023462A1 (en) * | 2014-08-15 | 2016-02-18 | 中交第二航务工程局有限公司 | Glued joint connecting method for steel-concrete composite beam of cable-stayed bridge |
| CN109338866A (en) * | 2018-11-14 | 2019-02-15 | 邵旭东 | A kind of microlight-type combined beam structure and its construction method suitable for Large Span Bridges |
| CN109610310A (en) * | 2018-12-12 | 2019-04-12 | 湖南大学 | Fashioned iron-UHPC combined bridge deck structure and its construction method suitable for cantilever position |
| CN111472250A (en) * | 2020-04-24 | 2020-07-31 | 天津市市政工程设计研究院 | Weldless small box girder wet joint structure and method adopting ultra-high performance concrete |
| CN112411366A (en) * | 2020-03-27 | 2021-02-26 | 中铁第四勘察设计院集团有限公司 | Wet joint connecting structure of precast concrete bridge deck and construction method |
| CN212670274U (en) * | 2020-06-01 | 2021-03-09 | 湖南大学 | Cast-in-place seam structure of super high performance concrete beam slab with pre-buried reinforced steel plate |
-
2021
- 2021-12-06 CN CN202111474720.8A patent/CN114150568A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016023462A1 (en) * | 2014-08-15 | 2016-02-18 | 中交第二航务工程局有限公司 | Glued joint connecting method for steel-concrete composite beam of cable-stayed bridge |
| CN104213505A (en) * | 2014-09-18 | 2014-12-17 | 湖南大学 | Joint structure of steel-ultra-high performance fiber concrete light composite beam and application thereof |
| CN109338866A (en) * | 2018-11-14 | 2019-02-15 | 邵旭东 | A kind of microlight-type combined beam structure and its construction method suitable for Large Span Bridges |
| CN109610310A (en) * | 2018-12-12 | 2019-04-12 | 湖南大学 | Fashioned iron-UHPC combined bridge deck structure and its construction method suitable for cantilever position |
| CN112411366A (en) * | 2020-03-27 | 2021-02-26 | 中铁第四勘察设计院集团有限公司 | Wet joint connecting structure of precast concrete bridge deck and construction method |
| CN111472250A (en) * | 2020-04-24 | 2020-07-31 | 天津市市政工程设计研究院 | Weldless small box girder wet joint structure and method adopting ultra-high performance concrete |
| CN212670274U (en) * | 2020-06-01 | 2021-03-09 | 湖南大学 | Cast-in-place seam structure of super high performance concrete beam slab with pre-buried reinforced steel plate |
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Application publication date: 20220308 |