CN111469267A - Wood-UHPC combined box girder and preparation method thereof - Google Patents
Wood-UHPC combined box girder and preparation method thereof Download PDFInfo
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- CN111469267A CN111469267A CN202010315628.6A CN202010315628A CN111469267A CN 111469267 A CN111469267 A CN 111469267A CN 202010315628 A CN202010315628 A CN 202010315628A CN 111469267 A CN111469267 A CN 111469267A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
- B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
- B28B23/04—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members the elements being stressed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/14—Producing shaped prefabricated articles from the material by simple casting, the material being neither forcibly fed nor positively compacted
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
- B28B11/245—Curing concrete articles
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- 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
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
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Abstract
The invention discloses a wood-UHPC combined box girder which comprises a UHPC top plate, a laminated wood web plate, a laminated wood bottom plate and a laminated wood cross beam arranged at the fulcrum position of a girder body, wherein the laminated wood bottom plate, the laminated wood cross beam and the laminated wood web plate are connected by adopting transverse prestressed steel bars, and the laminated wood web plate and the UHPC top plate are connected by adopting a shear connector. The invention also relates to a preparation method of the combined box girder. The invention has reasonable structural design, has the advantages of light dead weight, high rigidity, capability of integral prefabrication, convenient transportation and installation, good hoisting stability and the like, solves the problem of span limitation of the common wood-concrete composite beam due to small rigidity, meets the requirement of green transformation development of bridge construction in China, and has better application prospect in bridge engineering.
Description
Technical Field
The invention relates to the technical field of bridge engineering, in particular to a wood-UHPC (Ultra-High Performance concrete) combined box girder and a preparation method thereof.
Background
By the end of 2018, in a bridge system of a highway in China, the number of the small and medium-span bridges accounts for nearly 90%, and a considerable number of the small and medium-span bridges are distributed on a low-grade highway. The bridge is mostly built by steel and concrete materials, and the problems of high energy consumption and high pollution are very prominent in the construction process; after the service period is over, the waste can not be recycled and becomes building waste, and the problems seriously restrict the sustainable development of national economy of China. With the progress of society and the development of economy, the traditional environmental protection concept and civil engineering facilities cannot meet the needs of people, and the development of novel efficient environmental protection building materials becomes a new demand and challenge in the field of civil engineering in the 21 st century.
The wood is an environment-friendly material, has the characteristics of reproducibility, high strength-to-mass ratio, low energy consumption, impact resistance, easy decomposition, good elasticity, easy processing and the like, and is one of the earliest building materials used by human beings in bridge construction. The wood structure bridge has a bright history in China, and ancient people start building the wood structure bridge in the period of business week as early as possible. However, since the 20 th century, the structural timber in China is almost completely harvested, steel and cement gradually become main building materials, and the development of wood structural bridges is in a standstill. However, the developed countries in Europe and America continuously and deeply research on the wood structure bridge, along with the rapid development of the processing, protection and connection technology of modern wood products, the mechanical property, the corrosion resistance and the fire resistance of wood are greatly improved, the requirements of high-grade design load and structural durability can be met, the modern wood structure is widely applied to small and medium-span bridges, and the wood-concrete composite beam bridge is an important type. The wood-concrete composite beam can fully exert the characteristics of high tensile strength of wood grain and high compressive strength of concrete, and has higher bending rigidity, better integrity, fire resistance and durability compared with the traditional wood structure.
At present, the existing wood-concrete composite beam generally adopts a glued wood main beam and common concrete to form a structure, and the creep effect of the common concrete and the creep effect of wood bring obvious internal force redistribution, so that the design of the wood-concrete composite beam is controlled by a long-term deformation limit value, and the material strength is difficult to exert; concrete slabs are thicker, and the self weight of the wood-concrete composite beam is generally larger.
For example, prior art 1 (publication No. CN 102888812A) discloses a wood and concrete combined box girder, which comprises a concrete top plate, a concrete bottom plate and a wood web. It has problems that: 1) the self weight is great, compared with UHPC material, the thickness of the plate required by the common concrete plate is larger, so that the self weight of the wood-concrete combined box girder is larger, and the spanning capability is limited; 2) the creep effect of common concrete is large, and the creep effect of wood makes the long-term deformation of the composite beam large, the design is generally limited and controlled for the long-term deformation, and the material strength is difficult to give full play; 3) the common concrete has low tensile strength, is easy to crack and leak water to cause the durability reduction of the wooden main beam, and particularly for the bottom plate concrete positioned in a tension area, more measures are needed to ensure the crack resistance safety degree of the bottom plate concrete, so that the construction difficulty is increased and the economical efficiency of the bottom plate concrete is weakened.
In the prior art, structures formed by combining a laminated wood main beam and ultrahigh-performance concrete are adopted, but the structures are generally T-shaped sections, and the overall rigidity, particularly the transverse rigidity, is lower. These factors limit the application and development of the wood-concrete composite girder bridge.
Disclosure of Invention
The invention provides a wood-UHPC combined box girder for overcoming the problems in the prior art, and compared with a common wood-concrete combined girder bridge structure, the combined box girder has the advantages of large integral rigidity, light dead weight, strong spanning capability, small shrinkage and creep of a UHPC top plate and the like. The specific technical scheme is as follows.
The wood-UHPC combined box girder is characterized by comprising a UHPC top plate, a laminated wood web plate, a laminated wood bottom plate and a laminated wood cross beam, wherein the UHPC top plate, the laminated wood web plate and the laminated wood bottom plate all extend along the longitudinal direction, more than two laminated wood web plates are arranged at intervals in the transverse direction, the upper surface of each laminated wood web plate is connected with the lower surface of the UHPC top plate, and the laminated wood bottom plate is arranged between the lower ends of two adjacent laminated wood web plates; the UHPC top plate is parallel to the laminated wood bottom plate;
the laminated wood cross beam is positioned at the fulcrum position of the wood-UHPC combined box beam, and the laminated wood cross beam is filled between two adjacent laminated wood webs;
the wood-UHPC combined box girder also comprises transverse prestressed steel bars transversely penetrating through the laminated wood beam and the laminated wood web plate, and transverse prestressed steel bars transversely penetrating through the laminated wood bottom plate and the laminated wood web plate;
the laminated wood web plate, the laminated wood beam and the laminated wood bottom plate all comprise a plurality of mutually overlapped wood plates.
It should be noted that: a plurality of the wood-UHPC combined box girders are hoisted to a preset position to form a bridge, the longitudinal direction represents the length direction of the bridge, and the transverse direction represents the transverse direction of the bridge. The wood-UHPC composite box girder usually comprises two pivot positions, one at each end of its longitudinal direction, but it may also have more than two pivot positions.
By adopting the technical scheme, the combined box girder is in a box section form, and compared with a common wood-concrete combined girder bridge structure, the combined box girder has the advantages of large rigidity, enhanced spanning capability and good hoisting stability; the top plate adopts UHPC, so that the dead weight of the beam body can be reduced, and the shrinkage and creep of the top plate are reduced, thereby improving the spanning capability of the structure and enhancing the durability of the structure; the laminated wood bottom plate is adopted, and due to the prestress, compared with a common laminated wood structure, the shear hysteresis effect is greatly reduced, and the bending rigidity and the spanning capability of the structure can be improved; the whole wood-UHPC combined box girder can be prefabricated and molded in advance, the self weight of the prefabricated combined box girder is light, the difficulty of transporting and installing the girder body can be reduced, the transporting and installing speed is improved, the construction period is shortened, and the material consumption of a lower structure can be reduced; the combined box girder is prefabricated in a girder manufacturing field, so that the influence of weather on construction is reduced, and the construction quality is improved.
Further, the grain following direction of the laminated wood web plate is a longitudinal direction, and the board surface of the laminated wood web plate is parallel to the UHPC top board; the grain-following direction of the laminated wood bottom plate is the longitudinal direction, and the board surface of the laminated wood bottom plate is perpendicular to the transverse direction. Thus, the characteristic of high tensile strength of the wood along the grain direction can be fully exerted.
Further, the grain-following direction of the laminated wood beam is perpendicular to the UHPC top plate, and the board surface of the laminated wood beam is perpendicular to the transverse direction.
Further, the thickness of the laminated wood web in the transverse direction is smallest at the center in the longitudinal direction, the thickness is largest at the fulcrum in the transverse direction, and the thickness is linearly reduced from the fulcrum to the center in the longitudinal direction. Therefore, the shear strength of the beam body along the longitudinal direction of the bridge can be ensured to be consistent with the shear change rule of the beam body along the longitudinal direction of the bridge.
Furthermore, a plurality of shear connectors are arranged at intervals along the longitudinal direction of the laminated wood web plate, the lower ends of the shear connectors are located in the laminated wood web plate, and the upper ends of the shear connectors are located in the UHPC top plate. The shear connector can adopt nail type connectors, and is favorable for ensuring the connection strength and rigidity of the UHPC top plate and the laminated wood web plate.
Furthermore, the laminated wood web plate is provided with a groove corresponding to each shear connector. A part of the UHPC top plate is positioned in the groove, so that the connection strength and reliability of the UHPC top plate and the laminated wood web plate in the longitudinal direction and the transverse direction are further improved.
Further, a steel backing plate is arranged on the outer side of the laminated wood web plate on the outermost side and used for anchoring the transverse prestressed steel bars. Therefore, the stress at the anchoring point can be uniformly distributed, and the local damage of the laminated wood web caused by overlarge local stress is avoided.
Further, the transverse prestressed steel bars are finish-rolled deformed steel bars. The finish-rolled deformed steel bar has the advantages of small prestress loss and convenient anchoring, and the composite action of the laminated wood base plate (or the laminated wood beam) and the laminated wood web plate can be greatly enhanced by adopting the connection mode.
Furthermore, at the position of the pivot, the wood board of the laminated wood beam is butted with the wood board of the laminated wood base plate in a cross-overlapping mode, and the rear ends of the transverse prestressed reinforcements at the butted position penetrate through all the cross-overlapped wood boards and are respectively anchored on the steel base plate at the outer side of the laminated wood web plate. Therefore, the composite effect of the laminated wood cross beam and the laminated wood bottom plate can be improved, and the integrity of the box beam is enhanced.
Based on the same inventive concept, the invention also relates to a preparation method of the wood-UHPC combined box girder, which mainly comprises the following steps:
1) manufacturing a laminated wood web plate, a laminated wood beam and a laminated wood bottom plate, reserving a pore channel of a transverse prestressed reinforcement, implanting a shear connector at the top of the laminated wood web plate, and sticking a steel base plate on the outer side of the laminated wood web plate on the outermost side;
2) assembling the beam body, gluing the connecting surfaces of the laminated wood bottom plate, the laminated wood cross beam and the laminated wood web, mutually adhering the laminated wood bottom plate, the laminated wood cross beam and the laminated wood web of the beam body together, and temporarily fixing the beam body;
3) penetrating, tensioning and anchoring the transverse prestressed reinforcement, and then injecting glue into the pore channel;
4) and carrying out template installation and reinforcement binding on the UHPC top plate, then pouring ultra-high performance concrete, and carrying out steam curing on the ultra-high performance concrete after initial setting to finish the preparation of the wood-UHPC combined box girder.
The wood-UHPC combined box girder bridge structure has the advantages of excellent performance, light dead weight, large integral rigidity, obviously improved spanning capability compared with the common wood-concrete combined structure, high transportation and hoisting speed, greatly reduced shrinkage creep of the top plate and accordance with the requirement of green transformation development of bridge construction in China. The structure is suitable for the construction of medium and small bridges, can be used for simply supported beams and continuous system bridges, and has a good application prospect in bridge engineering.
Drawings
FIG. 1 is an elevation view of a wood-UHPC composite box beam; FIG. 2 is a plan view of a wood-UHPC composite box beam (the upper half being a view of the top plate of UHPC and the lower half being a view with the top plate of UHPC removed); FIG. 3 is a cross-sectional view of a fulcrum location of a wood-UHPC composite box beam; FIG. 4 is a mid-span cross-sectional view of a wood-UHPC composite box girder; fig. 5 is a schematic view of anchoring of the transverse prestressed reinforcement.
In the figure: 1-UHPC top plate, 2-laminated wood bottom plate, 3-laminated wood web plate, 4-laminated wood cross beam, 5-shear connector, 6-transverse prestressed reinforcement and 7-steel backing plate.
Detailed Description
The present invention is described in further detail below with reference to the attached drawing figures.
Referring to fig. 1-5, the wood-UHPC combined box girder bridge structure is a single-box three-chamber box girder, and includes a UHPC top plate 1, four laminated wood webs 3, three laminated wood bottom plates 2, and laminated wood beams 4 disposed at supporting points at two ends of the girder, wherein each of the laminated wood webs 3, the laminated wood beams 4, and the laminated wood bottom plates 2 includes a plurality of mutually overlapped wood plates.
The upper surface of each laminated wood web plate 3 is connected to the lower surface of the UHPC top plate 1, and the laminated wood bottom plate 2 is arranged between the lower ends of two adjacent laminated wood web plates 3; the UHPC top plate 1 is parallel to the laminated wood bottom plate 2.
The laminated wood beam 4 is positioned at the fulcrum position of the wood-UHPC combined box beam, and the laminated wood beam 4 is filled between two adjacent laminated wood webs 3.
The laminated wood bottom plate 2 and the laminated wood web plate 3 are anchored together through transverse prestressed reinforcements 6, the laminated wood cross beam 4 and the laminated wood web plate 3 are anchored together through the transverse prestressed reinforcements 6, and the laminated wood web plate 3 is connected with the UHPC top plate 1 through a shear connector 5.
The thickness of the laminated wood web 3 in the transverse direction is changed along the longitudinal direction of the bridge, and the thickness is larger and equal from the beam end to the position 1 m away from the fulcrum; 6 minutes (1/6 for beam) to midspan, the thickness is smaller and equal; the thickness is changed linearly from the 6 minutes point to the position 1 meter away from the fulcrum.
The top of the laminated wood web plate 3 is provided with a groove at intervals along the longitudinal direction of the bridge, and a shear connecting piece 5 is implanted in the groove, wherein the shear connecting piece 5 is preferably a stud; and meanwhile, a steel backing plate 7 is adhered to the corresponding position of the outer side of the laminated wood web plate 3 at the outermost side for dispersing strong pre-compression stress transmitted by the anchor backing plate.
The transverse prestressed reinforcement 6 sequentially passes through the laminated wood web 3 at the outermost side, the laminated wood bottom plate 2 (or the laminated wood beam 4), the laminated wood web 3 at the secondary outer side, the laminated wood bottom plate 2 (or the laminated wood beam 4) and the laminated wood web 3 at the outermost side. The strong composite action of the laminated wood base plate 2 (or the laminated wood cross beam 4) and the laminated wood web plate 3 is ensured.
The transverse prestressed reinforcement 6 preferably adopts a fine-pitch threaded steel, after tensioning is completed, a fine-pitch threaded steel nut is adopted to anchor the transverse prestressed reinforcement on the anchor backing plate, and then glue injection is carried out on the hole. The adoption of the fine-rolled deformed steel bar can reduce the prestress loss, and the glue injection to the channel can strengthen the bonding of the prestressed reinforcement and the laminated wood base plate 2 and protect the prestressed reinforcement from the erosion of the external environment.
At the position of a pivot, the wood plate of the laminated wood beam 4 is butted with the wood plate of the laminated wood base plate 2 in a cross-overlapping mode, and the rear ends of the transverse prestressed reinforcement 6 at the butted position penetrate through all the cross-overlapped wood plates and are respectively anchored on a steel base plate 7 on the outer side of the laminated wood web plate 3. The compound action of the laminated wood beam 4 and the laminated wood bottom plate 2 is ensured.
The longitudinal length of the wood-UHPC combined box girder in the embodiment is 25.6m, and the transverse width is 7.2 m.
The preparation method of the wood-UHPC combined box girder mainly comprises the following steps:
1) manufacturing a laminated wood web plate 3, a laminated wood beam 4 and a laminated wood bottom plate 2 in a beam manufacturing field, reserving a pore channel (not shown) of a transverse prestressed reinforcement 6, forming a groove at the top of the laminated wood web plate 3, implanting a stud into the groove, and adhering a steel base plate 7 at the position of anchoring the transverse prestressed reinforcement 6 at the outer side of the laminated wood web plate 3 at the outermost side;
2) splicing the beam body, gluing the connecting surfaces of the laminated wood base plate 2, the laminated wood cross beam 4 and the laminated wood web 3, bonding the laminated wood base plate 2, the laminated wood cross beam 4 and the laminated wood web 3 of the beam body together, and temporarily fixing;
3) the transverse prestressed steel bars 6 are made of fine rolled deformed steel bars, all the transverse prestressed steel bars 6 are tied, fine rolled deformed steel bar nuts are screwed, then the transverse prestressed steel bars 6 are tensioned and anchored on a steel backing plate 7, and then pore channel glue injection is carried out;
4) carrying out template installation and steel bar binding on the UHPC top plate 1, then pouring ultra-high performance concrete, carrying out high-temperature steam curing at the temperature of between 90 and 100 ℃ after initial setting, and finishing the manufacturing of the precast beam after the curing is finished;
5) and carrying out transportation and hoisting of the prefabricated combined box girder.
The embodiments of the present invention are described above with reference to the drawings, and the embodiments and features of the embodiments of the present invention may be combined with each other without conflict. The present invention is not limited to the above-described embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many modifications without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. The wood-UHPC combined box girder is characterized by comprising a UHPC top plate (1), a laminated wood web plate (3), a laminated wood bottom plate (2) and a laminated wood cross beam (4), wherein the UHPC top plate (1), the laminated wood web plate (3) and the laminated wood bottom plate (2) extend along the longitudinal direction, more than two laminated wood web plates (3) are arranged at intervals in the transverse direction, the upper surface of each laminated wood web plate (3) is connected to the lower surface of the UHPC top plate (1), and the laminated wood bottom plate (2) is arranged between the lower ends of two adjacent laminated wood web plates (3); the UHPC top plate (1) is parallel to the laminated wood bottom plate (2);
the laminated wood cross beam (4) is positioned at the fulcrum position of the wood-UHPC combined box beam, and the laminated wood cross beam (4) is filled between two adjacent laminated wood webs (3);
the wood-UHPC combined box girder also comprises transverse prestressed steel bars (6) transversely penetrating through the laminated wood cross beam (4) and the laminated wood web plate (3), and transverse prestressed steel bars (6) transversely penetrating through the laminated wood bottom plate (2) and the laminated wood web plate (3);
the laminated wood web plate (3), the laminated wood beam (4) and the laminated wood base plate (2) all comprise a plurality of mutually overlapped wood plates.
2. A wood-UHPC composite box girder according to claim 1, characterised in that the grain-wise direction of the laminated wood web (3) is a longitudinal direction, the board surface of the laminated wood web (3) being parallel to the UHPC top board (1); the grain following direction of the laminated wood bottom plate (2) is the longitudinal direction, and the board surface of the laminated wood bottom plate (2) is perpendicular to the transverse direction.
3. A wood-UHPC box girder according to claim 1, characterised in that the grain-wise direction of the laminated wood beam (4) is perpendicular to the UHPC ceiling (1) and the board surface of the laminated wood beam (4) is perpendicular to the transverse direction.
4. A wood-UHPC composite box girder according to claim 1, characterised in that the thickness of the laminated wood web (3) in the transverse direction is smallest in the centre in the longitudinal direction and largest in the transverse direction at the fulcrum, and that the thickness has a linearly decreasing area from the fulcrum to the centre in the longitudinal direction.
5. A wood-UHPC composite box girder according to claim 1, characterised in that the laminated wood web (3) is provided with several shear connectors (5) at intervals along the longitudinal direction, the lower ends of the shear connectors (5) being located in the laminated wood web (3) and the upper ends being located in the UHPC top plate (1).
6. A wood-UHPC combined box girder according to claim 5, characterised in that the laminated wood web (3) is grooved for each shear connector (5).
7. A wood-UHPC composite box girder according to claim 1, characterised in that the outside of the outermost plywood web (3) is provided with steel tie plates (7) for anchoring the transverse prestressing tendons (6).
8. The wood-UHPC composite box girder according to claim 1, characterised in that the transverse prestressed reinforcement (6) is finish-rolled screw steel.
9. A wood-UHPC combined box girder according to claim 7, characterized in that, at the fulcrum position, the wood boards of the laminated wood beam (4) and the wood boards of the laminated wood bottom plate (2) are butted in a cross-overlapping manner, and at the butted position, the rear ends of the transverse prestressed reinforcements (6) penetrating through all the cross-overlapped wood boards are respectively anchored on the steel backing plates (7) outside the laminated wood web (3).
10. A method for manufacturing a wood-UHPC composite box girder according to any one of claims 1 to 9, essentially comprising the steps of:
1) manufacturing a laminated wood web plate (3), a laminated wood beam (4) and a laminated wood bottom plate (2), reserving a pore channel of a transverse prestressed reinforcement (6), implanting a shear connector (5) at the top of the laminated wood web plate (3), and pasting a steel base plate (7) at the outer side of the laminated wood web plate (3) at the outermost side;
2) splicing the beam body, gluing the connecting surfaces of the laminated wood base plate (2), the laminated wood cross beam (4) and the laminated wood web (3), mutually bonding the laminated wood base plate (2), the laminated wood cross beam (4) and the laminated wood web (3) of the beam body together, and temporarily fixing the beam body;
3) penetrating, tensioning and anchoring the transverse prestressed reinforcement (6), and then injecting glue into the pore channel;
4) and carrying out template installation and reinforcement binding on the UHPC top plate (1), then pouring ultra-high performance concrete, and carrying out steam curing on the ultra-high performance concrete after initial setting to finish the preparation of the wood-UHPC combined box girder.
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| CN202010315628.6A CN111469267B (en) | 2020-04-21 | 2020-04-21 | Wood-UHPC combined box girder and preparation method thereof |
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| CN202010315628.6A CN111469267B (en) | 2020-04-21 | 2020-04-21 | Wood-UHPC combined box girder and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112523515A (en) * | 2021-01-18 | 2021-03-19 | 华北水利水电大学 | Construction method of pre-bent laminated wood-concrete composite beam |
| CN112523516A (en) * | 2021-01-18 | 2021-03-19 | 华北水利水电大学 | Pre-bent laminated wood-concrete composite beam construction equipment based on crossbow method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5921053A (en) * | 1997-12-17 | 1999-07-13 | Metwood, Inc. | Internally reinforced girder with pierceable nonmetal components |
| CN102888812A (en) * | 2012-10-26 | 2013-01-23 | 长安大学 | Wood and concrete combined type box beam |
| CN206090273U (en) * | 2016-09-09 | 2017-04-12 | 湖南省交通规划勘察设计院 | Prefabricated UHPC of assembling of festival section wave form steel web combination box beam and cable -stay bridge |
| CN206289536U (en) * | 2016-12-23 | 2017-06-30 | 大连理工大学 | A kind of concrete box girder direction across bridge prestressed structure |
| CN207944318U (en) * | 2018-03-08 | 2018-10-09 | 中国铁路总公司 | A kind of railway simple supported box beam |
| CN208379412U (en) * | 2018-05-15 | 2019-01-15 | 中南林业科技大学 | A kind of steel-ultra-high performance concrete continuous combined case beam |
-
2020
- 2020-04-21 CN CN202010315628.6A patent/CN111469267B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5921053A (en) * | 1997-12-17 | 1999-07-13 | Metwood, Inc. | Internally reinforced girder with pierceable nonmetal components |
| CN102888812A (en) * | 2012-10-26 | 2013-01-23 | 长安大学 | Wood and concrete combined type box beam |
| CN206090273U (en) * | 2016-09-09 | 2017-04-12 | 湖南省交通规划勘察设计院 | Prefabricated UHPC of assembling of festival section wave form steel web combination box beam and cable -stay bridge |
| CN206289536U (en) * | 2016-12-23 | 2017-06-30 | 大连理工大学 | A kind of concrete box girder direction across bridge prestressed structure |
| CN207944318U (en) * | 2018-03-08 | 2018-10-09 | 中国铁路总公司 | A kind of railway simple supported box beam |
| CN208379412U (en) * | 2018-05-15 | 2019-01-15 | 中南林业科技大学 | A kind of steel-ultra-high performance concrete continuous combined case beam |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112523515A (en) * | 2021-01-18 | 2021-03-19 | 华北水利水电大学 | Construction method of pre-bent laminated wood-concrete composite beam |
| CN112523516A (en) * | 2021-01-18 | 2021-03-19 | 华北水利水电大学 | Pre-bent laminated wood-concrete composite beam construction equipment based on crossbow method |
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| CN111469267B (en) | 2021-07-23 |
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