Groove-shaped beam structure for man-vehicle separation

Abstract

The invention discloses a trough beam structure capable of separating pedestrians from vehicles, belongs to the field of bridge engineering, and solves the problems that the clearance below a bridge is difficult to meet the flood discharge requirement after the bridge is level-crossed with a dike, the noise and tail gas pollution of a motor vehicle lane is serious, and the pedestrian experience feeling is poor. A groove-shaped beam is of a groove-shaped structure formed by a bottom plate and web plates on the two sides of the bottom plate, cantilever plates are arranged on the two sides of the groove-shaped beam respectively, and bridge railings are arranged on the outer sides of the cantilever plates; the bottom plate is used for arranging a motorway, and the cantilever plate is used for arranging a sidewalk. By adopting the through channel beam structure and the cantilever slab overhanging structure, the height of the bridge building is effectively reduced, navigation and flood discharge clearance under the bridge are ensured, and roads on two banks do not need to be lifted; the webs on the two sides of the channel beam are used for conducting hard isolation on the sidewalk and the motorway, separation of people and vehicles is achieved, intersection possibly existing between a slow pedestrian space and the motorway is avoided, potential safety hazards are reduced, and noise and tail gas are isolated.

Description

Technical Field

[0001] The invention belongs to the field of bridge engineering, and in particular relates to a trough beam structure for separating people and vehicles. Background Art

[0002] The intersection of urban bridges and embankments mainly adopts two methods: level crossing and overpass. Large bridges and embankments are intersected by overpasses, while small and medium-sized bridges are often considered level crossing in their designs due to constraints such as investment and road connectivity. The design flood level of bridges and the flood control standards of embankments are usually inconsistent, with the former often higher than the latter. This makes it difficult for the clearance under the bridge to meet the flood discharge requirements after level crossing; even if the flood discharge requirements are met, it is difficult to meet the navigation function of small cruise ships. At the same time, most of the sidewalks and motor vehicle lanes on urban bridges are designed with a common plate. The noise and exhaust pollution of motor vehicle lanes are serious, the pedestrian experience is poor, and there are major safety hazards, which cannot meet the use requirements of riverside areas with high leisure and recreation requirements. Summary of the invention

[0003] The purpose of the present invention is to provide a trough beam structure that separates pedestrians and vehicles, so as to solve the problems that the clearance under the bridge is difficult to meet the flood discharge requirements after the bridge and the embankment are level, and the noise and exhaust pollution of the motor vehicle lane are serious, and the pedestrian experience is poor.

[0004] The technical solution of the present invention is: a trough beam structure for separating people and vehicles, the trough beam is composed of a bottom plate and webs on both sides thereof to form a trough structure, cantilever plates are respectively provided on both sides of the trough beam, and bridge railings are provided on the outside of the cantilever plates; the bottom plate position is used to set up a motor vehicle lane, and the cantilever plate position is used to set up a sidewalk.

[0005] As a further improvement of the present invention, end cross beams are commonly arranged below both ends of the trough beam and the cantilever plate, and the trough beam is arranged on the abutment through the end cross beams.

[0006] As a further improvement of the present invention, a shear key along the longitudinal direction of the bridge is provided at the bottom of the end cross beam, a reserved notch is opened on the top surface of the abutment, and the shear key is embedded in the reserved notch.

[0007] As a further improvement of the present invention, an anti-collision guardrail is provided on the side of the web facing the motor vehicle lane.

[0008] As a further improvement of the present invention, the anti-collision guardrail is integrally arranged with the web and the bottom plate, and transverse embedded steel bars and vertical embedded steel bars are provided in the anti-collision guardrail. The transverse embedded steel bars extend transversely to the inside of the web, and the vertical embedded steel bars extend downward to the inside of the bottom plate. The transverse embedded steel bars and the vertical embedded steel bars are connected to each other and are connected as a whole by the longitudinal embedded steel bars.

[0009] The beneficial effects of the present invention are: 1. The present invention adopts a through-type trough-shaped beam structure, and through the cantilever slab overhanging structure, the thickness of the bottom slab is controlled at about 50 cm, effectively reducing the bridge construction height, ensuring the navigation and flood discharge clearance under the bridge, and eliminating the need to raise the roads on both banks.

[0010] 2. The present invention sets the sidewalk through the cantilever slab overhanging, and uses the webs on both sides of the trough-shaped beam to hard-isolate the sidewalk and the motor vehicle lane, realizing the separation of people and vehicles, avoiding the possible intersection between the pedestrian slow-moving space and the motor vehicle lane, and reducing potential safety hazards; at the same time, it isolates noise and exhaust gas, improving the experience of pedestrians in the slow-moving space.

[0011] 3. The present invention uses the webs on both sides of the trough-shaped beam to block the noise during vehicle driving. Compared with the box girder structure, it will not generate box resonance noise, and to a certain extent, reduces the impact on the surrounding residents.

[0012] 4. The present invention improves the anti-collision grade of the guardrail by integrally setting the anti-collision guardrail, the web and the bottom slab; the impact surface of the anti-collision guardrail can dissipate the energy of vehicle impact, reducing the secondary injury caused by traffic accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is the elevation structure schematic diagram of the present invention; Figure 2 is the plan structure schematic diagram of the present invention; Figure 3 is Figure 1 the view A-A in Figure 4 is Figure 1 the view B-B in Figure 5 is the sectional view of the anti-collision guardrail in the present invention.

[0014] In the figures, 1, trough-shaped beam; 11, bottom slab; 12, web; 13, cantilever slab; 14, end cross beam; 15, shear key; 16, web groove; 2, abutment; 21, reserved notch; 3, bridge nameplate; 4, anti-collision guardrail; 41, impact surface; 42, transverse embedded steel bar; 43, longitudinal steel bar; 44, vertical embedded steel bar; 5, bridge railing; 6, navigable water level; 7, waterway. DETAILED DESCRIPTION OF THE INVENTION

[0015] The present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0016] Embodiment 1, As Figure 1-5As shown in the figure, a trough-shaped beam structure with separation of pedestrians and vehicles is provided. The trough-shaped beam 1 is composed of a bottom plate 11 and webs 12 on both sides thereof to form a trough-shaped structure. Cantilever plates 13 are respectively provided on both sides of the trough-shaped beam 1, and bridge railings 5 are provided outside the cantilever plates 13. The position of the bottom plate 11 is used to set the motor vehicle lane, and the position of the cantilever plate 13 is used to set the sidewalk.

[0017] End cross beams 14 are jointly provided below the two ends of the trough-shaped beam 1 and the cantilever plates 13, and the trough-shaped beam 1 is arranged on the abutment 2 through the end cross beams 14.

[0018] Shear keys 15 extending longitudinally along the bridge are provided at the bottom of the end cross beams 14, and reserved notches 21 are opened on the top surface of the abutment 2, and the shear keys 15 are embedded in the reserved notches 21.

[0019] Anti-collision guardrails 4 are provided on one side of the webs 12 facing the motor vehicle lane.

[0020] The anti-collision guardrails 4 are integrally provided with the webs 12 and the bottom plate 11. Transverse embedded steel bars 42 and vertical embedded steel bars 44 are provided inside the anti-collision guardrails 4. The transverse embedded steel bars 42 extend horizontally into the webs 12, and the vertical embedded steel bars 44 extend downward into the bottom plate 11. The transverse embedded steel bars 42 and the vertical embedded steel bars 44 are connected to each other and are connected into one body through longitudinal embedded steel bars 43.

[0021] The trough-shaped beam 1 is an upper structure that bears the loads of vehicles and pedestrians. A motor vehicle lane is provided inside the trough-shaped beam 1, and a sidewalk is provided outside. Two abutments 2 are arranged below the trough-shaped beam 1 to support the trough-shaped beam 1 to form a simply supported system. At the end of the trough-shaped beam 1 at the bridgehead, a 1 / 4 elliptical bridge nameplate 3 is provided, which is smoothly connected to the web 12, and the structure is avoided from being abrupt through linear gradual change. Anti-collision guardrails 4 are provided outside the motor vehicle lane to achieve the effect of anti-collision and energy dissipation. The present invention effectively reduces the bridge construction height, ensures that when the navigable water level 6 under the bridge is relatively high, the clearance of the waterway 7 can meet the requirements, and there is no need to raise the roads on both banks.

[0022] The trough-shaped beam 1 is a prestressed concrete simply supported trough-shaped beam structure with a span of 44 m and a transverse width of 14.6 m. The bottom plate 11 and the webs 12 form a U-shaped trough, and the inside of the trough is the motor vehicle lane, arranged with two-way two lanes. Cantilever plates 13 are longitudinally arranged outside the webs 12 and are used as sidewalks. Through the hard isolation of the webs 12, the separation of pedestrians and vehicles is realized.

[0023] The bottom plate 11 is arranged between two webs 12, with a thickness of 0.5 m, and is connected to the webs 12 through haunches of 50 cm × 15 cm. It is a member that directly bears the wheel pressure of vehicles, transfers the load to the webs 12, and plays a role in ensuring the integrity of the trough-shaped beam 1.

[0024] The web 12 is the main load-bearing member, and its main functions include resisting shear force and bearing part of the bending moment. It is arranged symmetrically horizontally and is connected as a whole by the bottom plate 11. The web 12 is 2.8 m high and 0.6 m thick, and the thickness is thickened to 0.8 m at the top. The outer surface of the web 12 is decorated with a web groove 16 with a circular curve, and the grooving depth is not less than 5 cm, making the concrete surface present a unique concave-convex texture and deep and shallow shadows, improving the experience of pedestrians in the slow-moving space.

[0025] The cantilever slab 13 is arranged outside the web 12 and is used as a sidewalk. The cantilever slab 13 is flush with the bottom plate 11, 2.7 m long and 0.5 m thick, and the root is connected to the web 12 through a haunch with a size of 50 cm × 15 cm.

[0026] End cross beams 14 are arranged at both ends of the trough-shaped beam 1 and the cantilever slab 13, which play a role in dispersing and bearing part of the load on the web 12. At the same time, the structural integrity is enhanced to ensure the stability of the beam body. A shear key 15 is arranged at the center line position of the bottom surface of the end cross beam 14. It is a cube with a size of 0.5 m (height) × 0.7 m (width) × 1.4 m (length) and is embedded in the reserved notch 21 of the abutment 2, effectively controlling the lateral relative displacement between the console and the beam, thereby reducing the lateral movement or fall of the beam body due to the action of seismic force.

[0027] The abutment 2 adopts a straight shape. Due to the existence of the shear key 15, the retaining blocks at both ends are cancelled. The body of the abutment 2 is the same width as the trough-shaped beam 1, which is 14.6 m; the back wall is 130 cm high and 50 cm thick. A 2 cm break joint is arranged at the position of the pile foundation on the back wall of the abutment 2 and is filled with asphalt hemp floss. The side wall of the abutment 2 is 50 cm thick. A 600 cm long approach slab with a thickness of 35 cm is arranged behind the abutment 2 and is arranged within the width range of the carriageway. The size of the bearing platform is 1510 × 520 × 200 cm, and 8 bored cast-in-place piles with a diameter of Φ1.2 m are arranged below, in a double row layout, with a transverse spacing of 430 cm and a longitudinal spacing of 300 cm. During the construction of the abutment 2, attention should be paid to the setting of the reserved notch 21, and a gap of 1 - 2 cm should be satisfied between the reserved notch 21 and the shear key 15.

[0028] The bridge nameplate 3 is arranged at the end of the trough-shaped beam 1 and is connected smoothly with the web 12. It adopts a reinforced concrete structure, and its outer surface is consistent with the web 12. A 2 cm break joint is reserved between the end and the web and is filled with asphalt hemp floss. The bridge nameplate 3 is 5 m long and is in a 1 / 4 elliptical shape, and is connected smoothly with the roadbed through a curve gradient.

[0029] An anti-collision guardrail 4 is provided on the outside of the motor vehicle lane and is integrally provided with the web 12 and the bottom plate 11. The impact-facing surface 41 of the anti-collision guardrail 4 adopts the SS-level anti-collision grade, achieving the effect of anti-collision and energy dissipation. When tying the steel mesh plate of the web 12, pay attention to the reservation of the horizontally embedded steel bars 42, and the anchorage length needs to meet the specification requirements. The horizontally embedded steel bars 42 are connected to the framework steel bars of the web 12. Similarly, the vertically embedded steel bars 44 are connected to the framework steel bars of the bottom plate 11. The longitudinal steel bars 43 are arranged longitudinally along the bridge and are tied to the horizontally embedded steel bars 42 and the vertically embedded steel bars 44. The anti-collision guardrail 4 can be cast synchronously with the web 12 or in multiple times.

[0030] The bridge railing 5 is arranged on the outside of the sidewalk and adopts a railing style with good permeability. While protecting the safety of pedestrians, it also plays a role in enhancing the overall landscape. The design of the cantilever slab 13 increases the structural level. In cooperation with the bridge railing 5 with good permeability and the decorative web groove 16, it overcomes the bulky appearance image of the concrete structure and enhances the urban landscape.

[0031] The bridge structure of the present invention guarantees the navigation and flood discharge clearance under the bridge, realizes the separation of people and vehicles, and improves the pedestrian experience, and has a wide application prospect.

Claims

1. A trough-shaped beam structure with separation of people and vehicles, characterized in that: The trough-shaped beam (1) is composed of a bottom plate (11) and webs (12) on both sides thereof to form a trough-shaped structure. Cantilever plates (13) are respectively provided on both sides of the trough-shaped beam (1), and bridge railings (5) are provided on the outer sides of the cantilever plates (13); the position of the bottom plate (11) is used to arrange the motor vehicle lane, and the position of the cantilever plate (13) is used to arrange the sidewalk.

2. The trough-shaped beam structure for separating people and vehicles according to claim 1, wherein: End cross beams (14) are jointly provided under the two ends of the trough-shaped beam (1) and the cantilever plates (13), and the trough-shaped beam (1) is arranged on the abutment (2) through the end cross beams (14).

3. The trough-shaped beam structure for separating people and vehicles according to claim 2, characterized in that: Shear keys (15) along the longitudinal bridge direction are provided at the bottom of the end cross beams (14), and reserved notches (21) are formed on the top surface of the abutment (2), and the shear keys (15) are embedded into the reserved notches (21).

4. A trough-shaped beam structure for separating people and vehicles according to any one of claims 1-3, characterized in that: Anti-collision guardrails (4) are provided on the side of the web (12) facing the motor vehicle lane.

5. A trough-shaped beam structure with separation of people and vehicles according to claim 4, characterized in that: The anti-collision guardrail (4) is integrally provided with the web (12) and the bottom plate (11). Transverse embedded steel bars (42) and vertical embedded steel bars (44) are provided inside the anti-collision guardrail (4). The transverse embedded steel bars (42) extend transversely into the inside of the web (12), and the vertical embedded steel bars (44) extend downward into the inside of the bottom plate (11). The transverse embedded steel bars (42) and the vertical embedded steel bars (44) are connected to each other and are integrated into one body through longitudinal embedded steel bars (43).

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