阅读说明：本技术 一种耐久的腹板对接式预制结合梁桥及施工方法 (Durable web butt-joint type prefabricated combined beam bridge and construction method ) 是由 张强 刘沐宇 苗润池 马润平 许磊平 李方敏 朱东明 付建辉 刘芸欣 霍学晋 胡 于 2020-11-03 设计创作，主要内容包括：本申请涉及一种耐久的腹板对接式预制结合梁桥及施工方法,其包括预制结合梁,所述预制结合梁包括：钢主梁,所述钢主梁的至少一侧设有多个横向剪力钉；底层桥面板,其通过横向剪力钉与钢主梁固定；顶层桥面板,其铺设于底层桥面板上。该结合梁桥能够在节省施工中钢材用量的同时使钢混结合面抗裂性能好、整体结构耐久性优、抗拔和抗剪性能强。(The application relates to a durable web butt-joint type prefabricated bond beam bridge and a construction method, wherein the durable web butt-joint type prefabricated bond beam bridge comprises a prefabricated bond beam, and the prefabricated bond beam comprises: the shear device comprises a steel main beam, wherein at least one side of the steel main beam is provided with a plurality of transverse shear nails; the bottom bridge deck is fixed with the steel main beam through a transverse shear nail; and the top bridge deck is laid on the bottom bridge deck. The combined beam bridge can save the steel consumption in construction, and simultaneously lead the steel-concrete combined surface to have good crack resistance, excellent durability of the whole structure and strong pulling resistance and shearing resistance.)

1. A durable web-butted, prefabricated bonded beam bridge, comprising:

a prefabricated bond beam (1), said prefabricated bond beam (1) comprising:

-a steel main beam (2), at least one side of the steel main beam (2) being provided with a plurality of transverse shear pins (3);

-a bottom deck slab (4), the bottom deck slab (4) being fixed with the main steel beam (2) by the transverse shear nails (3);

the top deck bridge deck slab (6), the top deck bridge deck slab (6) is laid on bottom deck bridge deck slab (4).

2. A durable web-butt precast bonded girder bridge according to claim 1, wherein a plurality of anchoring bars (5) are embedded in the bottom deck slab (4);

the top deck bridge deck (6) is combined with the bottom deck bridge deck (4) through the anchoring steel bars (5).

3. A durable web-butted prefabricated bonded beam bridge as claimed in claim 2, wherein: the anchoring steel bars (5) are arranged at equal intervals along the longitudinal bridge direction and the transverse bridge direction respectively.

4. A durable web-butted prefabricated bonded beam bridge as claimed in claim 1, wherein: the transverse shear nails (3) are arranged at equal intervals along the longitudinal bridge direction.

5. A durable web-butted type prefabricated bonded beam bridge as claimed in claim 1, wherein one side of the steel main beam (2) provided with the transverse shear nails (3) is also provided with concave-convex tooth grooves (7);

the steel main beam (2) is combined with the bottom bridge deck (4) through the concave-convex tooth grooves (7).

6. A durable web-butt precast bonded girder bridge according to claim 5, wherein: the concave-convex tooth grooves (7) are omega-shaped concave-convex tooth grooves.

7. A durable web-butted prefabricated bonded beam bridge as claimed in claim 1, wherein: a plurality of prefabricated combination beams (1) are erected along the transverse bridge direction;

and the adjacent prefabricated combination beams (1) are spliced through transverse connecting seams (8).

8. A method of constructing a durable web-butt precast bonded girder bridge based on a durable web-butt precast bonded girder bridge according to any one of claims 1 to 7, comprising:

a transverse shear pin (3) is preset at one side of the steel girder (2);

fixing the bottom deck slab (4) and the steel main beam (2) through the transverse shear nails (3) to form a prefabricated combined beam (1);

and (3) combining the top deck bridge deck (6) with the prefabricated combination beam (1).

9. A method of constructing a durable web-butted type prefabricated bonded beam bridge as claimed in claim 8,

the method comprises the steps that before a transverse shear nail (3) is preset on one side of a steel main beam (2), a concave-convex tooth groove (7) is prefabricated on one side of the steel main beam;

after the prefabricated combined beam (1) is formed, the concave-convex tooth grooves (7) are embedded into the bottom bridge deck (4).

10. A method of constructing a durable web-butted type prefabricated bonded beam bridge as claimed in claim 9,

splicing the prefabricated combination beam (1) before or after combining the top deck bridge deck (6) and the prefabricated combination beam (1).

Technical Field

The invention relates to the field of bridge engineering, in particular to a durable web butt-joint type prefabricated combined beam bridge and a construction method.

Background

With the acceleration of the urbanization process in China, the construction of municipal bridges is developed towards the goals of rapidness, greenness, environmental protection and friendliness, and the basic requirements for realizing the goals of lightness, industrialization, standardization, assembly and rapidness are met. The steel-concrete composite bridge is in a bridge structure form that a concrete bridge deck is connected with a steel main beam through a shear connector to form integral common stress. Compared with the traditional concrete bridge, the steel-concrete combined bridge has light dead weight, good anti-seismic performance and high construction speed, obviously increases the clearance under the bridge, and simultaneously improves the landscape effect of the bridge; compared with a steel bridge, the steel bridge has the advantages of good economy, improved integral bending resistance bearing capacity, avoidance of the difficult problem that a pavement layer of the steel bridge is easy to damage, and continuous wide application in bridge construction due to the obvious technical and economic comprehensive advantages.

In the related technology, the steel-concrete composite beam is mostly combined with a concrete slab by adopting an I-shaped steel beam, a flange plate on the I-shaped steel beam is provided with a shear nail or a shear key, and the flange on the I-shaped steel beam is near a neutral axis of the composite structure, so that the stress is small, the steel performance cannot be fully exerted, and the steel consumption of the whole structure is large. However, the concrete on the steel-concrete joint surface usually cracks, the shearing force is not uniformly transferred, and the durability of the steel-concrete composite beam is unstable, so that the problem of shearing resistance of the steel-concrete joint surface is always a difficult problem.

Disclosure of Invention

The embodiment of the invention provides a durable web butt-joint type prefabricated combined beam bridge and a construction method, which can save the steel consumption in construction and simultaneously ensure that a steel-concrete combined surface has good crack resistance, excellent durability of the whole structure and strong pulling resistance and shearing resistance.

In a first aspect, a durable web-butted, prefabricated bond beam bridge is provided that includes a prefabricated bond beam and an underlying deck slab. The precast bonding beam includes: the bridge comprises a steel main beam and a bottom deck slab, wherein at least one side of the steel main beam is provided with a plurality of transverse shear nails, and the bottom deck slab is fixed with the steel main beam through the transverse shear nails; the top deck bridge deck is laid on the bottom deck bridge deck.

In some embodiments, a plurality of anchoring steel bars are embedded in the bottom bridge deck; the top deck bridge deck is combined with the bottom deck bridge deck through the anchoring steel bars.

In some embodiments, the anchoring bars are equally spaced along the longitudinal and transverse bridge directions, respectively.

In some embodiments, the transverse shear nails are equally spaced along the longitudinal bridge.

In some embodiments, one side of the steel main beam provided with the transverse shear nails is also provided with concave-convex tooth grooves; and the steel main beam is combined with the bottom bridge deck through the concave-convex tooth grooves.

In some embodiments, the indentations are omega-shaped indentations.

In some embodiments, a plurality of the prefabricated bond beams are erected along a transverse bridge direction; and adjacent prefabricated combination beams are spliced through transverse connecting seams.

In a second aspect, there is provided a method for constructing a durable web-butt precast bonded girder bridge, which is used for the above-mentioned durable web-butt precast bonded girder bridge, and includes: presetting a transverse shear nail at one side of the steel girder; fixing the bottom deck slab and the steel main beam through the transverse shear nails to form a prefabricated combined beam; and combining the top deck bridge deck with the prefabricated combination beam.

In some embodiments, before the presetting of the transverse shear nails on one side of the steel main beam, a concave-convex tooth groove is prefabricated on one side of the steel main beam; and after the prefabricated combined beam is formed, the concave-convex tooth grooves are embedded into the bottom layer bridge deck.

In some embodiments, splicing the prefabricated bond beams is further included before or after bonding the top deck bridge deck to the prefabricated bond beams.

The technical scheme provided by the invention has the beneficial effects that:

the embodiment of the invention provides a durable web butt-joint type prefabricated combined beam bridge, because the bottom bridge deck in the structure is in web butt joint with a steel girder through a transverse shear nail arranged in the steel girder, compared with the traditional I-shaped steel girder structure, the bridge has the advantages that the pulling resistance and the shearing resistance are better, and the steel consumption is reduced.

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 view of a durable web-butted type prefabricated bonded beam bridge according to an embodiment of the present invention;

FIG. 2 is a schematic view of a prefabricated bond beam provided by an embodiment of the present invention;

fig. 3 is a schematic view of a prefabricated bond beam with anchoring bars according to an embodiment of the present invention;

FIG. 4 is a schematic view of a plurality of prefabricated bond beams installed in a transverse bridge direction according to an embodiment of the present invention;

FIG. 5 is a schematic vertical view of a steel main beam along a longitudinal bridge direction according to an embodiment of the invention;

fig. 6 is a schematic elevation view of a steel main beam provided with concave-convex tooth grooves along a longitudinal bridge direction according to an embodiment of the present invention;

fig. 7 is a schematic elevation view illustrating a combination of a bottom deck slab and a top deck slab with embedded anchoring bars according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of a splicing manner of a prefabricated bond beam according to an embodiment of the present invention;

fig. 9 is a schematic diagram of a splicing manner of the prefabricated bond beam according to the embodiment of the present invention.

Reference numerals: 1. prefabricating a combined beam; 2. a steel main beam; 3. a transverse shear pin; 4. a bottom deck slab; 5. anchoring the reinforcing steel bars; 6. a top deck bridge deck; 7. concave-convex tooth grooves; 8. and transverse connecting seams.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

The embodiment of the invention provides a durable web butt-joint type prefabricated bond beam bridge, which comprises a prefabricated bond beam 1 and a top bridge deck 6, as shown in figures 1 and 2. The prefabricated bond beam 1 includes: the steel girder 2 and top deck bridge deck 4, wherein at least one side of steel girder 2 is equipped with a plurality of horizontal shear force nails 3, and bottom deck bridge deck 4 is fixed with steel girder 2 through horizontal shear force nail 3. The top deck bridge deck 6 is laid on the bottom deck bridge deck 4. A plurality of prefabricated combination beam 1 along horizontal bridge to the concatenation erect, form holistic combination beam bridge. Because the bridge can directly produce vertical upper and lower alternating load, promptly pull up the power on the girder under the wheel shifting load effect. The transverse shear nails 3 are arranged on the side surfaces of the main beams, the transverse arrangement can effectively resist the upward pulling force, a strong pulling-resistant effect is achieved, and compared with the longitudinal shear nails or shear keys arranged in the traditional I-shaped steel main beam structure, the transverse shear nails can fully exert the pulling-resistant and shearing-resistant performances of the shear nails. Meanwhile, the bottom deck bridge deck 4 in the structure is in web butt joint with the steel girder 2 through the transverse shear nails 3 arranged in the steel girder 2, so that the arrangement of a top steel plate in the traditional I-shaped steel girder structure is omitted, and the using amount of steel is reduced. In this embodiment, the top deck slab 4 and the top deck slab 6 are made of concrete materials, including ordinary concrete, high-performance concrete, recycled concrete, and the like.

In some embodiments, as shown in fig. 3, a plurality of anchoring bars 5 are embedded in the bottom deck slab 4, and the top deck slab 6 is coupled to the bottom deck slab 4 via the anchoring bars 5. The anchoring steel bars combine the bottom deck slab 4 and the top deck slab 6 to form a whole body, so that the local cracking of the concrete structure is prevented. Preferably, the anchoring bar 5 is a transverse anchoring bar, and the bottom deck slab and the top deck slab are secondarily combined to form a whole by the anchoring bar 5. Preferably, as shown in fig. 4 and 7, the anchoring steel bars 5 are arranged at equal intervals along the longitudinal bridge direction and the transverse bridge direction, respectively, so as to facilitate design and construction. In some embodiments, the anchoring bars 5 have a diameter of 12mm to 20mm, a height of 150mm to 250mm, a longitudinal bridge spacing of 200mm to 300mm, and a transverse bridge spacing of 300mm to 400 mm.

As shown in fig. 5, in some embodiments, the transverse shear nails 3 are equally spaced along the longitudinal bridge. The shearing force can be transmitted more uniformly, the durability is more stable, and the design and the construction are convenient. Preferably, the diameter of the transverse shear nails 3 is 12 mm-25 mm, the length of the transverse shear nails is 120 mm-150 mm, and the distance between the transverse shear nails 3 along the longitudinal bridge direction is 200 mm-300 mm.

As shown in fig. 6, in some embodiments, the steel main beam 2 is further provided with concave-convex tooth grooves 7 on the side provided with the transverse shear nails 3; the steel main beam 2 is combined with the bottom bridge deck 4 through concave-convex tooth grooves 7. The concave-convex tooth grooves 7 can be meshed with the bottom bridge deck slab 4, so that the combination of the steel main beam 2 and the bottom bridge deck slab 4 is more stable. Preferably, the concave-convex tooth grooves 7 are omega-shaped concave-convex tooth grooves, the height of the concave-convex tooth grooves is 150-250 mm, and the width of the concave-convex tooth grooves is 300-500 mm.

As shown in fig. 4, in some embodiments, several prefabricated bond beams 1 are erected in the transverse bridge direction; and adjacent prefabricated combination beams 1 are spliced through the transverse connecting seam 8.

As shown in fig. 8, in some embodiments, several prefabricated bond beams 1 are erected in the transverse bridge direction; the top deck slab 6 can be combined with the prefabricated combination beam 1 to form an integral prefabricated member and then spliced through the transverse connecting seam 8.

In some embodiments, as shown in fig. 9, a plurality of steel main beams of the prefabricated bond beam 1 are fixed to an integrated base plate to form a box-shaped structure, so as to enhance the torsion resistance of the main beams and form a more stable bond beam structure.

The embodiment of the invention provides a construction method of a durable web plate butt-joint type prefabricated combined beam bridge, which comprises the following steps: a transverse shear pin 3 is preset at one side of the steel girder 2; fixing a bottom deck slab 4 and a steel main beam 2 through a transverse shear nail 3 to form a prefabricated combined beam 1; the top deck bridge deck 6 is joined to the prefabricated bond beam 1. The prefabricated combined beam 1 is manufactured in a factory, so that the difficulty and the occupied time of field construction can be reduced. In some embodiments, the completed prefabricated bond beam 1 is transported to a construction site and erected to a temporary support by hoisting.

In some embodiments, before the transverse shear nails 3 are preset on one side of the steel girder 2, prefabricating concave-convex tooth grooves 7 on one side of the steel girder; after the prefabricated bond beam 1 is formed, the concave-convex gullets 7 are embedded into the underlying deck slab 4.

In some embodiments, splicing the prefabricated bond beam 1 is also included before or after joining the top deck bridge deck 6 to the prefabricated bond beam 1. Specifically, the top deck bridge deck 6 may be divided into a plurality of sections for construction, each section is combined with the prefabricated combination beam 1 to form a whole, and the prefabricated combination beam 1 with the top deck bridge deck 6 is erected and spliced along the transverse bridge direction; the prefabricated combined beam 1 can be erected and spliced along the transverse bridge direction to form a whole, and then the top deck bridge deck 6 is combined with the whole.

The durable web butt-joint type prefabricated combined beam bridge and the construction method provided by the embodiment of the invention have the following beneficial effects that: the steel girder web and the concrete bridge deck have good overall bonding performance, the overall structure has excellent durability, strong anti-pulling and anti-shearing performances, good concrete anti-cracking performance and less steel consumption, has the characteristics of light hoisting weight, high prefabricating speed, short construction period, small occupied area, low noise and the like, solves the difficult problems of serious traffic obstruction and environmental pollution under the bridge caused by the construction of urban viaducts and overpasses, and has wide application prospect in municipal bridges.

In the description of the present invention, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

It is to be noted that, in the present invention, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.