Groove type hole web composite beam and concrete abutment joint and construction method thereof

Abstract

The application discloses a kind of slot hole web plate composite beam and concrete abutment node, it includes concrete abutment, steel beam overhanging section, steel beam embedded section, steel beam support, T slot hole connecting piece and concrete bridge deck slab.Steel beam embedded section is poured in abutment, and steel beam embedded section uses section steel, including upper flange, lower flange, the C web plate connecting upper flange and lower flange, and steel beam support;Steel beam overhanging section uses section steel, including upper flange, lower flange, the web plate connecting upper flange and lower flange.Steel beam upper flange is equipped with T slot hole connecting piece, strengthens the connection of abutment, bridge deck slab and steel beam.Steel beam overhanging section is equipped with several stiffening ribs to improve the carrying capacity of steel beam overall.The application also provides the construction method of the above-mentioned slot hole web plate composite beam and concrete abutment node.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of bridge engineering, and particularly relates to a slot hole web composite beam and concrete abutment joint. BACKGROUND

[0002] Compared with simply supported beam bridges, the integral steel-concrete composite beam bridge has obvious advantages. The integral abutment and the advantages of the steel-concrete composite beam are combined to form a steel-concrete integral abutment bridge. In addition to canceling expansion joints and bearings, solving the durability problem of expansion joints and bearings and reducing the maintenance cost of the bridge, the steel-concrete integral abutment bridge also has the advantages of light weight, large stiffness and strong spanning capacity, and is convenient for factory prefabrication and assembly construction.

[0003] The beam-abutment joint is a key part of the integral steel-concrete composite bridge. However, the beam-abutment joint of the current integral steel-concrete composite beam bridge often mixes welded stud connectors and perforated plate connectors, which requires a large number of connectors to be arranged in a limited space. The complex structure affects the pouring quality of the concrete and the stress is not clear, which can easily reduce the economic benefits.

[0004] Therefore, it is necessary to design a joint structure of an integral abutment and a steel beam which can reduce the local tensile stress of the concrete, enhance the stress performance of the beam-abutment joint and improve the construction efficiency on site. SUMMARY

[0005] The main technical problem to be solved by the present application is to provide a slot hole web composite beam and concrete abutment joint which can reduce the local tensile stress of the concrete, enhance the stress performance of the beam-abutment joint and improve the construction efficiency on site.

[0006] In order to solve the above technical problems, the present application provides a slot hole web composite beam and concrete abutment joint, which comprises a concrete abutment and a steel beam, wherein the embedded section of the steel beam is cast in the concrete abutment.

[0007] The embedded section of the steel beam is made of a profile steel, which comprises a first upper flange, a first lower flange, a first web connecting the first upper flange and the first lower flange, and a steel beam support.

[0008] The overhanging section of the steel beam is made of a profile steel, which comprises a second upper flange, a second lower flange, and a second web connecting the second upper flange and the second lower flange.

[0009] In a preferred embodiment, the concrete abutment comprises a lower pre-cast section and an upper post-cast section.

[0010] In a preferred embodiment, the first web is composed of two C-shaped webs, and the C-shaped webs are provided with C-shaped openings for the flow of concrete. The C-shaped webs are provided with a plurality of slot holes around the periphery for passing steel bars.

[0011] In a preferred embodiment: the steel beam support comprises a support bottom plate, a support web plate and a support trapezoidal plate;

[0012] The support trapezoidal plate is two, the support web plate is connected between the two support trapezoidal plates, and the support bottom plate is connected at the bottom of the two support trapezoidal plates and is perpendicular to the support web plate.

[0013] In a preferred embodiment: the support web plate is provided with an elliptical hole for the flow of concrete.

[0014] In a preferred embodiment: the first upper flange plate is provided with two rows of T-shaped groove hole connectors perpendicular to the first upper flange plate.

[0015] In a preferred embodiment: the steel beam is provided with a plurality of stiffening ribs connected to the first upper flange plate, the first lower flange plate, the first web plate and perpendicular to the first web plate.

[0016] The application also provides a construction method for a groove hole web plate composite beam and a concrete abutment joint as described above, comprising the following steps:

[0017] 1) Composite beam processing: in a steel structure processing plant, the first upper flange plate, the second lower flange plate, the first web plate and the steel beam support are connected into an embedded section of the steel beam through automatic welding; the second upper flange plate, the second lower flange plate, the second web plate and the stiffening rib are connected into an overhanging section of the steel beam; the T-shaped groove hole connector is welded above the first upper flange plate; and the concrete deck slab above the overhanging section of the steel beam is poured;

[0018] 2) Construction of the lower part of the abutment: after the bridge foundation is completed, the lower part of the abutment is poured and cured into shape;

[0019] 3) Composite beam hoisting construction: the composite beam is hoisted to the upper part of the lower part of the concrete abutment, and through the support of the steel beam support, the hoisted beam is in a simply supported state, and the weight of the concrete deck slab is completely borne by the steel beam;

[0020] 4) Construction of the upper part of the abutment: the penetrating steel bars of the T-shaped groove hole connector of the embedded section of the steel beam and the upper flange plate of the steel beam are installed, other ordinary steel bars are erected to form a steel cage, and then the upper part of the concrete abutment is poured, and after the concrete is cured and hardened, the abutment joint is formed.

[0021] Compared with the prior art, the technical scheme of the application has the following beneficial effects:

[0022] 1. Reducing the local tensile stress of concrete: through the change of the construction sequence, the weight of the concrete deck slab can be completely borne by the steel beam, thereby reducing the negative bending moment of the concrete abutment and improving the local tensile stress condition of the concrete.

[0023] 2. The steel-concrete joint has enhanced rigidity and clear stress, the pressure plate functions as a stiffener to avoid the compression instability of the end of the embedded segment of the steel beam, the double-row T-shaped opening plate on the upper flange plate and the double web inside the abutment can form a couple to improve the bending resistance of the joint, and the pressure plate of the upper and lower flange plates and the web of the extension segment can improve the shear resistance of the joint.

[0024] 3. The construction efficiency is improved, the U-shaped opening is formed in the web of the end of the embedded segment of the steel beam, and the slotted round holes are formed around the U-shaped opening, and the holes of the opening plate are set as slotted round holes, so that the reinforcement inside the abutment can be conveniently penetrated and constructed.

[0025] 4. The economic benefit is improved, the specific components are arranged in the joint to bear the corresponding forces, so that the joint has clear stress and simple and beautiful structure, the amount of steel is reduced, and the steel beam can be pre-processed in the factory, thereby saving the on-site welding step. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a schematic view of the joint structure according to the embodiment.

[0027] Figure 2 is a front view of the joint structure according to the embodiment.

[0028] Figure 3 is a side view of the joint structure according to the embodiment.

[0029] Figure 4 is a schematic view of the steel beam structure according to the embodiment.

[0030] Figure 5 is a top view of the steel beam structure according to the embodiment. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application; obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0032] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom end" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mount", "provided with", "sleeved / connected", "connected" and the like should be understood broadly, for example, "connected" can be wall-mounted connection, can also be detachable connection, or integrally connected, can be mechanical connection, can also be electrical connection, can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication of two elements, and those skilled in the art can understand the specific meaning of the above terms in the present application according to the specific circumstances.

[0034] Please refer to Figures 1 to 5 A kind of slot hole web plate composite beam and concrete abutment node, it includes concrete abutment 1 and steel beam, concrete abutment 1 includes lower first pouring section 2 and upper post-cast section 3, steel beam includes steel beam overhanging section 5 and steel beam embedded section 6.The steel beam embedded section 6 and steel beam support 7 are embedded in the concrete abutment 1, steel beam embedded section 6 adopts profile steel, including first upper flange 8, first lower flange 9 and the C-shaped double web 12 of connecting (specifically welding) first upper flange 8, first lower flange 9, the C-shaped double web 12 is perpendicular to first upper flange 8, first lower flange 9 and is arranged along transverse symmetry;The steel beam overhanging section 5 adopts profile steel, including second upper flange 8, second lower flange 9 and the web 10 of connecting (specifically welding) second upper flange 8, second lower flange 9, the web 10 is perpendicular to second upper flange 8, second lower flange 9 and is located on the longitudinal symmetry center plane of second upper flange 8, second lower flange 9, and the second upper flange 8, second lower flange 9 and web 10 constitute the H-shaped steel structure of the section of "H".

[0035] The C-shaped double web 12 is embedded in the concrete abutment 1, and the C-shaped double web 12 has a C-shaped opening at one end to facilitate the flow of concrete, and a slot hole 13 is formed around the C-shaped opening to facilitate the penetration of steel bars 14.

[0036] The steel beam support 7 includes support trapezoidal plate 19, support bottom plate 20 and support web 20. Elliptical hole plate is opened in the middle of support web 20 to facilitate the flow of concrete. In addition to increasing the stability of the steel beam as a whole, the steel beam support 7 can also improve the shear capacity and pressure bearing capacity of the steel beam.

[0037] The steel beam overhanging section 5 is provided with a plurality of stiffening ribs 11 connected (specifically welded) to the upper flange 8, the lower flange 9 and the web 10 and perpendicular to the web 10.

[0038] Two rows of T-shaped slot hole connectors 16 perpendicular to the upper flange 8 are provided on the upper flange 8, which can form a pair of force couples with the C-shaped double web 12 to improve the bending capacity of the beam abutment node, and slot hole plate flanges 18 are provided at some positions of the T-shaped slot hole connectors 16 to improve the uplift resistance of the beam abutment node.

[0039] The embodiment also provides a construction method of the slot hole web plate composite beam and the concrete abutment joint as described above, comprising the following steps:

[0040] 1) Composite beam processing: in a steel structure processing plant, the first upper flange plate 8, the first lower flange plate 9, the C-shaped double web plate 12 and the steel beam support 7 are connected into the steel beam embedded section 6 through automatic welding; the second upper flange plate 8, the second lower flange plate 9, the second web plate 10 and the stiffening rib 11 are connected into the steel beam overhanging section 5; the T-shaped slot hole connector 16 is welded above the steel beam flange plate 8; and the concrete deck slab 4 above the steel beam overhanging section 5 is poured.

[0041] 2) Construction of the lower part of the abutment: after the bridge foundation is completed, the lower part of the abutment 2 below the steel beam embedded section 6 is poured and cured to form a shape.

[0042] 3) Composite beam hoisting construction: the composite beam is hoisted to the upper part of the concrete abutment lower part 2, and is in a simply supported state after hoisting in place under the support action of the steel beam support 7, and the weight of the concrete deck slab 4 is completely borne by the steel beam.

[0043] 4) Construction of the upper part of the abutment: the slot hole 13 of the steel beam embedded section 6, the penetrating steel bar 14 of the T-shaped slot hole connector 16 of the steel beam upper flange plate 8, and other ordinary steel bars are installed to form a steel cage, and then the concrete abutment upper part 3 is poured, and the abutment joint is formed after the concrete is cured and hardened.

[0044] The slot hole web plate composite beam and the concrete abutment joint can reduce the local tensile stress of the concrete, enhance the stiffness of the steel-concrete joint, improve the efficiency of the on-site construction, and improve the economy. Since no welding studs are arranged, the structure of the joint is not too complex, and the construction of the abutment steel bars and the pouring quality of the concrete are not affected.

[0045] The above description is only the preferred embodiment of the present application, but the design concept of the present application is not limited to this. Any skilled person in the art can make non-essential changes to the present application within the technical scope disclosed in the present application, and such changes shall be deemed to fall within the scope of protection of the present application.

Claims

1. A construction method of a groove type hole web composite beam and concrete abutment joint, characterized in that: The trough hole web plate composite beam and concrete abutment joint comprises a concrete abutment and a steel beam, the embedded section of the steel beam is cast in the concrete abutment; the embedded section of the steel beam adopts a profile steel, comprising a first upper flange plate, a first lower flange plate, a first web plate connecting the first upper flange plate and the first lower flange plate and a steel beam support; the overhanging section of the steel beam adopts a profile steel, comprising a second upper flange plate, a second lower flange plate and a second web plate connecting the second upper flange plate and the second lower flange plate; the first web plate is composed of two C-shaped web plates, the C-shaped web plates are provided with C-shaped openings for concrete flow; the C-shaped web plates are provided with a plurality of trough holes around the C-shaped web plates for passing steel bars; the steel beam support comprises a support bottom plate, a support web plate and a support trapezoidal plate; the support trapezoidal plate is two, the support web plate is connected between the two support trapezoidal plates, the support bottom plate is connected at the bottom of the two support trapezoidal plates and is perpendicular to the support web plate; the support web plate is provided with an elliptical hole for concrete flow; the first upper flange plate is provided with two rows of T-shaped groove hole connectors perpendicular to the first upper flange plate; comprising the steps of: 1) composite beam processing and manufacturing: in a steel structure processing plant, the first upper flange plate, the first lower flange plate, the first web plate and the steel beam support are connected into the embedded section of the steel beam through automatic welding; the second upper flange plate, the second lower flange plate, the second web plate and the stiffening rib are connected into the overhanging section of the steel beam; the T-shaped groove hole connectors are welded above the first upper flange plate; the concrete deck slab above the overhanging section of the steel beam is poured; 2) abutment lower part first pouring section construction: after the bridge foundation is completed, the abutment lower part first pouring section below the steel beam is poured and cured to form a shape; 3) composite beam hoisting construction: the composite beam is hoisted to above the abutment lower part first pouring section, and is in a simply supported state after hoisting in place under the support action of the steel beam support, and the weight of the concrete deck slab is completely borne by the steel beam; 4) abutment upper part post-pouring section construction: the penetrating steel bars of the steel beam embedded section trough hole and the T-shaped groove hole connectors of the first upper flange plate of the steel beam are installed, other ordinary steel bars are erected to form a steel bar cage, and then the concrete abutment upper part post-pouring section is poured, and the abutment joint is formed after the concrete is cured and hardened.

2. The construction method of a groove hole web composite beam and concrete abutment joint according to claim 1, characterized in that: The concrete abutment comprises a lower part first pouring section and an upper part post-pouring section.

3. The construction method of a groove hole web composite beam and concrete abutment joint according to claim 1, characterized in that: The steel beam is provided with a plurality of stiffening ribs connecting the first upper flange plate, the first lower flange plate and the first web plate and being perpendicular to the first web plate.

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