A new type of wind-resistant stable combination bridge deck structure form and construction method

Abstract

The present application relates to the technical field of wind-resistant stable combined bridge deck structure, and particularly relates to a novel wind-resistant stable combined bridge deck structure form and a construction method. The technical scheme comprises: a bridge deck slab, further comprising a steel box girder fixedly installed at the bottom of the bridge deck slab, a flow divider fixedly installed at the bottom of the steel box girder, a maintenance access fixedly installed on the flow divider, guide vanes fixedly installed on the flow divider and located on both sides of the maintenance access, pneumatic grating guardrails fixedly installed on the bridge deck slab, pneumatic wing plates rotatably installed on the pneumatic grating guardrails, and a central stabilizing plate cast in the center of the bridge deck slab. The structure form is particularly suitable for the bridge deck of an ultra-large-span sea-crossing bridge, can maximize the advantages of the combined structure, and has excellent wind resistance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wind-resistant and stable combined bridge deck structures, and in particular to a novel wind-resistant and stable combined bridge deck structure and a construction method. BACKGROUND

[0002] The bridge deck of an ultra-long-span sea-crossing bridge is one of its most important components, as it bears the traffic function and directly affects the overall performance and safety of the bridge. The bridge deck is usually composed 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 offers high strength and good durability.

[0003] The bridge deck of an ultra-long-span sea-crossing bridge needs to consider wind-resistant structures. Wind force is an important factor that affects the safety and stability of the bridge. In particular, in a sea-crossing environment, strong winds can cause bridge vibrations, affecting driving safety. SUMMARY

[0004] The purpose of the present application is to address the problems in the background art by proposing a novel wind-resistant and stable combined bridge deck structure and a construction method.

[0005] In one aspect, the present application proposes a novel wind-resistant and stable combined bridge deck structure, which includes a bridge deck slab and further comprises: a steel box girder fixedly installed at the bottom of the bridge deck slab, a flow distribution plate fixedly installed at the bottom of the steel box girder, a maintenance access fixedly installed on the flow distribution plate, guide vanes fixedly installed on the flow distribution plate on both sides of the maintenance access, pneumatic grating guardrails fixedly installed on the bridge deck slab, pneumatic wing plates rotatably installed on the pneumatic grating guardrails, and a central stabilizing plate cast in the center of the bridge deck slab.

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

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

[0008] Optionally, the steel box girder is used in combination with an open cross-section form and a closed cross-section form, and in the central positive bending moment area, the open cross-section form is used, while in the support negative bending moment area, the closed cross-section form is used.

[0009] Optionally, the upper edge of the open cross-section form is arranged with ordinary bolted connectors, and the upper edge of the closed cross-section form is arranged with anti-pull and non-shear connectors if the top plate is in tension, or with ordinary bolted connectors if the top plate is not in tension.

[0010] Optionally, the closed section form bottom of the support negative bending moment area is filled with concrete, and a common bolt connector is installed on the concrete.

[0011] Optionally, the flow guide plates on both sides of the maintenance channel are inclined towards the maintenance channel, and the included angle between the two flow guide plates is 20-40 degrees.

[0012] Optionally, the pneumatic grid guardrail comprises a plurality of vertical rods fixedly installed on the bridge deck, a plurality of horizontal plates fixedly installed between adjacent two vertical rods, a sliding groove provided on the vertical rod, the horizontal plate being located inside the sliding groove and being fixedly connected with the vertical rod through a bolt fastener, a plurality of positioning blocks installed on the vertical rod, the bottom positioning block being fixedly connected with the vertical rod, and the remaining positioning blocks being slidingly connected with the vertical rod, and a driving mechanism installed on the vertical rod and controlling the position of a positioning block above the positioning block according to whether the positioning block bears the horizontal plate.

[0013] Optionally, the driving mechanism comprises a pressing rod slidingly installed on the positioning block, a plurality of first oil barrels fixedly installed inside the sliding groove, the pressing rod being slidingly connected with the first oil barrel, an oil pipe fixedly installed at the bottom of the first oil barrel, a plurality of second oil barrels fixedly installed in the vertical rod, the oil pipe being fixedly connected with the bottom of the second oil barrel, a driving rod slidingly installed on the second oil barrel, the driving rod corresponding to and being fixedly connected with the positioning block, and the first oil barrel, the oil pipe and the second oil barrel being filled with hydraulic oil.

[0014] In another aspect, the application provides a novel wind-resistant stable combined bridge deck structure construction method, which is applied to the novel wind-resistant stable combined bridge deck structure form, and comprises the following steps:

[0015] Step one: hoisting and fixing the steel box girder, and connecting or field welding the steel box girder segments by high-strength bolts;

[0016] Step two: installing common bolt connectors and pull-out non-shear connectors;

[0017] Step three: pouring the bottom concrete of the support negative bending moment area;

[0018] Step four: laying the prefabricated plate;

[0019] Step five: pouring the cast-in-place layer concrete;

[0020] Step six: installing the maintenance channel, and connecting the maintenance channel to the bottom of the steel box girder by high-strength bolts or field welding;

[0021] Step seven: installing the flow guide plate, and fixing the flow guide plate to the bottom of the steel box girder by field welding;

[0022] Step eight: after the initial setting of the cast-in-place layer concrete, install the pneumatic grid guardrail;

[0023] Step nine: support the pouring of the central stabilizing plate;

[0024] Step ten: install the pneumatic wing plate above the pneumatic grid guardrail.

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

[0026] The bridge deck of the present application adopts the form of a composite slab, which can realize formwork-free construction, and the laying of the prefabricated slab is fast and convenient, greatly shortening the construction period. The combination of the structural form of the high-performance composite bridge deck and the wind-resistant structural measures enables the bridge deck structure to have excellent bearing capacity, stiffness and wind-resistant stability performance;

[0027] Further, the steel box girder, the prefabricated slab, the pneumatic grid guardrail, the deflector plate and other parts can be prefabricated in a factory, 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 an ultra-large-span sea-crossing bridge, can maximize the advantages of the composite structure, and has excellent wind-resistant performance. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 Give the structure of the wind-resistant stable composite bridge deck structure Figure 1 ;

[0029] Figure 2 Give the structure of the wind-resistant stable composite bridge deck structure Figure 2 ;

[0030] Figure 3 Give the structure of the wind-resistant stable composite bridge deck structure Figure 3 ;

[0031] Figure 4 The structure of the pneumatic grid guardrail of the present application is shown in the figure;

[0032] Figure 5 The structure of the driving mechanism of the present application is shown in the figure;

[0033] Figure 6 is Figure 5 the enlarged view of part A;

[0034] Figure 7 is Figure 5 the enlarged view of part B.

[0035] Reference 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 groove; 604. Positioning block; 605. Pressure bar; 606. First oil tank; 607. Oil pipe; 608. Second oil tank; 609. Drive rod; 610. Hydraulic oil; 7. Pneumatic wing plate; 8. Central stabilizing plate; 9. Ordinary stud connector; 10. Non-shear resistant connector; 11. Concrete. Detailed Implementation

[0036] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0037] Example 1, as Figures 1 to 2 As shown, the present invention proposes a novel wind-resistant and stable composite bridge deck structure, including a bridge deck 1 and 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, which is composed of precast slabs and cast-in-place layers to form a whole that shares the load. The precast slabs are laid on the steel box girder 2, which has a single-box multi-cell section, specifically 2-3 cells. The webs of the steel box girder 2 on both sides are inclined outward at an angle of 20°-50°. The steel box girder 2 uses a combination of open and closed cross-sections. In the positive bending moment zone at mid-span, the open cross-section is used, and in the negative bending moment zone at the supports, the closed cross-section is used. Ordinary stud connectors 9 are arranged at the upper edge of the open cross-section. In the case of tension on the top plate, pull-out but not shear-resistant connectors 10 are arranged at the upper edge of the closed cross-section. In the case of no tension on the top plate, ordinary stud connectors 9 are arranged. The bottom of the closed section of the negative bending moment zone of the support is filled with concrete 11, and ordinary stud connectors 9 are installed on the concrete 11.

[0038] Furthermore, a diversion plate 3 is fixedly installed at the bottom of the steel box girder 2. The bottom plate of the steel box girder 2 extends outward as the diversion plate 3, and the outward extension distance of the steel box girder 2 is 1 / 5 times the lateral distance of the bridge deck 1. A maintenance passage 4 is fixedly installed on the diversion plate 3. The maintenance passage 4 is suspended below the steel box girder and is used for daily maintenance during the use of the bridge. Guide plates 5 are fixedly installed on the diversion plate 3 and on both sides of the maintenance passage 4. The guide plates 5 on both sides of the maintenance passage 4 are tilted towards the maintenance passage 4, and the included angle between the two guide plates 5 is 20°-40°.

[0039] Furthermore, a pneumatic grille guardrail 6 is fixedly installed on the bridge deck 1. The pneumatic grille guardrail 6 is made of steel, with openings along the horizontal direction and 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 a certain range of rotation on the pneumatic grille guardrail 6.

[0040] The central stable plate 8 is a reinforced concrete structure and is cast in the center of the bridge deck slab 1 and serves as a partition between the two lanes.

[0041] In another aspect, the application provides a construction method of a new wind-resistant stable combined bridge deck structure, which is applied to the new wind-resistant stable combined bridge deck structure form, and the method comprises the following steps:

[0042] Step one: hoisting and fixing the steel box girder 2, and connecting or on-site welding the steel box girder 2 segments by high-strength bolts;

[0043] Step two: installing the ordinary peg connector 9 and the pull-out but not shear connector 10;

[0044] Step three: casting the bottom concrete 11 of the support negative bending moment area;

[0045] Step four: laying the prefabricated plate;

[0046] Step five: casting the cast-in-place layer concrete;

[0047] Step six: installing the maintenance access 4, which is connected to the bottom of the steel box girder 2 by high-strength bolts or on-site welding;

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

[0049] Step eight: after the cast-in-place layer concrete is initially set, installing the pneumatic grille guardrail 6;

[0050] Step nine: supporting and casting the central stable plate 8;

[0051] Step ten: installing the pneumatic wing plate 7 above the pneumatic grille guardrail 6.

[0052] The working principle of the embodiment is that the concrete composite slab bridge deck slab 1 and the steel box girder 2 form a combined beam force transmission system, bear the load of the bridge deck slab 1 and transmit it to the bridge tower structure, when the wind comes from the horizontal direction, the wind is first separated into two parts upward and downward by the flow splitter 3, the upward part of the wind is guided away along the outside 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 slab 1 is small, the downward part of the wind is guided away along the flow guide plate 5, so that the wind load directly acting on the structure of the bridge deck slab 1 is small. When the wind comes from a high place, the pneumatic wing plate 7 will automatically adjust the angle according to the wind load, so that the wind field is smoother and the wind load on the bridge deck is reduced. The central stable plate 8 can reduce the wind-induced vibration effect of the bridge deck slab 1 and avoid vibration damage of the bridge deck slab 1 caused by flutter and vortex-induced resonance.

[0053] In embodiment two, as Figures 1 to 2As shown, based on the basis of example one, the pneumatic grille guard 6 includes a plurality of vertical rods 601 fixedly installed on the bridge deck slab 1, a plurality of horizontal plates 602 fixedly installed between adjacent two vertical rods 601, a gap left between adjacent two horizontal plates 602, a sliding groove 603 provided on the vertical rod 601, and the horizontal plate 602 located inside the sliding groove 603 and fixedly connected with the vertical rod 601 through a bolt fastener. When the horizontal plate is installed, the horizontal plate 602 is first hoisted and placed into the sliding groove 603, and after the horizontal plate 602 is adjusted to the installation position, it is fastened and connected through bolt connection.

[0054] A plurality of positioning blocks 604 are installed on the vertical rod 601, the bottom positioning block 604 is fixedly connected with the vertical rod 601, and the remaining positioning blocks 604 are slidingly connected with the vertical rod 601. 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 does 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 above the positioning block 604 according to whether the positioning block 604 supports 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, thereby supporting and positioning the upper horizontal plate 602.

[0055] The driving mechanism includes a pressing rod 605 slidingly installed on the positioning block 604, a plurality of first oil barrels 606 fixedly installed inside the sliding groove 603, the pressing rod 605 slidingly connected with the first oil barrel 606, an oil pipe 607 fixedly installed at the bottom of the first oil barrel 606, a plurality of second oil barrels 608 fixedly installed in the vertical rod 601, the oil pipe 607 fixedly connected with the bottom of the second oil barrel 608, a driving rod 609 slidingly installed on the second oil barrel 608, the driving rod 609 corresponding to and fixedly connected with the positioning block 604, and hydraulic oil 610 filled in the first oil barrel 606, the oil pipe 607 and the second oil barrel 608. During the descent of the horizontal plate 602, the horizontal plate 602 will extrude the pressing rod 605, the pressing rod 605 will move downward and extrude the hydraulic oil 610 in the first oil barrel 606. At this time, the hydraulic oil 610 in the first oil barrel 606 will be transmitted into the second oil barrel 608 through the oil pipe 607 and will push the driving rod 609 to move. The positioning block 604 can be pushed out through the driving rod 609, and the positioning block 604 removed from the vertical rod 601 can support the horizontal plate 602, thereby effectively improving the positioning accuracy and installation efficiency of the horizontal plate 602.

[0056] The working principle of the 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 in the inside of the vertical rod 601, and does not interfere with the installation of the lower horizontal plate 602. In the process of descending of the horizontal plate 602, the horizontal plate 602 will extrude the pressing rod 605, the pressing rod 605 will move downward and extrude the hydraulic oil 610 in the first oil barrel 606, the hydraulic oil 610 in the first oil barrel 606 will be driven into the second oil barrel 608 through the oil pipe 607 at this time, and will push the driving rod 609 to move, the positioning block 604 can be pushed out through the driving rod 609, the positioning block 604 in the vertical rod 601 is removed, the horizontal plate 602 can be supported, and the positioning accuracy and installation efficiency of the horizontal plate 602 can be effectively improved.

[0057] The above specific embodiments are only several optional embodiments of the present application, and based on the technical scheme of the present application and the related inspiration of the above embodiments, those skilled in the art can make various alternative improvements and combinations on the above specific embodiments.

Claims

1. A new type of wind-resistant stable composite deck structure form comprising a deck slab (1), characterized in that, Also include: The steel box girder (2) is fixedly installed at the bottom of the bridge deck slab (1), the bottom of the steel box girder (2) is fixedly installed with a flow distribution plate (3), the flow distribution plate (3) is fixedly installed with an inspection channel (4), and the flow distribution plate (3) is fixedly installed with a flow guide plate (5) on both sides of the inspection channel (4); The pneumatic grille guardrail (6) is rotatably installed on the bridge deck slab (1), and the bridge deck slab (1) is centrally poured with a central stabilizing plate (8); The pneumatic grille guardrail (6) includes a plurality of vertical rods (601) fixedly installed on the bridge deck slab (1), a plurality of horizontal plates (602) fixedly installed between adjacent two vertical rods (601), a sliding groove (603) arranged on the vertical rod (601), the horizontal plate (602) located inside the sliding groove (603) and fixedly connected with the vertical rod (601) through a bolt fastener, a plurality of positioning blocks (604) installed on the vertical rod (601), the bottom positioning block (604) fixedly connected with the vertical rod (601), and the remaining positioning blocks (604) slidably connected with the vertical rod (601), and a driving mechanism installed on the vertical rod (601) for controlling the position of a positioning block (604) above the positioning block (604) according to whether the positioning block (604) bears the horizontal plate (602); The driving mechanism includes a pressing rod (605) slidably installed on the positioning block (604), a plurality of first oil barrels (606) fixedly installed inside the sliding groove (603), the pressing rod (605) slidably connected with the first oil barrel (606), an oil pipe (607) fixedly installed at the bottom of the first oil barrel (606), a plurality of second oil barrels (608) fixedly installed inside the vertical rod (601), the oil pipe (607) fixedly connected with the bottom of the second oil barrel (608), a driving rod (609) slidably installed on the second oil barrel (608), the driving rod (609) corresponding to and fixedly connected with the positioning block (604), and the first oil barrel (606), the oil pipe (607) and the second oil barrel (608) all filled with hydraulic oil (610).

2. A new type of wind-resistant stable composite deck structure form according to claim 1, characterized in that, The steel box girder (2) is a single-box multi-chamber section, specifically 2-3 chambers, and the web plates of the steel box girders (2) on both sides are inclined outward with an inclination angle of 20°-50°.

3. A new type of wind-resistant stable composite deck structure form according to claim 1, characterized in that, The bottom plate of the steel box girder (2) is extended as the flow distribution plate (3), and the extension distance of the steel box girder (2) is 1 / 5 of the horizontal distance of the bridge deck slab (1).

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

5. A new type of wind-resistant stable composite deck structure form according to claim 4, characterized in that, The upper edge of the open section form is arranged with a general stud connector (9), the upper edge of the closed section form is arranged with a pull-resistant and shear-resistant connector (10) in the case that the top plate is in tension, and the general stud connector (9) is arranged in the case that the top plate is not in tension.

6. A new type of wind-resistant stable composite deck structure form according to claim 4, characterized in that, The closed section form bottom of the support negative bending moment area is filled with concrete (11), and the common stud connector (9) is installed on the concrete (11).

7. A new type of wind resistant stable composite deck structure form as claimed in claim 1, wherein, The guide plates (5) located on both sides of the maintenance channel (4) are inclined towards the maintenance channel (4), and the included angle between the two guide plates (5) is 20-40°.

8. A novel wind-resistant stable composite bridge deck structure construction method applied to the novel wind-resistant stable composite bridge deck structure form of any one of claims 1-7, the method comprising the following steps: Step one: hoisting and fixing the steel box girder (2), and connecting or field welding the steel box girder (2) segments by high-strength bolts; Step two: installing the common stud connector (9) and the pull-out non-shear connector (10); Step three: pouring the bottom concrete (11) of the support negative bending moment area; Step four: laying the prefabricated slab; Step five: pouring the cast-in-place layer concrete; Step six: installing the maintenance channel (4), and connecting the maintenance channel (4) to the bottom of the steel box girder (2) by high-strength bolts or field welding; Step seven: installing the guide plate (5), and fixing the guide plate (5) to the bottom of the steel box girder (2) by field welding; Step eight: after the cast-in-place layer concrete is initially set, installing the pneumatic grille guardrail (6); Step nine: supporting and pouring the central stabilizing plate (8); Step ten: installing the pneumatic wing plate (7) above the pneumatic grille guardrail (6).

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