Novel wind-resistant stable combined bridge deck structure form and construction method

Abstract

The invention relates to the technical field of wind-resistant stable combined bridge deck structures, in particular to a novel wind-resistant stable combined bridge deck structure form and a construction method. According to the technical scheme, the bridge deck comprises a bridge deck body and further comprises a steel box girder fixedly installed at the bottom of the bridge deck body, a splitter plate is fixedly installed at the bottom of the steel box girder, an overhaul channel is fixedly installed on the splitter plate, guide plates are fixedly installed on the splitter plate and located on the two sides of the overhaul channel, and a pneumatic grating guardrail is fixedly installed on the bridge deck body. A pneumatic wing plate is rotationally installed on the pneumatic grid guardrail, and a central stabilizing plate is poured in the center of the bridge deck slab. The structural form is particularly suitable for bridge floors of oversized-span sea-crossing bridges, the advantages of a combined structure can be brought into play to the maximum extent, and excellent wind resistance is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of wind-resistant and stable composite bridge deck structures, and in particular to a novel wind-resistant and stable composite bridge deck structure form and a construction method. Background Art

[0002] The deck of a super-long-span sea-crossing bridge is one of its most important components. It carries traffic functions and directly affects the overall performance and safety of the bridge. The deck is usually made of strong steel or concrete structures that can withstand heavy loads and adapt to various environmental conditions. Steel box girders are a common structural form that has high strength and good durability.

[0003] The deck of a super-long-span sea-crossing bridge needs to consider wind-resistant structures. Wind force is an important factor affecting the safety and stability of bridges. Especially in a sea-crossing environment, strong winds may cause bridge vibrations and affect driving safety. Summary of the invention

[0004] The purpose of the present invention is to address the problems existing in the background technology and to propose a new wind-resistant and stable composite bridge deck structure and construction method.

[0005] On the one hand, the present invention proposes a new type of wind-resistant and stable composite bridge deck structure, including a bridge deck, and also includes: a steel box girder fixedly installed on the bottom of the bridge deck, a diverter plate fixedly installed on the bottom of the steel box girder, an inspection channel fixedly installed on the diverter plate, guide plates fixedly installed on the diverter plate and on both sides of the inspection channel, a pneumatic grille guardrail fixedly installed on the bridge deck, a pneumatic wing plate rotatably installed on the pneumatic grille guardrail, and a central stabilizing plate cast in the center of the bridge deck.

[0006] Optionally, the steel box girder is a single-box multi-chamber section, specifically 2-3 chambers, and the webs of the steel box girder on both sides are inclined outward with an inclination angle of 20°-50°.

[0007] Optionally, the bottom plate of the steel box girder extends outward as a diverter plate, and the extension distance of the steel box girder is 1 / 5 times the lateral distance of the bridge deck.

[0008] Optionally, the steel box girder is used in combination of an open section form and a closed combined section form, with an open section form being used in the mid-span positive bending moment zone and a closed section form being used in the support negative bending moment zone.

[0009] Optionally, the upper edge of the open section form is arranged with an ordinary bolt connector, and the upper edge of the closed section form is arranged with a pull-out resistant but not shear resistant connector when the top plate is under tension, and an ordinary bolt connector when the top plate is not under tension.

[0010] Optionally, the bottom of the closed section of the negative bending moment zone of the support is filled with concrete, and ordinary bolt connectors are installed on the concrete.

[0011] Optionally, the guide plates located on both sides of the inspection channel are inclined toward the inspection channel, and the angle between the two guide plates is 20°-40°.

[0012] Optionally, the pneumatic grille guardrail includes a plurality of vertical bars fixedly mounted on the bridge deck, a plurality of cross plates fixedly mounted between two adjacent vertical bars, a slide groove is provided on the vertical bar, the vertical bar is located inside the slide groove and fixedly connected to the vertical bar by bolt fasteners, a plurality of positioning blocks are installed on the vertical bar, the bottom positioning block is fixedly connected to the vertical bar, and the remaining positioning blocks are slidably connected to the vertical bar, and a driving mechanism is installed on the vertical bar for controlling the position of a positioning block located above the positioning block according to whether the positioning block bears the load of the cross plate.

[0013] Optionally, the driving mechanism includes a pressure rod slidably mounted on the positioning block and a plurality of first oil barrels fixedly mounted inside the slide groove, the pressure rod being slidably connected to the first oil barrel, an oil pipe being fixedly mounted on the bottom of the first oil barrel, a plurality of second oil barrels being fixedly mounted inside the vertical rod, the oil pipe being fixedly connected to the bottom of the second oil barrel, a driving rod being fixedly mounted on the second oil barrel, the driving rod corresponding to the positioning block one by one and fixedly connected, and the first oil barrel, the oil pipe and the second oil barrel are all filled with hydraulic oil.

[0014] On the other hand, the present invention provides a novel wind-resistant and stable composite bridge deck structure construction method, which is applied to the novel wind-resistant and stable composite bridge deck structure form described above, and the method comprises the following steps:

[0015] Step 1: Hoist and fix the steel box girder, and use high-strength bolts or on-site welding to connect the steel box girder segments;

[0016] Step 2: Install ordinary stud connectors and pull-out but not shear-resistant connectors;

[0017] Step 3: pour concrete at the bottom of the negative moment area of ​​the support;

[0018] Step 4: Laying prefabricated panels;

[0019] Step 5: pouring cast-in-place concrete;

[0020] Step 6: Install the inspection channel, which is connected to the bottom of the steel box girder by high-strength bolts or on-site welding;

[0021] Step 7: Install the guide plate, which is fixed to the bottom of the steel box girder by on-site welding;

[0022] Step 8: After the cast-in-place concrete has initially set, install the pneumatic grille guardrail;

[0023] Step 9: Formwork and cast the central stabilizing plate;

[0024] Step 10: Install the pneumatic wing panels above the pneumatic grille guardrail.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] The bridge deck of the present invention adopts a composite board form, which can realize formwork-free construction, and the laying of prefabricated boards is fast and convenient, which shortens the construction period to the greatest extent. The structural form of the high-performance composite bridge deck is combined with wind-resistant structural measures, so that the bridge deck structure has excellent bearing capacity, rigidity and wind-resistant stability.

[0027] Furthermore, various parts such as steel box girders, prefabricated panels, pneumatic grille guardrails, guide plates, etc. can be prefabricated in factories, reducing the workload of on-site construction and contributing to the industrialization of construction. In summary, this structural form is particularly suitable for the bridge deck of super-large span cross-sea bridges, which can maximize the advantages of the combined structure and has excellent wind resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The structural diagram of the wind-resistant and stable composite bridge deck structure is given. Figure 1 ;

[0029] Figure 2 The structural diagram of the wind-resistant and stable composite bridge deck structure is given. Figure 2 ;

[0030] Figure 3 The structural schematic diagram of the wind-resistant and stable composite bridge deck structure is given. Figure 3 ;

[0031] Figure 4 It is a structural schematic diagram of the pneumatic grille guardrail of the present invention;

[0032] Figure 5 A schematic structural diagram of the driving mechanism of the present invention is given;

[0033] Figure 6 for Figure 5 A partial enlarged view of the middle A;

[0034] Figure 7 for Figure 5 A partial enlarged view of point B in the middle.

[0035] Figure numerals: 1. Bridge deck; 2. Steel box girder; 3. Diverter plate; 4. Maintenance passage; 5. Guide plate; 6. Pneumatic grille guardrail; 601. Vertical bar; 602. Horizontal plate; 603. Slide; 604. Positioning block; 605. Pressure rod; 606. First oil drum; 607. Oil pipe; 608. Second oil drum; 609. Drive rod; 610. Hydraulic oil; 7. Pneumatic wing plate; 8. Central stabilizing plate; 9. Ordinary bolt connector; 10. Non-shear resistant connector; 11. Concrete. DETAILED DESCRIPTION

[0036] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0037] Embodiment 1, as Figure 1 to Figure 2 As shown, on the one hand, the present invention proposes a new type of wind-resistant and stable composite bridge deck structure, including a bridge deck 1, and also including: a steel box girder 2 fixedly installed at the bottom of the bridge deck 1, the bridge deck 1 adopts a reinforced concrete composite slab structure, and is composed of a precast slab and a cast-in-place layer to form a whole body that is jointly subjected to force, and the precast slab is laid on the steel box girder 2, and the steel box girder 2 is a single-box multi-chamber section, specifically 2-3 chambers, and the webs of the steel box girders 2 on both sides are inclined outward, and the inclination angle is 20°-50°. The steel box girder 2 is used in combination with an open section form and a closed section form. In the mid-span positive bending moment zone, an open section form is adopted, and in the support negative bending moment zone, a closed section form is adopted. The upper edge of the open section form is arranged with a common bolt connector 9, and the upper edge of the closed section form is arranged with a pull-out but non-shear connector 10 when the top plate is under tension, and the upper edge of the closed section form is arranged when the top plate is under tension, and the ordinary bolt connector 9 is arranged when the top plate is not under tension. The bottom of the closed section in the negative bending moment area of ​​the support is filled with concrete 11, and a common bolt connector 9 is installed on the concrete 11.

[0038] Furthermore, a diverter plate 3 is fixedly installed at the bottom of the steel box girder 2, and the bottom plate of the steel box girder 2 extends outward as the diverter plate 3, and the extension distance of the steel box girder 2 is 1 / 5 times the lateral distance of the bridge deck 1. An inspection channel 4 is fixedly installed on the diverter plate 3, and the inspection channel 4 is suspended below the steel box girder for daily inspection and maintenance during the use of the bridge. Guide plates 5 are fixedly installed on the diverter plate 3 and on both sides of the inspection channel 4. The guide plates 5 on both sides of the inspection channel 4 are inclined toward the direction close to the inspection channel 4, and the angle between the two guide plates 5 is 20°-40°.

[0039] Furthermore, a pneumatic grille guardrail 6 is fixedly installed on the bridge panel 1. The pneumatic grille guardrail 6 adopts a steel structure, has holes opened in the horizontal direction, and leaves a large gap at the bottom. A pneumatic wing plate 7 is rotatably installed on the pneumatic grille guardrail 6. The pneumatic wing plate 7 is installed at the top of the pneumatic grille guardrail 6. The pneumatic wing plate 7 has a streamlined shape, and the pneumatic wing plate 7 has a certain range of rotation amplitude on the pneumatic grille guardrail 6.

[0040] A central stabilizing plate 8 is cast in the center of the bridge deck 1. The central stabilizing plate 8 is a reinforced concrete structure, cast in the center of the bridge deck 1, and serves as a separator for lanes on both sides.

[0041] On the other hand, the present invention provides a novel wind-resistant and stable composite bridge deck structure construction method, which is applied to the above novel wind-resistant and stable composite bridge deck structure form, and the method comprises the following steps:

[0042] Step 1: hoist and fix the steel box girder 2, and use high-strength bolts or on-site welding to connect the sections of the steel box girder 2;

[0043] Step 2: Install the common stud connector 9 and the pull-out but not shear-resistant connector 10;

[0044] Step 3: pouring concrete 11 at the bottom of the negative moment zone of the support;

[0045] Step 4: Laying prefabricated panels;

[0046] Step 5: pouring cast-in-place concrete;

[0047] Step 6: Install the inspection channel 4, which is connected to the bottom of the steel box girder 2 by high-strength bolts or on-site welding;

[0048] Step 7: Install the guide plate 5, which is fixed to the bottom of the steel box girder 2 by on-site welding;

[0049] Step 8: After the cast-in-place concrete is initially set, install the pneumatic grille guardrail 6;

[0050] Step 9: Formwork and cast the central stabilizing plate 8;

[0051] Step 10: Install the pneumatic wing plate 7 above the pneumatic grille guardrail 6.

[0052] The working principle of this embodiment is as follows: the concrete composite slab bridge deck 1 and the steel box girder 2 form a composite beam force transmission system, which bears the load of the bridge deck 1 and transmits it to the bridge tower structure. When the wind comes horizontally, the wind is first separated into two streams, upward and downward, by the diverter plate 3. The upward part of the wind is guided away along the outer side of the steel box girder 2, and then dissipated through the pneumatic grille guardrail 6, so that the wind load directly acting on the structure of the bridge deck 1 is small, and the downward part of the wind is guided away along the guide plate 5, so that the wind load directly acting on the structure of the bridge deck 1 is small. When the wind comes from a high altitude, the pneumatic wing plate 7 will automatically adjust the angle according to the wind load to make the wind field smoother and reduce the wind load on the bridge deck. The central stabilizing plate 8 can reduce the wind-induced vibration effect of the bridge deck 1 and avoid vibration damage to the bridge deck 1 caused by flutter, vortex-induced resonance, etc.

[0053] Embodiment 2, as Figure 1 to Figure 2As shown, based on the first embodiment, the pneumatic grille guardrail 6 includes a plurality of vertical rods 601 fixedly mounted on the bridge deck 1, a plurality of horizontal plates 602 are fixedly mounted between two adjacent vertical rods 601, a gap is left between two adjacent horizontal plates 602, a slide groove 603 is provided on the vertical rod 601, the vertical rod 601 is located inside the slide groove 603 and is fixedly connected to the vertical rod 601 by bolt fasteners, when installing the horizontal plate, the horizontal plate 602 is first hoisted and placed inside the slide groove 603, after the horizontal plate 602 is adjusted to the installation position, it is fastened by bolt connection.

[0054] A plurality of positioning blocks 604 are installed on the vertical rod 601. The positioning block 604 at the bottom is fixedly connected to the vertical rod 601, and the other positioning blocks 604 are slidably connected to the vertical rod 601. The horizontal plate 602 is supported by the positioning blocks 604. When the horizontal plate 602 at the bottom is installed, the upper positioning block 604 is located inside the vertical rod 601, and will not interfere with the installation of the lower horizontal plate 602. A driving mechanism is installed on the vertical rod 601 to control the position of a positioning block 604 located above the positioning block 604 according to whether the positioning block 604 bears the load of the horizontal plate 602. When the lower positioning block 604 contacts the horizontal plate 602, the upper positioning block 604 moves outward under the action of the driving mechanism, so that the upper horizontal plate 602 can be supported and positioned.

[0055] The driving mechanism includes a pressure rod 605 slidably mounted on the positioning block 604 and a plurality of first oil barrels 606 fixedly mounted inside the slide groove 603. The pressure rod 605 is slidably connected to the first oil barrel 606. An oil pipe 607 is fixedly mounted on the bottom of the first oil barrel 606. A plurality of second oil barrels 608 are fixedly mounted inside the vertical rod 601. The oil pipe 607 is fixedly connected to the bottom of the second oil barrel 608. A driving rod 609 is fixedly mounted on the second oil barrel 608. The driving rod 609 corresponds to the positioning block 604 one by one and is fixedly connected. The first oil barrel 606, the oil pipe 607 and the second oil barrel 608 are all filled with hydraulic oil 610. During the descent of the horizontal plate 602, the horizontal plate 602 will squeeze the pressure rod 605, and the pressure rod 605 will move downward and squeeze the hydraulic oil 610 inside the first oil barrel 606. At this time, the hydraulic oil 610 inside the first oil barrel 606 will enter the second oil barrel 608 through the transmission of the oil pipe 607, and will push the driving rod 609 to move. The positioning block 604 can be pushed out by the driving rod 609, and the positioning block 604 of the vertical rod 601 can be moved out to support the horizontal plate 602, thereby effectively improving the positioning accuracy and installation efficiency of the horizontal plate 602.

[0056] The working principle of this embodiment is that the horizontal plate 602 is supported by the positioning block 604. When the bottom horizontal plate 602 is installed, the upper positioning block 604 is located inside the vertical rod 601, and will not interfere with the installation of the lower horizontal plate 602. During the descent of the horizontal plate 602, the horizontal plate 602 will squeeze the pressure rod 605, and the pressure rod 605 will move downward and squeeze the hydraulic oil 610 inside the first oil barrel 606. At this time, the hydraulic oil 610 inside the first oil barrel 606 will enter the second oil barrel 608 through the transmission of the oil pipe 607, and will push the driving rod 609 to move. The positioning block 604 can be pushed out by the driving rod 609, and the positioning block 604 moved out of the vertical rod 601 can support the horizontal plate 602, thereby effectively improving the positioning accuracy and installation efficiency of the horizontal plate 602.

[0057] The above specific embodiments are only several optional embodiments of the present invention. Based on the technical solutions of the present invention and the relevant inspirations of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A new type of wind-resistant and stable composite bridge deck structure, comprising a bridge deck (1), characterized in that: Also includes: A steel box girder (2) fixedly mounted on the bottom of a bridge deck (1), a diverter plate (3) fixedly mounted on the bottom of the steel box girder (2), an inspection channel (4) fixedly mounted on the diverter plate (3), and guide plates (5) fixedly mounted on the diverter plate (3) and on both sides of the inspection channel (4); A pneumatic grille guardrail (6) is fixedly mounted on the bridge deck (1), a pneumatic wing plate (7) is rotatably mounted on the pneumatic grille guardrail (6), and a central stabilizing plate (8) is cast in the center of the bridge deck (1).

2. According to claim 1, the new wind-resistant and stable composite bridge deck structure is characterized in that: The steel box girder (2) is a single-box multi-chamber cross-section, specifically 2-3 chambers, and the webs of the steel box girders (2) on both sides are inclined outwards, with an inclination angle of 20°-50°.

3. The novel wind-resistant and stable composite bridge deck structure according to claim 1 is characterized in that: The bottom plate of the steel box girder (2) extends outwards to serve as a diverter plate (3), and the extension distance of the steel box girder (2) is 1 / 5 of the lateral distance of the bridge deck (1).

4. The novel wind-resistant and stable composite bridge deck structure according to claim 1 is characterized in that: The steel box girder (2) is a combination of an open section and a closed section. The open section is used in the mid-span positive bending moment area, and the closed section is used in the support negative bending moment area.

5. The novel wind-resistant and stable composite bridge deck structure according to claim 4 is characterized in that: The upper edge of the open section form is arranged with a common bolt connector (9); the upper edge of the closed section form is arranged with a pull-out resistant but non-shear resistant connector (10) when the top plate is under tension; and the upper edge of the closed section form is arranged with a common bolt connector (9) when the top plate is not under tension.

6. The novel wind-resistant and stable composite bridge deck structure according to claim 1 is characterized in that: The bottom of the closed cross-section of the negative bending moment zone of the support is filled with concrete (11), and a common bolt connector (9) is installed on the concrete (11).

7. The novel wind-resistant and stable composite bridge deck structure according to claim 1 is characterized in that: The guide plates (5) located on both sides of the inspection channel (4) are inclined in a direction close to the inspection channel (4), and the angle between the two guide plates (5) is 20°-40°.

8. The novel wind-resistant and stable composite bridge deck structure according to claim 1 is characterized in that: The pneumatic grille guardrail (6) comprises a plurality of vertical rods (601) fixedly mounted on the bridge deck (1), a plurality of transverse plates (602) fixedly mounted between two adjacent vertical rods (601), a slide groove (603) being provided on the vertical rod (601), the vertical rod (601) being located inside the slide groove (603) and being fixedly connected to the vertical rod (601) via bolt fasteners, a plurality of positioning blocks (604) being mounted on the vertical rod (601), a positioning block (604) at the bottom being fixedly connected to the vertical rod (601), and the remaining positioning blocks (604) being slidably connected to the vertical rod (601), and a driving mechanism for controlling the position of a positioning block (604) located above the positioning block (604) according to whether the positioning block (604) bears the load of the transverse plate (602) being mounted on the vertical rod (601).

9. The novel wind-resistant and stable composite bridge deck structure according to claim 9 is characterized in that: The driving mechanism comprises a pressure rod (605) slidably mounted on the positioning block (604) and a plurality of first oil barrels (606) fixedly mounted inside the slide groove (603); the pressure rod (605) is slidably connected to the first oil barrel (606); an oil pipe (607) is fixedly mounted at the bottom of the first oil barrel (606); a plurality of second oil barrels (608) are fixedly mounted inside the vertical rod (601); the oil pipe (607) is fixedly connected to the bottom of the second oil barrel (608); a driving rod (609) is fixedly mounted on the second oil barrel (608); the driving rod (609) corresponds to the positioning block (204) one by one and is fixedly connected; the first oil barrel (606), the oil pipe (607) and the second oil barrel (608) are all filled with hydraulic oil (610).

10. A novel wind-resistant and stable composite bridge deck structure construction method, applied to the novel wind-resistant and stable composite bridge deck structure according to any one of claims 1 to 9, the method comprising the following steps: Step 1: hoisting and fixing the steel box girder (2), and connecting the sections of the steel box girder (2) with high-strength bolts or on-site welding; Step 2: Installing common bolt connectors (9) and pull-out-resistant but non-shear-resistant connectors (10); Step 3: pouring concrete at the bottom of the negative moment zone of the support (11); Step 4: Laying prefabricated panels; Step 5: pouring cast-in-place concrete; Step 6: Install the inspection channel (4), which is connected to the bottom of the steel box girder (2) by high-strength bolts or on-site welding; Step 7: Install the guide plate (5), which is fixed to the bottom of the steel box girder (2) by on-site welding; Step 8: After the cast-in-place concrete has initially set, install the pneumatic grille guardrail (6); Step 9: Formwork and cast the central stabilizing plate (8); Step 10: Install the pneumatic wing plate (7) above the pneumatic grille guardrail (6).

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