A trough-shaped steel plate double-combined beam bridge and construction steps

Abstract

The present invention discloses a trough-shaped steel plate double-combined girder bridge and construction steps, including a web, a combined upper flange, a steel plate lower flange, a combined bridge deck, an energy-dissipating anti-collision beam, and a column; the web is located between the combined upper flange and the steel plate lower flange and is integrally connected to both by welding. A combined bridge deck is provided at the bottom of two webs to form a trough-shaped structure; an energy-dissipating anti-collision beam is provided on the inner wall of the web, and a column is provided on the outer wall. The present invention has an energy-dissipating cross beam and each component is constructed according to certain steps, ensuring that when a vehicle impacts, the structural web is not damaged and only the cross beam is damaged, and the damaged cross beam can be replaced. The structural system of the present invention has high stress efficiency and at the same time avoids the disadvantages of the traditional trough-shaped beam structure.

Description

Technical Field:

[0001] The present invention relates to the field of bridge design and construction, and particularly to a trough-shaped steel plate double-combined beam bridge. Background Art:

[0002] The trough-shaped beam is a bridge form proposed to reduce the height from the bridge deck to the bottom of the beam, thereby increasing the clearance under the bridge. Its advantages are: (1) low construction height, most suitable for overpass bridges and overline bridges, and can reduce the earthwork volume of the road embankments at both ends while meeting the requirements of the clearance under the bridge; (2) the web of the trough-shaped beam also serves as an anti-collision guardrail, with a simple structure and material consumption savings.

[0003] Currently, trough-shaped beams are mainly used in rail transit, and are also applied in pedestrian bridges, but are rarely used in highway vehicle bridges. Currently, trough-shaped beams have the following disadvantages:

[0004] (1) Since the web, which is the main beam stress structure, also serves as an anti-collision guardrail, when the bridge faces vehicle impacts during operation, the web structure is damaged, leading to extremely difficult bridge collapse or repair.

[0005] (2) To prevent vehicle impact problems, additional anti-collision guardrails can be installed, but this reduces the driving clearance width of the bridge deck, increases the material consumption, and reduces the economy.

[0006] (3) Although the concrete trough-shaped beam has a high torsional stiffness, its self-weight is large, the stress efficiency is low, and it is not convenient for transportation and hoisting; at the same time, the corners where the concrete bottom plate and the web meet are prone to cracking.

[0007] (4) Due to low torsional stiffness, easy instability of local plate members, and easy fatigue of the steel bridge deck, the pure steel structure trough-shaped beam cannot be actually applied. Summary of the Invention:

[0008] The present invention is to solve the deficiencies of the above-mentioned existing technologies, and provides a trough-shaped steel plate double-combined beam bridge.

[0009] To achieve the above purposes, the present invention is realized through the following technical solutions:

[0010] A trough-shaped steel plate double-combined beam bridge includes a web, a combined upper flange, a steel plate lower flange, a combined bridge deck, an energy-dissipating anti-collision beam, and columns;

[0011] The web is located between the combined upper flange and the steel plate lower flange, and is connected to both by welding to form an integral body. A combined bridge deck is provided at the bottom of the two webs to form a trough-shaped structure;

[0012] An energy-dissipating anti-collision beam is provided on the inner wall of the web, and columns are provided on the outer wall.

[0013] The further technology of the present invention:

[0014] Preferably, the column has an open U-shaped cross-section, is welded to the combined upper flange at the top, is welded to the steel plate lower flange at the bottom, and the rib wall is welded to the web, and is arranged at a certain interval longitudinally.

[0015] Preferably, the combined upper flange is composed of a closed steel pipe and core-filled concrete. The closed steel pipe is welded to the top of the web, and the core-filled concrete is filled in the closed steel pipe.

[0016] Preferably, the composite bridge deck includes a corrugated steel plate and a cast-in-place bridge deck. Both ends of the corrugated steel plate are connected to the web by welding, and the cast-in-place bridge deck is a reinforced concrete bridge deck.

[0017] Preferably, the energy-dissipating anti-collision beam includes a U-shaped longitudinal rib and friction bolts. The U-shaped longitudinal rib is a U-shaped rib with feet, and holes are arranged at a certain interval on the feet. The friction bolts are inserted, and holes are arranged on the web corresponding to the friction bolts. The friction bolts connect the U-shaped longitudinal rib and the web into a whole.

[0018] Furthermore, the cross-sectional shape of the cast-in-place bridge deck is concave. The bottom of the concave is connected to the corrugated steel plate by shear studs, and the outer side wall of the concave is connected to the web by shear studs.

[0019] Furthermore, the holes on the feet of the U-shaped longitudinal rib are transverse long holes, and the corresponding holes on the web are vertical long holes.

[0020] Furthermore, the friction bolt includes a screw rod, a nut and an energy-dissipating gasket. The energy-dissipating gasket is a metal with an elastic modulus lower than that of the web.

[0021] Furthermore, the U-shaped longitudinal rib is a metal with an elastic modulus lower than that of the web and the column.

[0022] Furthermore, the distance from the inner side wall of the concave of the cast-in-place bridge deck to the center line of the bridge deck < the distance from the inner side wall of the U-shaped longitudinal rib to the center line of the bridge deck < the distance from the inner side wall of the combined upper flange to the center line of the bridge deck.

[0023] The construction steps of a trough-shaped steel plate double-combined beam bridge of the present invention are carried out according to the following steps:

[0024] Step 1: Process the web, closed steel pipe, steel plate lower flange, corrugated steel plate, U-shaped longitudinal rib, and column in the factory. And assemble the web, closed steel pipe, steel plate lower flange, U-shaped longitudinal rib, and column into a beam segment that meets the transportation requirements.

[0025] Step 2: Transport the beam segment to the construction site, carry out beam segment assembly, and weld the corrugated steel plate to the web, and weld shear studs at the positions of the corrugated steel plate and the web corresponding to the cast-in-place bridge deck.

[0026] Step 3: Hoist the steel beam as a whole to the bridge position, pour the bridge deck, and carry out bridge deck paving.

[0027] Step 4: Pour core concrete into the closed steel pipe.

[0028] Step 5: Install the energy-dissipating anti-collision beam.

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0030] 1. By setting up the columns, the out-of-plane bending capacity of the web is improved; combined with the setting of the composite upper flange, the overall torsional resistance of the structure is enhanced.

[0031] 2. The energy-dissipating anti-collision beam is arranged inside the web, increasing the driving space on the bridge deck, reducing the structural width, and saving costs.

[0032] 3. Through the setting of longitudinal and transverse bolt long holes, when the vehicle impacts, the U-shaped longitudinal rib can move longitudinally and deform vertically to dissipate the impact energy of the vehicle. Through the energy-dissipating gasket of the friction bolt, when the U-shaped longitudinal rib moves and deforms, the impact energy of the vehicle is dissipated through the friction of the energy-dissipating gasket.

[0033] 4. By setting up the columns, and through the setting of the energy-dissipating anti-collision beam and the elastic modulus of the material of the U-shaped longitudinal rib being lower than that of the web, it is ensured that when the vehicle impacts, only the U-shaped longitudinal rib is damaged without damaging the structural web. The damaged U-shaped longitudinal rib can be replaced by removing the friction bolts.

[0034] 5. By using the corrugated plate, a crossbeam system is formed at the trough of the bridge deck, facilitating construction and ensuring the force safety of the bridge deck; and solving the fatigue problem of the steel structure bridge deck and the cracking problem of the concrete bottom plate.

[0035] 6. By setting the distances of the inner sidewalls of the concave shape of the cast-in-place bridge deck, the inner sidewalls of the U-shaped longitudinal ribs, and the inner sidewalls of the composite upper flange from the center line of the bridge deck respectively; when the vehicle impacts, the wheels contact the inner sidewall of the concave shape of the cast-in-place bridge deck, and the front of the vehicle contacts the inner sidewall of the U-shaped longitudinal rib, so that the impact part cannot contact the upper flange of the composite beam.

[0036] 7. Through specific construction steps, the energy-dissipating anti-collision beam does not bear any dead load, ensuring that the replacement of the energy-dissipating anti-collision beam does not change the structural force system.

[0037] 8. Through the combination of concrete and closed steel pipe, and the combination of corrugated steel plate and cast-in-place bridge deck, the local stability problem of the steel structure is solved, and the force efficiency is improved. Description of the Drawings:

[0038] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings;

[0039] Figure 1 It is the overall sectional view of the present invention;

[0040] Figure 2 It is Figure 1 the schematic view of a-a in

[0041] Figure 3 It is Figure 1 the schematic view of b-b in

[0042] Figure 4 It is Figure 1 the large scale drawing of A in

[0043] Figure 5 It is the three-dimensional schematic view of the present invention.

[0044] Wherein: 1 web; 1-1 vertical long hole; 2 composite upper flange; 2-1 closed steel pipe; 2-2 infilled concrete; 3 steel plate lower flange; 4 composite bridge deck; 4-1 corrugated steel plate; 4-2 cast-in-place bridge deck; 4-3 shear stud; 5 energy-dissipating anti-collision beam; 5-1 U-shaped longitudinal rib; 5-2 friction bolt; 5-3 energy-dissipating gasket; 6 column. Specific embodiments:

[0045] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further clarified below with specific embodiments.

[0046] Such as Figures 1-5 , a trough-shaped steel plate double-combined beam bridge, including a web 1, a composite upper flange 2, a steel plate lower flange 3, a composite bridge deck 4, an energy-dissipating anti-collision beam 5, and a column 6;

[0047] The web 1 is located between the composite upper flange 2 and the steel plate lower flange 3, and is integrally connected to both by welding. A composite bridge deck 4 is provided at the bottom of the two webs 1 to form a trough-shaped structure;

[0048] An energy-dissipating anti-collision beam 5 is provided on the inner wall of the web 1, and a column 6 is provided on the outer wall.

[0049] The column 6 has an open U-shaped cross-section, is welded to the composite upper flange 2 at the top, is welded to the steel plate lower flange 3 at the bottom, and the rib wall is welded to the web 1 and is arranged at a certain interval longitudinally.

[0050] The combined upper flange 2 is composed of a closed steel pipe 2-2 and infilled concrete 2-1. The top of the web 1 is welded to the closed steel pipe 2-2, and the infilled concrete 2-1 is filled inside the closed steel pipe 2-2.

[0051] The combined bridge deck 4 includes a corrugated steel plate 4-1 and a cast-in-place bridge deck 4-2. The specifications and dimensions of the corrugated steel plate 4-1 meet the requirements of "Corrugated Steel Webs for Composite Structure Bridges" JT / T 784-2010. Both ends of the corrugated steel plate 4-1 are connected to the web 1 by welding.

[0052] The cross-sectional shape of the cast-in-place bridge deck 4-2 is concave. The bottom of the concave is connected to the corrugated steel plate 4-1 by shear studs 4-3, and the outer sidewall of the concave is connected to the web 1 by shear studs 4-3.

[0053] The energy-dissipating anti-collision beam 5 includes a U-shaped longitudinal rib 5-1. The U-shaped longitudinal rib 5-1 is a U-shaped longitudinal rib with feet, made of aluminum alloy. Transverse long holes 5-4 are provided on the feet. Friction bolts 5-2 are inserted into the transverse long holes 5-4. At the position of the web 1 corresponding to the friction bolts 5-2, vertical long holes 1-1 are opened. The friction bolts 5-2 pass through the transverse long holes 5-4 and the vertical long holes 1-1 and are connected to the web.

[0054] In this embodiment, energy-dissipating washers 5-3 are provided on the friction bolts 5-2.

[0055] In this embodiment, the distance L1 from the inner sidewall of the concave of the cast-in-place bridge deck 4-2 to the center line of the bridge deck < the distance L2 from the inner sidewall of the U-shaped longitudinal rib 5-1 to the center line of the bridge deck < the distance L3 from the inner sidewall of the combined upper flange 2 to the center line of the bridge deck.

[0056] The construction steps are as follows:

[0057] 1. Process the web 1, combined upper flange 2, steel plate lower flange 3, corrugated steel plate 4-1, U-shaped longitudinal rib 5-1, and column 6 in the factory. And assemble the web 1, combined upper flange 2, steel plate lower flange 3, and column 6 into beam segments.

[0058] 2. Transport the beam segments to the construction site, carry out beam segment assembly, and weld and connect the corrugated steel plate 4-1 and the web 1.

[0059] 3. Hoist the steel beam as a whole to the bridge position, weld the shear studs 4-3, pour the cast-in-place bridge deck 4-2, and carry out bridge deck paving.

[0060] 4. Pour the infilled concrete 2-1 into the closed steel pipe 2-2.

[0061] 5. Install the energy-dissipating anti-collision beam 5.

[0062] The basic principles, main features and characteristics of the present invention have been shown and described above. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A trough-shaped steel plate double-combined beam bridge, characterized in that: It includes a web (1), a composite upper flange (2), a steel plate lower flange (3), a composite bridge deck (4), an energy-dissipating anti-collision beam (5), and a column (6); The web (1) is located between the composite upper flange (2) and the steel plate lower flange (3), and is connected to both of them by welding to form an integral whole. A composite bridge deck (4) is provided at the bottom of the two webs (1) to form a trough-shaped structure; An energy-dissipating anti-collision beam (5) is provided on the inner wall of the web (1), and a column (6) is provided on the outer wall; The composite bridge deck (4) includes a corrugated steel plate (4-1) and a cast-in-place bridge deck (4-2). Both ends of the corrugated steel plate (4-1) are connected to the web (1) by welding. The cast-in-place bridge deck (4-2) is a reinforced concrete bridge deck, and its cross-sectional shape is concave. The bottom of the concave is connected to the corrugated steel plate (4-1) by shear studs (4-3), and the outer side wall of the concave is connected to the web (1) by shear studs (4-3); The energy-dissipating anti-collision beam (5) includes a U-shaped longitudinal rib (5-1) and a friction bolt (5-2). The U-shaped longitudinal rib (5-1) is a U-shaped rib with feet, and holes are provided at certain intervals on the feet. The friction bolt (5-2) is inserted, and a vertical long hole (1-1) is provided on the web (1) corresponding to the friction bolt. The friction bolt (5-2) connects the U-shaped longitudinal rib (5-1) and the web (1) into an integral whole.

2. The double-combined girder bridge of a channel steel plate according to claim 1, wherein: The column (6) has an open U-shaped cross-section, is welded to the composite upper flange (2) at the top, is welded to the steel plate lower flange (3) at the bottom, and the rib wall is welded to the web (1), and is arranged at certain intervals longitudinally.

3. The double-combined girder bridge of a channel steel plate according to claim 1, wherein: The composite upper flange (2) is composed of a closed steel pipe (2-2) and core-filled concrete (2-1). The top of the web (1) is welded to the closed steel pipe (2-2), and the core-filled concrete (2-1) is filled in the closed steel pipe (2-2).

4. A trough-shaped steel plate double-combined beam bridge according to claim 1, characterized in that: The friction bolt (5-2) includes a screw rod, a nut and an energy-dissipating gasket (5-3). The energy-dissipating gasket (5-3) is a metal with an elastic modulus lower than that of the web. The U-shaped longitudinal rib (5-1) is a metal with an elastic modulus lower than that of the web (1) and the column (6).

5. The double-combined girder bridge of a channel steel plate according to claim 1, wherein: The distance L1 from the inner side wall of the concave of the cast-in-place bridge deck (4-2) to the center line of the bridge deck < the distance L2 from the inner side wall of the U-shaped longitudinal rib (5-1) to the center line of the bridge deck < the distance L3 from the inner side wall of the composite upper flange (2) to the center line of the bridge deck.

6. The construction steps of the double-combined girder bridge with grooved steel plates according to claim 1, characterized in that: It is carried out according to the following steps: Step 1: Complete the processing of the web, composite upper flange, steel plate lower flange, corrugated steel plate, U-shaped longitudinal rib, and column in the factory. And assemble the web, composite upper flange, steel plate lower flange, and column into a beam segment. Step 2: Transport the beam segment to the construction site, carry out beam segment assembly, and weld and connect the corrugated steel plate and the web. Step 3: Hoist the steel beam as a whole to the bridge location, weld shear studs, pour the cast-in-place bridge deck, and carry out bridge deck paving. Step 4: Pour core-filled concrete into the closed steel pipe. Step 5: Install the energy-dissipating anti-collision beam.

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