Steel-concrete combined simply supported beam bridge deck continuous structure

Abstract

The utility model discloses a steel-concrete combined simply supported beam bridge deck continuous structure which comprises a bridge deck continuous cast-in-place telescopic section and two bridge deck continuous cast-in-place fixed sections which are arranged between a first steel main beam and a second steel main beam, and the bridge deck continuous cast-in-place telescopic section is arranged between the two bridge deck continuous cast-in-place fixed sections. The thickness of the side, close to the bridge deck continuous cast-in-place telescopic section, of the bridge deck continuous cast-in-place fixed section is larger than that of the other side, and the thickness of the bridge deck continuous cast-in-place telescopic section is larger than that of the side, away from the bridge deck continuous cast-in-place telescopic section, of the bridge deck continuous cast-in-place fixed section. A fixing plate is placed at the position, at the joint of the first steel main beam and the second steel main beam, of the bridge deck continuous cast-in-place telescopic section, a base plate is arranged below the fixing plate, and steel bar frames are arranged in the bridge deck continuous cast-in-place telescopic section and the bridge deck continuous cast-in-place fixing section. Compared with the prior art, the connecting structure is simple in structure, clear in stress, very convenient and fast to mount and dismount, and capable of well adapting to deformation between the steel girders.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge engineering, in particular to a continuous structure of a steel-concrete combined simply supported beam bridge deck. Background Art

[0002] The continuous construction of traditional steel-concrete composite beam bridge decks requires on-site steel bar binding, pouring, and maintenance, which is complex and requires high construction technology, and the construction quality is difficult to guarantee. The existing simply supported steel-concrete composite beam cast-in-place bridge deck continuous structure is prone to problems such as weakening of longitudinal and transverse rigidity at the end beams because only steel beams are used. At the same time, cracking is prone to occur during operation. Utility Model Content

[0003] The utility model provides a continuous structure of a steel-concrete composite simply supported beam bridge deck. By hoisting pre-fabricated steel bars, the construction convenience of the continuous structure of the steel-concrete composite simply supported beam bridge deck can be effectively improved, the construction efficiency can be improved, and the construction intensity can be reduced. Secondly, the bridge deck is thickened, the lateral stiffness at the end cross beams is enhanced, and fixed plates and foam plates are arranged to adapt to the deformation between the steel main beams, thereby effectively avoiding cracking.

[0004] The utility model provides a continuous structure of a steel-concrete composite simply supported beam bridge deck, comprising a continuous cast-in-place expansion section of the bridge deck and two continuous cast-in-place fixed sections of the bridge deck arranged between a first steel main beam and a second steel main beam, wherein the continuous cast-in-place expansion section of the bridge deck is arranged between the two continuous cast-in-place fixed sections of the bridge deck, the thickness of the continuous cast-in-place fixed section of the bridge deck close to the continuous cast-in-place expansion section is greater than the thickness of the other side, the thickness of the continuous cast-in-place expansion section of the bridge deck is greater than the thickness of the continuous cast-in-place fixed section of the bridge deck away from the continuous cast-in-place expansion section of the bridge deck, a fixing plate is placed at the joint of the first steel main beam and the second steel main beam of the bridge deck, a pad is arranged under the fixing plate, and steel bars are arranged in the continuous cast-in-place expansion section of the bridge deck and the continuous cast-in-place fixed section of the bridge deck.

[0005] Preferably, a slope is provided at the bottom of the side of the bridge deck continuously cast-in-place fixed section away from the bridge deck continuously cast-in-place expansion section, and the slope is lower at the end close to the bridge deck continuously cast-in-place expansion section.

[0006] Preferably, U-shaped steel bars are preset in the continuous cast-in-place fixed section of the bridge deck, and the U-shaped steel bars are arranged above the inclined surface.

[0007] Preferably, it also includes bolts, which are fixed on the first steel main beam and the second steel main beam.

[0008] Preferably, the steel frame includes transverse steel bars and longitudinal steel bars, the transverse steel bars and the longitudinal steel bars are fixedly connected, the longitudinal steel bars include top longitudinal skeleton steel bars and bottom steel bars arranged below the top longitudinal skeleton steel bars, and the top longitudinal skeleton steel bars are arranged in a ring shape.

[0009] Preferably, the top longitudinal skeleton reinforcement is provided with a sleeve at the continuous cast-in-place expansion section of the bridge deck.

[0010] Preferably, the top longitudinal skeleton steel bars are fixedly connected to the U-shaped steel bars, and a ring structure is formed between the top longitudinal skeleton steel bars and the U-shaped steel bars.

[0011] Preferably, the transverse steel bars are divided into three layers, one of which is connected to the bottom steel bars, and the other two layers are respectively fixed to the upper and lower ends of the top longitudinal skeleton steel bars.

[0012] Preferably, a steel mesh is provided at the upper end of the top longitudinal skeleton reinforcement at the continuous cast-in-place expansion section of the bridge deck.

[0013] Preferably, the joint between the continuous cast-in-place expansion section of the bridge deck and the continuous cast-in-place fixed section of the bridge deck is filled with rubber.

[0014] Compared with the prior art, the utility model is easy to operate. The prefabricated steel bar frame only needs to be hoisted and placed in the slot for concrete pouring. It can effectively improve the construction convenience of the continuous structure of the steel-concrete composite simply supported beam bridge deck, improve the construction efficiency, and reduce the construction intensity. The continuous cast-in-place expansion section of the bridge deck and the continuous cast-in-place fixed section of the bridge deck are thickened to enhance the lateral stiffness at the end cross beam; by setting the fixed plate and the foam plate, it can effectively adapt to the deformation between the steel main beams, and further meet the demand for end stress release. The continuous structure of the bridge deck of the utility model has a simple structure, clear force, and is very convenient to install and disassemble. It is green and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 It is a partial structural schematic diagram of the utility model;

[0018] Figure 3 It is the front view of the utility model.

[0019] Reference numerals:

[0020] 1. The first steel main beam, 2. The second steel main beam, 3. The continuous cast-in-place expansion section of the bridge deck, 4. The continuous cast-in-place fixed section of the bridge deck, 5. The precast bridge deck, 6. The fixed plate, 7. The pad, 8. The steel bar frame, 9. The U-shaped steel bar, 81. The transverse steel bar, 82. The longitudinal steel bar, 821. The top longitudinal skeleton steel bar, 822. The bottom steel bar, 100. The inclined plane, 200. The studs, 300. The casing, 400. The rubber. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See attached Figure 1-2 The utility model provides a continuous structure of a steel-concrete composite simply supported beam bridge deck, comprising a continuous cast-in-place expansion section 3 of the bridge deck and two continuous cast-in-place fixed sections 4 of the bridge deck arranged between a first steel main beam 1 and a second steel main beam 2, the continuous cast-in-place expansion section 3 of the bridge deck being arranged between the two continuous cast-in-place fixed sections 4 of the bridge deck, the thickness of the continuous cast-in-place fixed section 4 of the bridge deck close to the continuous cast-in-place expansion section 3 of the bridge deck being greater than the thickness on the other side, the thickness of the continuous cast-in-place expansion section 3 of the bridge deck being greater than the thickness of the continuous cast-in-place fixed section 4 of the bridge deck away from the continuous cast-in-place expansion section 3 of the bridge deck, the continuous cast-in-place expansion section 3 of the bridge deck and the continuous cast-in-place fixed section 4 of the bridge deck being thickened, and compared with the traditional continuous structure of the bridge deck, the lateral stiffness is greatly improved, and the overall performance of the composite beam bridge is improved. A fixed plate 6 is placed at the joint of the first steel main beam 1 and the second steel main beam 2 of the bridge deck continuous cast-in-place expansion section 3, and a pad 7 is provided under the fixed plate 6. Specifically, the fixed plate 6 is a steel plate, and the pad 7 is a foam plate. The foam plate under the steel plate can effectively adapt to the deformation between the steel main beams. A steel frame 8 is provided in the bridge deck continuous cast-in-place expansion section 3 and the bridge deck continuous cast-in-place fixed section 4.

[0023] An inclined surface 100 is provided at the bottom of the bridge deck continuously cast-in-place fixed section 4 on the side away from the bridge deck continuously cast-in-place expansion section 3 , and the inclined surface 100 is lower at one end close to the bridge deck continuously cast-in-place expansion section 3 .

[0024] See attached Figure 3The bridge deck continuous cast-in-place fixed section 4 is preset with a U-shaped steel bar 9, which is arranged above the inclined surface 100. A prefabricated bridge deck 5 is arranged outside the bridge deck continuous cast-in-place fixed section 4, and the steel bars inside the prefabricated bridge deck 5 will extend into the bridge deck continuous cast-in-place fixed section 4 to form a U-shaped steel bar 9 during the manufacturing process.

[0025] The present embodiment further includes a stud 200 , which is fixed to the first steel main beam 1 and the second steel main beam 2 by welding.

[0026] The steel bar frame 8 includes transverse steel bars 81 and longitudinal steel bars 82, which are fixedly connected. The longitudinal steel bars 82 include top longitudinal skeleton steel bars 821 and bottom steel bars 822 arranged below the top longitudinal skeleton steel bars 821, and the top longitudinal skeleton steel bars 821 are arranged in a ring shape. The steel bar frame 8 is first tied and fixed in advance, and then hoisted into place as a whole.

[0027] The top longitudinal skeleton reinforcement 821 is provided with a sleeve 300 at the continuous cast-in-place expansion section 3 of the bridge deck. Specifically, the sleeve 300 is made of epoxy phenol paint, glass fiber cloth and polyethylene tape.

[0028] The top longitudinal skeleton reinforcement 821 is fixedly connected to the U-shaped reinforcement 9 , and a ring structure is formed between the top longitudinal skeleton reinforcement 821 and the U-shaped reinforcement 9 .

[0029] The transverse reinforcement 81 is divided into three layers, one of which is fixedly connected to the bottom reinforcement 822 , and the other two layers are respectively fixed to the upper and lower ends of the top longitudinal skeleton reinforcement 821 .

[0030] A steel mesh is provided at the upper end of the top longitudinal skeleton reinforcement 821 at the continuous cast-in-place expansion section 3 of the bridge deck. The steel mesh is composed of plain round steel bars, which are tied into a steel mesh and installed above the top longitudinal skeleton reinforcement 821, and then the continuous integral structure of the bridge deck is formed by pouring concrete.

[0031] The joint between the continuous cast-in-place expansion section 3 and the continuous cast-in-place fixed section 4 of the bridge deck is a separation joint, and the separation joint is filled with rubber 400. This arrangement allows the stress in the bridge deck to be largely released at the separation joint when the joint position of the first steel main beam 1 and the second steel main beam 2 is subjected to longitudinal excitation force or warping deformation, and the bridge deck and the steel main beam can maintain a good stress state, while also ensuring free expansion and contraction deformation between the first steel main beam 1 and the second steel main beam 2.

[0032] The upper end of the stud 200 extends into the top longitudinal skeleton reinforcement 821. Specifically, the stud 200 is divided into a common stud and a one-way non-shear stud. The common stud is distributed in the continuous cast-in-place fixed section 4 of the bridge deck, and the one-way non-shear stud is distributed in the continuous cast-in-place expansion section 3 of the bridge deck.

[0033] The cross section of the pad 7 gradually decreases from top to bottom, and a V-shaped placement groove is formed between the first steel main beam 1 and the second steel main beam 2, and the pad 7 is installed in the V-shaped placement groove.

[0034] The utility model provides a construction process of a continuous structure of a steel-concrete composite simply supported beam bridge deck:

[0035] The first step is to hoist the prefabricated steel main beam and prefabricated bridge deck 5 in the factory into a whole span.

[0036] The second step is to weld ordinary studs and one-way non-shear studs on site at the main beam flange plate of the steel main beam.

[0037] The third step is to lay steel plates and foam plates on the flanges of the steel main beams, make a steel frame 8 and install sleeves 300 on the top longitudinal skeleton steel bars 821, and install the steel frame 8 in place by hoisting.

[0038] The fourth step is to weld and fix the U-shaped steel bar 9 and the top longitudinal skeleton steel bar 821, install the steel mesh above the steel bar frame 8, and install the rubber 400 in the separation seam.

[0039] The fifth step is to pour concrete to complete the continuous structure of the bridge deck.

[0040] The utility model is easy to operate. The prefabricated steel bar frame 8 only needs to be hoisted and placed in the slot for concrete casting. It can effectively improve the construction convenience of the continuous structure of the steel-concrete composite simply supported beam bridge deck, improve the construction efficiency, and reduce the construction intensity. The continuous cast-in-place expansion section 3 of the bridge deck and the continuous cast-in-place fixed section 4 of the bridge deck are thickened to enhance the lateral stiffness at the end cross beam. Through the comprehensive utilization of the separation seam, the sleeve 300 and the bolt 200, the requirements of the free expansion and contraction deformation of the longitudinal bridge to the main beam and the stress release of the end are further met. The continuous structure of the bridge deck of the utility model has a simple structure, clear force, and is very convenient to install and disassemble. It is green and environmentally friendly.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A continuous steel-concrete composite simply supported beam bridge deck structure, characterized in that: It includes a bridge deck continuous cast-in-place expansion section and two bridge deck continuous cast-in-place fixed sections arranged between a first steel main beam and a second steel main beam, the bridge deck continuous cast-in-place expansion section is arranged between the two bridge deck continuous cast-in-place fixed sections, the thickness of the bridge deck continuous cast-in-place fixed section close to the bridge deck continuous cast-in-place expansion section is greater than the thickness on the other side, the thickness of the bridge deck continuous cast-in-place expansion section is greater than the thickness of the bridge deck continuous cast-in-place fixed section away from the bridge deck continuous cast-in-place expansion section, a fixing plate is placed at the joint of the first steel main beam and the second steel main beam of the bridge deck continuous cast-in-place expansion section, a pad is arranged under the fixing plate, and steel bars are arranged in the bridge deck continuous cast-in-place expansion section and the bridge deck continuous cast-in-place fixed section.

2. The continuous steel-concrete composite simply supported beam bridge deck structure according to claim 1 is characterized in that: A slope is provided at the bottom of the bridge deck continuously cast-in-place fixed section on one side away from the bridge deck continuously cast-in-place expansion section, and the slope is lower at one end close to the bridge deck continuously cast-in-place expansion section.

3. The continuous structure of steel-concrete composite simply supported beam bridge deck according to claim 2 is characterized in that: U-shaped steel bars are preset in the continuous cast-in-place fixed section of the bridge deck, and the U-shaped steel bars are arranged above the inclined surface.

4. The continuous steel-concrete composite simply supported beam bridge deck structure according to claim 3 is characterized in that: Also included are pegs fixed to the first steel main beam and the second steel main beam.

5. The continuous structure of steel-concrete composite simply supported beam bridge deck according to claim 4 is characterized in that: The steel bar frame includes transverse steel bars and longitudinal steel bars, the transverse steel bars and the longitudinal steel bars are fixedly connected, the longitudinal steel bars include top longitudinal skeleton steel bars and bottom steel bars arranged below the top longitudinal skeleton steel bars, and the top longitudinal skeleton steel bars are arranged in a ring shape.

6. The continuous steel-concrete composite simply supported beam bridge deck structure according to claim 5, characterized in that: The top longitudinal skeleton reinforcement is provided with a sleeve at the continuous cast-in-place expansion section of the bridge deck.

7. The continuous steel-concrete composite simply supported beam bridge deck structure according to claim 6 is characterized in that: The top longitudinal skeleton steel bars are fixedly connected to the U-shaped steel bars, and a ring structure is formed between the top longitudinal skeleton steel bars and the U-shaped steel bars.

8. The continuous steel-concrete composite simply supported beam bridge deck structure according to claim 7 is characterized in that: The transverse steel bars are divided into three layers, one of which is connected to the bottom steel bars, and the other two are respectively fixed to the upper end and the lower end of the top longitudinal skeleton steel bars.

9. The continuous steel-concrete composite simply supported beam bridge deck structure according to claim 5, characterized in that: A steel mesh is provided at the upper end of the top longitudinal skeleton steel bars at the continuous cast-in-place expansion section of the bridge deck.

10. The continuous steel-concrete composite simply supported beam bridge deck structure according to claim 1, characterized in that: The joint between the bridge deck continuous cast-in-place expansion section and the bridge deck continuous cast-in-place fixed section is filled with rubber.

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