Bridge end transition section special-shaped wall type guardrail
Through the integrated structure of the special-shaped wall guardrail at the transition section of the bridge and the reinforced concrete guardrail at the bridge section, the problems of complex and high cost of installation of existing wing walls are solved, and the effect of simplifying construction and reducing construction costs is achieved.
Patent Information
- Application Number
- CN202323500628.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-21
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2033-12-21
AI Technical Summary
The existing bridge end wing wall structure is complex during installation, with a long construction period, and is not suitable for new or expanded highway projects, which increases construction difficulty and construction costs.
The special-shaped wall-type guardrail at the end of the bridge is adopted. By connecting the steel cage with the reinforced concrete guardrail of the bridge section, building formwork and pouring concrete, it forms an integrated structure, reducing the need for steel pipe piles to penetrate into the bridge body. .
It reduces the construction difficulty, simplifies the construction process, is suitable for new or expanded highway projects, reduces construction costs, and improves structural strength and stability.
Smart Images
Figure CN222206022U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of road protection engineering, in particular to a special-shaped wall guardrail at a transition section of a bridge end, which is mainly used for the transition connection between a bridge concrete guardrail and a roadbed corrugated beam guardrail, and is suitable for new construction or renovation and expansion of highway projects. Background Art
[0002] Highway bridges are traffic structures that cross wading, valleys and obstacles. Concrete guardrails are generally installed on both sides of the bridge to protect out-of-control vehicles in accordance with standard specifications. Guardrails are important safety facilities that are essential to ensure the safety and rapid operation of high-grade highways, and play an important role in reducing the number of traffic accidents and reducing the severity of accidents.
[0003] In the actual operation test for many years, the concrete guardrails of existing bridges have been through various accident vehicle collisions and have good safety protection capabilities, which can effectively protect vehicles. However, for the road-bridge transition section, most of the highway roadbed sections use double-wave beam or triple-wave beam guardrails, and near the end of the bridge, the roadbed section corrugated beam guardrail is set at the end of the road-bridge transition section guardrail, which is generally in the form of cast-in-place or prefabricated reinforced concrete wing wall.
[0004] Cast-in-place or precast reinforced concrete wing wall structures such as Figure 1 As shown, the end wing wall is set at the ear wall section of the bridge, and adopts a special-shaped wall structure with variable cross-sectional dimensions. The wing wall is 3m long, 1.2m high (1.1m above the asphalt pavement), 52.5cm wide at the bottom, and a 102.5cm×80cm×9cm notch is set at the end. The corrugated beam guardrail can be extended into the notch and anchored in the notch with expansion bolts. The wing wall adopts a steel pipe pile foundation with a diameter of φ140mm, a wall thickness of 4.5mm, and a length of 120cm (95cm below the pavement and 25cm above the pavement). There are three operation modes for installing this type of wing wall:
[0005] 1. If the reinforced concrete guardrails and ear walls of an in-service highway bridge are arranged in a straight line, then during the installation of this type of wing wall, the external concrete structure of the ear wall needs to be chiseled out to expose the internal steel bars of the ear wall; the wing wall structural steel bars and the ear wall structural steel bars are connected into a whole by embedding steel bars, and then concrete is poured to form a whole with the wing wall and ear wall structure.
[0006] 2. If the reinforced concrete guardrail of the in-service highway bridge is not in a straight line with the ear wall, and the bridgehead slab does not extend to the ear wall, then this type of wing wall needs to be installed by driving steel pipe piles between the ear wall and the bridgehead slab, and then pouring concrete.
[0007] 3. If the reinforced concrete guardrail of the in-service highway bridge is not in a straight line with the ear wall, and the bridgehead slab extends to the ear wall, then when installing this wing wall, it is necessary to completely remove the 50 cm external concrete structure on both sides of the bridgehead slab to expose the internal steel bars of the slab. At the place where steel pipe piles need to be buried, the steel bars are cut and reinforced, and then the steel pipe piles are buried in the reserved holes, and continue to press down to the predetermined depth of the roadbed before re-pouring concrete.
[0008] The above three situations have complicated procedures and long construction periods. The end wing wall structure is more suitable for upgrading and renovating the safety facilities of in-service highways, and does not require modification of the original reinforced concrete guardrails of the bridge. For new or expanded highway projects, the use of the above independent wing wall structure will undoubtedly increase the construction difficulty and construction cost. Utility Model Content
[0009] In view of the technical problems that the existing wing walls are difficult to construct and are not suitable for new construction or renovation and expansion of highway projects, the present technical solution provides a special-shaped wall guardrail at the transition section of the bridge end, which is arranged at the bridge section and is mainly used for the transition connection between the bridge concrete guardrail and the roadbed corrugated beam guardrail; during construction, the transition section guardrail is connected with the bridge body guardrail together with the steel cage, the formwork is built together, and the concrete is poured together, so that the transition section guardrail and the bridge section reinforced concrete guardrail form an integrated structure with higher structural strength and better structural stability; it is more suitable for new construction or renovation and expansion of highway projects; at the same time, during construction, there is no need to drive steel pipe pile structures into the interior of the bridge body, which reduces the construction difficulty compared to conventional end wing walls, facilitates construction and reduces the construction cost of new construction or renovation and expansion of highway projects, with higher economic benefits; it can effectively solve the above problems.
[0010] The utility model is realized by the following technical solutions:
[0011] A special-shaped wall guardrail at a transition section at the end of a bridge, comprising a connecting section arranged at the end of the bridge and connected to the reinforced concrete guardrail at a general section of the bridge, a connecting section connected to a guardrail plate, and a transition section arranged between the connecting section and the connecting section; the reinforced concrete guardrail at the general section of the bridge and the connecting section, the transition section and the connecting section are cast into an integrated structure using reinforced concrete; a special-shaped wall structure with varying cross-sectional dimensions is adopted from the connecting section to the transition section, and a notch for fixing the corrugated beam guardrail plate is provided from the middle to the end of the connecting section.
[0012] Furthermore, the connecting section, transition section and linking section are tied together with the internal steel cage of the reinforced concrete guardrail of the general section of the bridge, and then cast as a whole with concrete, and the outer surface layer of the concrete is at least 6 cm away from the outermost steel bars of the steel cage.
[0013] Furthermore, the bottom beam of the steel cage of the reinforced concrete guardrail of the connecting section, transition section and connecting section and the general section of the bridge is buried on the upper side of the precast beam of the bridge and at a position 20 to 30 centimeters below the road surface.
[0014] Furthermore, the upper side of the precast bridge beam is paved with a cast-in-place concrete layer and an asphalt concrete layer in sequence from bottom to top; the legs of the connecting section, transition section, connecting section and the reinforced concrete guardrail of the general section of the bridge located on the outside of the precast bridge beam extend to the bottom of the precast beam and wrap the edge of the precast beam, and the legs of the connecting section, transition section and connecting section and the reinforced concrete guardrail of the general section of the bridge located on the inside of the precast bridge beam extend to the cast-in-place concrete layer of the bridge deck.
[0015] Furthermore, the total height of the reinforced concrete guardrail of the connecting section, transition section, connecting section and the general section of the bridge is 1.2 meters, which is 1.1 meters higher than the bridge pavement; the width of the bottom base of the reinforced concrete guardrail of the connecting section, transition section, connecting section and the general section of the bridge is 52.5 cm, the width from the connecting section to the top of the transition section gradually increases, the width of the top of the transition section is the same, and the width of the top of the connecting section is less than the width of the top of the transition section by the depth of the notch.
[0016] Furthermore, the width from the connecting section to the transition section is set according to a ratio of 12.3+n×1.94, and the unit of the width is centimeters.
[0017] Furthermore, the length, height and thickness of the notch are determined according to the strength, height and thickness of the corrugated beam guardrail plate, respectively.
[0018] Furthermore, the corrugated beam guardrail plate extends into the slot and is fixed in the slot by fasteners.
[0019] Furthermore, the fasteners are expansion bolts to anchor the corrugated beam guardrail plate in the notch.
[0020] Beneficial Effects
[0021] The utility model provides a special-shaped wall-type guardrail for the transition section of a bridge end, which has the following beneficial effects compared with the prior art:
[0022] (1) The transition section special-shaped wall guardrail of the technical solution is set in the bridge section and is mainly used for the transition connection between the bridge concrete guardrail and the roadbed corrugated beam guardrail. During construction, the transition section guardrail and the bridge guardrail are connected together with the steel cage, the formwork is built together, and the concrete is poured together, so that the transition section guardrail and the bridge section reinforced concrete guardrail form an integrated structure with higher structural strength and better structural stability. It is more suitable for new construction or renovation and expansion of highway projects. At the same time, during construction, there is no need to drive steel pipe pile structures into the interior of the bridge body, which reduces the construction difficulty compared to conventional end wing walls, facilitates construction and reduces the construction cost of new construction or renovation and expansion of highway projects, and has higher economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 It is a schematic diagram of the overall structure of the existing wing wall in the background technology.
[0024] Figure 2 It is a schematic diagram of the application state of the overall structure of the utility model on the bridge.
[0025] Figure 3 It is the front view of the overall structure of the utility model.
[0026] Figure 4 It is a right view of the overall structure of the utility model.
[0027] Figure 5 It is a left view of the overall structure of the utility model.
[0028] Figure 6 It is a top view of the overall structure of the utility model.
[0029] Figure 7 It is a vertical view showing the steel reinforcement frame in the overall structure of the utility model.
[0030] Figure 8 yes Figure 7 AA cross-section diagram.
[0031] Fig. 9 yes Figure 7 BB cross-section diagram.
[0032] Fig.10 It is a schematic diagram showing the top surface steel reinforcement frame in the overall structure of the utility model.
[0033] Fig.11 yes Fig.10 Detail of the steel frame.
[0034] Fig.12 It is a schematic diagram showing the bottom steel reinforcement frame in the overall structure of the utility model.
[0035] Fig.13 yes Fig.12 Detail of the steel frame.
[0036] Markings and component annotations in the attached drawings: 1-reinforced concrete guardrail of general section of bridge, 2-guardrail plate, 3-special-shaped wall guardrail of transition section, 31-connecting section, 32-transition section, 33-connecting section, 4-slot, 5-expansion bolt, 6-precast beam of bridge, 7-cast-in-place concrete layer, 8-asphalt concrete layer. DETAILED DESCRIPTION
[0037] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.
[0038] like Figures 2 to 6 As shown, a special-shaped wall guardrail of a transition section at the end of a bridge includes a connecting section 31 arranged at the end of the bridge and connected with the reinforced concrete guardrail 1 of the general section of the bridge, a connecting section 33 connected to the guardrail plate 2, and a transition section 32 arranged between the connecting section 31 and the connecting section 33; the reinforced concrete guardrail 1 of the general section of the bridge and the connecting section 31, the transition section 32 and the connecting section 33 are cast into an integrated structure with reinforced concrete; the connecting section 31 to the transition section 32 adopts a special-shaped wall structure with a variable cross-sectional size, and the middle to the end of the connecting section 33 is provided with a notch 4 for fixing the corrugated beam guardrail plate 2, the corrugated beam guardrail plate 2 extends into the notch 4, and the corrugated beam guardrail plate 2 is anchored in the notch by an expansion bolt 5.
[0039] like Figures 7 to 9 As shown, the connecting section 31, transition section 32 and connecting section 33 are connected to the inner steel cage of the general section reinforced concrete guardrail 1 of the bridge as a whole, and then cast in one piece by concrete, and the outer surface of the concrete is at least 6 cm away from the outermost steel bars of the steel cage. The length, height and thickness of the notch 4 are determined according to the strength, height and thickness of the corrugated beam guardrail plate 2.
[0040] The total height of the connecting section 31, the transition section 32, the connecting section 33 and the general section reinforced concrete guardrail 1 of the bridge is 1.2 meters, which is 1.1 meters higher than the bridge pavement 8 (in this embodiment, the asphalt pavement).
[0041] The bottom beam of the connecting section 31, transition section 32 and connecting section 33 and the steel cage of the reinforced concrete guardrail 1 of the general section of the bridge is buried on the upper side of the prefabricated bridge beam 6 and at a position 20 cm to 30 cm below the road surface 8. In this embodiment, it is 25 cm. Figure 8 and Fig. 9 shown.
[0042] The upper side of the precast bridge beam 6 is paved with a cast-in-place concrete layer 7 and an asphalt concrete layer 8 in sequence from bottom to top; the connecting section 31, the transition section 32 and the connecting section 33 and the reinforced concrete guardrail 1 of the general section of the bridge are located on the outside of the precast bridge beam 6, extending to the bottom of the precast beam 6 and wrapping the edge of the precast beam 6, and the connecting section 31, the transition section 32 and the connecting section 33 and the reinforced concrete guardrail 1 of the general section of the bridge are located on the inside of the precast bridge beam 6 and extend to the cast-in-place concrete layer 7 of the bridge deck.
[0043] like Fig.10 As shown, the width of the connecting section 31 to the top of the transition section 32 gradually increases, the width of the top of the transition section 32 is the same, and the width of the top of the connecting section 33 is less than the width of the top of the transition section 32 by the depth of the notch 4. Fig.11 As shown, the width from the connecting section 31 to the transition section 32 is set according to a ratio of 12.3+n×1.94, and the unit of the width is centimeters.
[0044] like Fig.12 As shown, the width of the bottom base of the connecting section 31, transition section 32 and connecting section 33 and the general section of the bridge reinforced concrete guardrail 1 is 52.5 cm. Fig.13 shown.
Claims
1. A special-shaped wall guardrail at the transition section of a bridge end, characterized in that: The invention comprises a connecting section (31) arranged at the end of a bridge and connected to a reinforced concrete guardrail (1) of a general section of the bridge, a connecting section (33) connected to a guardrail plate (2), and a transition section (32) arranged between the connecting section (31) and the connecting section (33); the general section reinforced concrete guardrail (1) of the bridge, the connecting section (31), the transition section (32) and the connecting section (33) are cast into an integrated structure using reinforced concrete; the connecting section (31) to the transition section (32) adopts a special-shaped wall structure with a variable cross-sectional size, and a notch (4) for fixing the corrugated beam guardrail plate (2) is arranged from the middle to the end of the connecting section (33).
2. The bridge end transition section special-shaped wall guardrail according to claim 1, characterized in that: The connecting section (31), transition section (32) and connection section (33) are connected to the inner steel cage of the general section reinforced concrete guardrail (1) of the bridge as a whole and then cast in one piece with concrete, wherein the outer surface of the concrete is at least 6 centimeters away from the outermost steel bars of the steel cage.
3. The bridge end transition section special-shaped wall guardrail according to claim 2, characterized in that: The bottom beam of the connecting section (31), transition section (32) and connecting section (33) and the steel cage of the general section reinforced concrete guardrail (1) of the bridge is buried on the upper side of the prefabricated bridge beam (6) and at a position 20 to 30 cm below the road surface.
4. The bridge end transition section special-shaped wall guardrail according to claim 3, characterized in that: The upper side of the precast bridge beam (6) is paved with a bridge deck cast-in-place concrete layer (7) and an asphalt concrete layer (8) in sequence from bottom to top; the connecting section (31), the transition section (32) and the connecting section (33) and the bridge general section reinforced concrete guardrail (1) are located on the outer side of the precast bridge beam (6) and extend to the bottom of the precast bridge beam (6) and wrap around the edge of the precast bridge beam (6); the connecting section (31), the transition section (32) and the connecting section (33) and the bridge general section reinforced concrete guardrail (1) are located on the inner side of the precast bridge beam (6) and extend to the bridge deck cast-in-place concrete layer (7).
5. A bridge end transition section special-shaped wall guardrail according to claim 1 or 4, characterized in that: The total height of the connecting section (31), the transition section (32) and the connecting section (33) and the reinforced concrete guardrail (1) of the general section of the bridge is 1.2 meters, which is 1.1 meters higher than the bridge road surface; the width of the bottom base of the connecting section (31), the transition section (32) and the connecting section (33) and the reinforced concrete guardrail (1) of the general section of the bridge is 52.5 cm, the width from the connecting section (31) to the top of the transition section (32) gradually increases, the width of the top of the transition section (32) is the same, and the width of the top of the connecting section (33) is less than the width of the top of the transition section (32) by the depth of the notch (4).
6. The bridge end transition section special-shaped wall guardrail according to claim 5, characterized in that: The width from the connecting section (31) to the transition section (32) is set according to a ratio of 12.3+n×1.94, and the unit of the width is centimeters.
7. The bridge end transition section special-shaped wall guardrail according to claim 1, characterized in that: The length, height and thickness of the notch (4) are determined according to the strength, height and thickness of the corrugated beam guardrail plate (2), respectively.
8. The bridge end transition section special-shaped wall guardrail according to claim 1 or 7, characterized in that: The corrugated beam guardrail plate (2) extends into the notch (4) and is fixed in the notch (4) by fasteners.
9. The bridge end transition section special-shaped wall guardrail according to claim 8, characterized in that: The fasteners are expansion bolts (5) for anchoring the corrugated beam guardrail plate (2) in the notch (4).