Bridge anti-collision guardrail
By using a combination structure of modified asphalt material and cast iron drain pipes in the bridge anti-collision guardrail, the problems of weak concrete anti-collision guardrail structure and waste of resources were solved, and the dual effects of structural stability and environmental protection were achieved.
Patent Information
- Application Number
- CN202422498260.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-16
- Publication Date
- 2025-09-30
- Estimated Expiration
- 2034-10-16
AI Technical Summary
The existing concrete anti-collision guardrail has a weak structure, poor stability, and is easily damaged. It is prone to breakage after long-term use, resulting in serious waste of resources and affecting traffic safety and the environment.
The structure adopts a combined structure of a gravel layer paved with SBS modified mastic asphalt, an SBS modified asphalt concrete seal coat, an SBS modified emulsified asphalt tack coat and an SBS modified asphalt waterproof coating waterproof layer. The original road milling material is used as a cushion layer in the reinforcement layer outside the guardrail, combined with a cast iron drain pipe and reflective paint design to enhance structural stability and drainage capacity.
It improves the structural strength and stability of the bridge anti-collision guardrail, reduces the occurrence of damage, reduces construction costs, reduces the emission of construction waste, protects the environment, and ensures road traffic safety.
Smart Images
Figure CN223398045U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of anti-collision guardrail construction engineering, in particular to a bridge anti-collision guardrail. Background Art
[0002] Bridge crash barriers are guardrails installed on bridges. Their purpose is to prevent uncontrolled vehicles from crossing the bridge. They also prevent vehicles from breaking through, passing under, or climbing over the bridge, and enhance the aesthetics of the bridge structure. Bridge crash barriers are typically constructed from materials such as rebar, concrete, steel, and aluminum alloy. The strength of concrete crash barriers directly impacts vehicle safety.
[0003] However, existing concrete anti-collision guardrail structures generally have the following difficulties and shortcomings during construction and use:
[0004] 1. The reinforcement structure of the anti-collision guardrail is not laid firmly and has poor stability, which can easily cause the anti-collision guardrail to deform or be damaged, posing a traffic safety hazard.
[0005] 2. After long-term use, including water erosion, the anti-collision guardrail is prone to local damage, cracking, collapse and other damages to the concrete structure due to its low internal strength.
[0006] 3. The use of traditional concrete filling cannot effectively recycle resources, resulting in waste of resources and adverse effects on the environment.
[0007] 4. The existing concrete anti-collision guardrail requires a large amount of concrete paving, which puts pressure on concrete raw material resources and is not in line with the concept of sustainable development. Utility Model Content
[0008] In view of this, the purpose of the present invention is to design a bridge anti-collision guardrail, improve the structural strength and stability of the bridge anti-collision guardrail, thereby improving the stability and durability of the anti-collision guardrail structure, reducing the occurrence of damage, and benefiting road driving safety; by laying a drainage pipe at the intersection of the bottom of the bridge anti-collision guardrail and the bridge deck road structure layer, it is beneficial to the drainage of the bridge road; and simplifying the process, using the original road surface milling material for the construction of the outer reinforcement layer cushion layer of the guardrail, the construction is simple and easy, the cost is reduced, and the emission of construction waste is reduced, pollution is reduced, and the environment is protected.
[0009] The utility model provides a bridge anti-collision guardrail, which is arranged above the bridge deck road structure layer, and includes: a guardrail wall and a guardrail outer reinforcement layer arranged in sequence along the direction away from the center line of the road route; wherein the guardrail outer reinforcement layer includes: a cushion layer, a waterproof layer, a sealing layer, a sticky layer, and a gravel layer arranged in sequence from bottom to top; the gravel layer is paved with SBS modified asphalt mastic gravel, the sealing layer is paved with SBS modified asphalt concrete, the sticky layer is paved with SBS modified emulsified asphalt as the sticky layer oil, the waterproof layer is paved with SBS modified asphalt waterproof coating, and the cushion layer is paved with C50 concrete or original road milling material. The original road milling material is a water-stabilized stone mixture scraped off by a milling machine from the original damaged cement-stabilized gravel road surface, which is used as the backfill material of the original road surface and used as the cushion material, making full use of the old material and reducing the discharge of construction waste, saving both cost and pollution, and being beneficial to energy conservation and environmental protection.
[0010] Preferably, the bridge anti-collision guardrail is symmetrical on both sides with the center line of the road as the symmetry axis.
[0011] Preferably, the thickness of the gravel layer is 4 cm, the thickness of the sealing layer is 6 cm, and the thickness of the cushion layer is 15 cm.
[0012] The role of crash barriers in road safety facilities cannot be underestimated. They not only effectively prevent vehicles from running off the road but also mitigate injuries to occupants in the event of a collision. However, to fully realize the effectiveness of crash barriers, the stability of the guardrail's outer reinforcement layer must be ensured. Laying the outer reinforcement layer is a critical step in ensuring guardrail stability and safety. By selecting appropriate cushioning materials, strictly controlling construction quality, and strengthening maintenance management, we ensure that the outer reinforcement layer of the guardrail meets design requirements, providing a strong guarantee for road safety.
[0013] When laying the guardrail's outer reinforcement layer, it should be laid in layers according to design requirements, with each layer's thickness and slope meeting specified requirements. The cushion layer, as the foundation for the guardrail's outer reinforcement layer, plays a critical role in ensuring the guardrail's stability and safety. During the laying process, the cushion layer's density and smoothness should be carefully controlled to avoid voids and unevenness. Furthermore, the connection between the cushion layer and the road structure should be strengthened to ensure a tight connection.
[0014] Furthermore, the guardrail wall is provided with multiple vertical grooves arranged at even intervals, preferably at intervals of 2 meters. These grooves are formed using a pre-set arc-shaped punch. These grooves increase friction and prevent slipping, absorbing impact during collisions. The use of pre-set arc-shaped punches, rather than post-cutting, enhances the structural strength of the guardrail wall.
[0015] Furthermore, multiple drain pipes are evenly spaced at the junction of the bottom of the bridge anti-collision guardrail and the bridge deck road structure layer. Installing drain pipes at the intersection of the bridge anti-collision guardrail and the bridge deck can solve the bridge drainage problem and improve safety and durability.
[0016] Furthermore, the drain pipe is a cast iron circular pipe, and all parts of the cast iron circular pipe except the water inlet and outlet are sealed. Cast iron material is high in strength and corrosion-resistant, the circular pipe design allows for rapid drainage, and the sealing ensures smooth water flow.
[0017] Furthermore, the inner side of the guardrail wall (the side facing the centerline of the road) is painted with yellow and black reflective paint. The yellow color, a representative warning color, is paired with black to create a striking and non-monotonous effect, providing drivers with directional guidance and warnings, avoiding driving risks caused by blurred vision.
[0018] Furthermore, the line width and spacing of the yellow and black reflective paint are both 15 cm, and are inclined at a 45° angle toward the lane. The line width, spacing, and inclination angle are set to facilitate drivers to clearly see the guardrail wall and the driving route.
[0019] Furthermore, the cross-section of the guardrail wall is such that the lower width is 2-3 times the upper width, and the height is 1.8-2 times the lower width, so as to enhance the structural stability of the guardrail wall.
[0020] For example, the height of the guardrail wall is 90 cm, the width of the upper end of the cross section is 20 cm, and the width of the lower end is 48.3 cm.
[0021] Furthermore, stone chips are filled between the outer side of the guardrail wall (the side away from the center line of the road route) and the cushion layer.
[0022] Stone chips, as a backfill material, are highly malleable and can effectively fill irregular spaces. They also provide sufficient support to prevent deformation. Stone chips filter seepage, preventing damage to the outer reinforcement layer of the guardrail and buffering lateral impact forces on the bottom of the guardrail wall.
[0023] Furthermore, the outer reinforcement layer of the guardrail has a transverse slope of 1.5°-2° descending toward the road edge. The transverse slope is designed to facilitate the rapid removal of water flow on the bridge deck.
[0024] Furthermore, the inner diameter of the drain pipe is φ14-φ16 cm, and the wall thickness of the circular pipe is 0.4-0.6 cm, thereby ensuring that the drain pipe has sufficient structural strength while reducing its own weight and lowering the load on the road structure layer.
[0025] Compared with the existing technology, the beneficial effects of the bridge anti-collision guardrail of the utility model are:
[0026] The bridge anti-collision guardrail provided by the utility model has a simple and reasonable structure and strong integrity, improves the structural strength and stability of the bridge anti-collision guardrail, ensures the stability and durability of the anti-collision guardrail structure, reduces the occurrence of damage, and is beneficial to road driving safety; by evenly arranging drainage pipes at the intersection of the bottom of the bridge anti-collision guardrail and the bridge deck road structure layer, it is beneficial to the drainage of the bridge road; and simplifies the process, and the original road surface milling material is used for the construction of the reinforcement layer cushion layer outside the guardrail, the construction is simple and easy, the cost is reduced, and the emission of construction waste is reduced, which reduces pollution and protects the environment. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present invention. The same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:
[0028] Figure 1 This is a schematic diagram of the elevation structure of the bridge anti-collision guardrail according to an embodiment of the present utility model;
[0029] Figure 2 This is a schematic diagram of the planar structure of the bridge anti-collision guardrail according to an embodiment of the present utility model;
[0030] Figure 3 AA cross-sectional structural diagram of a bridge anti-collision guardrail according to an embodiment of the present invention;
[0031] Figure 4 BB is a schematic cross-sectional structure diagram of a bridge anti-collision guardrail according to an embodiment of the present invention;
[0032] Figure 5 It is a partial large-scale drawing of the groove of the large-scale drawing 1 in the elevation structure schematic diagram of an embodiment of the utility model;
[0033] Figure 6 This is a CC cross-sectional view of the groove of an embodiment of the present utility model;
[0034] Figure 7 This is a large-scale drawing of the drain pipe according to an embodiment of the present utility model.
[0035] The symbols in the accompanying drawings are:
[0036] 1. Guardrail wall, 2. Guardrail outer reinforcement layer, 21. Gravel layer, 22. Adhesive layer, 23. Sealing layer, 24. Waterproof layer, 25. Cushion layer, 3. Groove, 4. Drain pipe, 5. Bridge deck road structure layer, 6. Stone chips. DETAILED DESCRIPTION
[0037] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, unless there is a conflict, the embodiments of the present invention and the features described in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.
[0038] In the description of the present invention, it should be noted that the terms "inside" and "outside" etc. indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0039] In the description of this utility model, it should be noted that, unless otherwise specified or limited, the term "connection" should be understood in a broad sense. For example, it can mean a fixed connection, a detachable connection, or an integral connection; it can mean a mechanical connection or an electrical connection; it can mean a direct connection, an indirect connection through an intermediate medium, or a connection between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to the specific circumstances.
[0040] The following is a detailed description of the embodiments of the present invention with reference to the accompanying drawings:
[0041] The utility model provides a bridge anti-collision guardrail, which is arranged above the bridge deck road structure layer. Figure 1 、 2 As shown, the structure comprises a guardrail wall 1 and an outer guardrail reinforcement layer 2, arranged sequentially away from the road centerline. The outer guardrail reinforcement layer comprises, from bottom to top, a cushion layer 25, a waterproof layer 24, a seal layer 23, an adhesive layer 22, and a gravel layer 21. The gravel layer 21 is paved with SBS-modified mastic asphalt and has a thickness of 4 cm. The seal layer 23 is paved with SBS-modified asphalt concrete and has a thickness of 6 cm. The adhesive layer 22 uses SBS-modified emulsified asphalt as the adhesive layer oil. The waterproof layer 24 is paved with SBS-modified asphalt waterproofing coating. The cushion layer 25 is paved with C50 concrete or original road milling material and has a thickness of 15 cm. Backfilling the original road milling material as the cushion layer 25 fully utilizes waste material and reduces the discharge of construction waste. The bridge crash barrier is symmetrical on both sides with the road centerline as the axis of symmetry.
[0042] A vertical groove 3 is provided on the surface of the guardrail wall 1 every 2 m (see Figure 1 As shown in the figure, the groove 3 is formed by a preset arc-shaped punch instead of later cutting, which improves the structural strength of the guardrail wall 1. The groove 3 increases the friction and anti-slip, and can absorb the impact force during collision. The shape and size of the groove 3 are as follows Figure 5 、 Figure 6 shown.
[0043] At the junction of the bottom of the bridge anti-collision guardrail and the bridge deck road structure layer 5, 20 drainage pipes 4 are evenly spaced 300cm apart, solving the bridge drainage problem and improving safety and durability. The drainage pipes 4 are made of cast iron round pipes, and all parts of the cast iron round pipes are sealed except for the water inlet and outlet. Cast iron material has high strength and corrosion resistance, the round pipe design drains water quickly, and the sealing treatment ensures smooth water flow. Figure 7 As shown, the inner diameter of the drain pipe 4 is φ15 cm, and the wall thickness of the circular pipe is 0.5 cm, which ensures that the drain pipe 4 has sufficient structural strength while reducing its own weight and reducing the load on the bridge deck road structure layer 5.
[0044] The inner side of the guardrail wall 1 (the side facing the centerline of the roadway) is painted with yellow and black reflective paint. This paint provides drivers with directional guidance and warnings, preventing driving risks caused by blurred vision. The lines and spacing of the yellow and black reflective paint are both 15 cm wide and 15 cm apart, and are tilted at a 45° angle toward the roadway. This line width, spacing, and tilt angle ensure that drivers can clearly see the guardrail wall and the roadway.
[0045] The cross section of the guardrail wall 1 is such that the lower width is 2-3 times the upper width and the height is 1.8-2 times the lower width, which enhances the structural stability of the guardrail wall 1. Figure 3 、 Figure 4 As shown, the guardrail wall 1 of this embodiment has a height of 90 cm, a cross-sectional width of 20 cm at the top, and 48.3 cm at the bottom. Stone chips 6 are packed between the outer side of the guardrail wall 1 (the side away from the road centerline) and the cushion layer 25. The stone chips 6 filter seepage water, preventing it from corroding and damaging the outer reinforcement layer 2 of the guardrail, and also cushion the bottom of the guardrail wall 1 from lateral impact forces.
[0046] The outer reinforcement layer 2 of the guardrail has a transverse slope of 1.5°-2° descending towards the road edge in the AA section and the BB section, respectively, to facilitate the rapid removal of water flow on the bridge deck.
[0047] Application Examples
[0048] Anti-collision guardrail construction:
[0049] (1) The anti-collision guardrail is laid out to ensure the net width of the bridge deck, and the guardrail inspection line is popped up during the layout.
[0050] (2) Construction of steel bar binding and marking.
[0051] (3) The embedded parts of the guardrail are accurately positioned, firmly welded, and fit tightly against the inner surface of the formwork.
[0052] (4) A groove (false joint) is set every 2m. The groove starts from the expansion joint and a 2mm thick high-strength PVC board is buried in the groove. The steel bars must not be cut. The template and the groove are preset with an arc-shaped punch. The false joint must not be cut manually after pouring.
[0053] (5) Angle steel leveling templates are used on the inside and outside of the guardrail; when the outside needs to be leveled, high-grade mortar is used for leveling.
[0054] (6) Use pull wires and pull rods to adjust the template line shape to ensure that the line shape of the curved bridge is smooth and there are no obvious corners.
[0055] (7) Use standard steel molds for the reserved holes at the locations of horizontal drain pipes and expansion joints.
[0056] (8) The guardrail concrete pouring shall strictly follow the layered pouring process; the top surface shall be smoothed with a steel trowel.
[0057] (9) The steel plate cover installed at the expansion joint of the guardrail is firmly welded to the embedded parts of the guardrail, and is treated with anti-rust paint that is the same color as the concrete guardrail.
[0058] (10) Anti-corrosion paint is applied to the inner side of the guardrail 30-50 cm above the top of the road surface for anti-corrosion treatment.
[0059] Key points for construction of anti-collision guardrail:
[0060] (1) The elevation measurement of the anti-collision guardrail is controlled by the elevation of the top surface of the guardrail.
[0061] (2) The top surface of the guardrail is calendered. Each time the guardrail formwork is removed, the concrete on the top of the guardrail formwork is cleaned and polished to ensure that there will be no burrs on the corners of the top surface of the guardrail when it is used again.
[0062] (3) Guardrail steel bars and embedded steel bars are effectively welded to ensure welding quality.
[0063] (4) Use a special release agent to ensure that the concrete has a uniform color and a smooth surface.
[0064] (5) Before installing the formwork, clean up the loose concrete within the guardrail range; when installing the formwork, pay attention to the reservation of embedded parts, horizontal drain grooves and expansion joint installation notches.
[0065] (6) Concrete is poured in multiple layers and manually placed. The first layer cannot exceed the variable section position. Vibration should be strengthened on the curved surface to reduce the occurrence of bubbles.
[0066] (7) Concrete curing is done by covering with a cloth and a plastic (a layer of geotextile and a layer of plastic material composited by heat sealing or bonding) and sprinkling water.
[0067] Prevention and treatment of quality problems of anti-collision guardrails:
[0068] (1) Before using the template, polish it thoroughly and apply a proper amount of special release agent evenly.
[0069] (2) Strictly control the concrete mix ratio, especially the water-cement ratio. The amount of cement should not be too large to avoid cracking after completion.
[0070] (3) Strictly control the slump and workability of concrete.
[0071] (4) Pour in layers, strengthen vibration, and avoid excessive vibration.
[0072] (5) Seal the bottom of the formwork tightly with mortar, check the rebound rubber strips at the joints between the formworks to ensure that the joints are tight; ensure that the end plate has sufficient rigidity, seal the joints between the end plate and the guardrail formwork tightly, and ensure that the formwork is firmly supported.
[0073] Drain pipe construction:
[0074] (1) Drain pipe castings shall be treated with anti-corrosion treatment before installation.
[0075] (2) Determine the installation location: Before installing the drain pipe, determine the specific installation location to facilitate the discharge of rainwater and alleviate external impact.
[0076] (3) Reserve a hole: After determining the installation location, use an electric hammer or hand tools to reserve a hole of the corresponding size at the installation location to facilitate subsequent installation.
[0077] (4) Fixing bracket: Use expansion bolts or directly weld the bracket of drain pipe at the reserved hole position.
[0078] (5) Install the drain pipe: After fixing the bracket, insert one end of the drain pipe into the bracket and connect the other end to the drainage pipe.
[0079] (6) Welding: Weld the drain pipe to the bracket to ensure a firm and reliable connection.
[0080] (7) Testing and acceptance: After the installation is completed, necessary water pressure tests shall be carried out to test the drainage flow and whether there is leakage. The equipment can only be used after passing the acceptance test.
[0081] Key points for drain pipe construction:
[0082] (1) The horizontal drain pipe should be buried according to the designed slope. The water inlet should be slightly lower than the top of the road surface by 3mm. The horizontal drain pipe should extend at least 5mm beyond the outer edge of the bridge anti-collision guardrail. Vertical elbows are preferred.
[0083] (2) The gaps around the drain pipe castings shall be sealed with high-grade mortar and cement slurry shall not be used for sealing.
[0084] (3) Vertical drain pipes should be pre-buried with pipes of the same outer diameter as the horizontal drain pipes. Do not use a water drill to expand the hole. The water inlet of the vertical drain pipe should be slightly lower than the top of the road surface by at least 3mm, and the gap should be sealed with high-strength mortar.
[0085] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.
[0086] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.
Claims
1. A bridge anti-collision guardrail, characterized in that: It is arranged above the bridge deck road structure layer, including: a guardrail wall and a guardrail outer reinforcement layer arranged in sequence along the direction away from the center line of the road route; wherein, the guardrail outer reinforcement layer includes: a cushion layer, a waterproof layer, a sealing layer, an adhesive layer, and a crushed stone layer arranged in sequence from bottom to top; the crushed stone layer is paved with SBS modified asphalt mastic macadam, the sealing layer is paved with SBS modified asphalt concrete, the adhesive layer is paved with SBS modified emulsified asphalt as the adhesive layer oil, the waterproof layer is paved with SBS modified asphalt waterproof coating, and the cushion layer is paved with C50 concrete or original road surface milling material.
2. The bridge anti-collision guardrail according to claim 1, characterized in that: A plurality of vertical grooves arranged at even intervals are provided on the surface of the guardrail wall, and the grooves are formed by a preset arc-shaped convex mold.
3. The bridge anti-collision guardrail according to claim 1, characterized in that: A plurality of drainage pipes with uniform spacing are arranged at the junction of the bottom of the bridge anti-collision guardrail and the bridge deck road structure layer.
4. The bridge anti-collision guardrail according to claim 3, characterized in that: The drain pipe is a cast iron round pipe, and all parts of the cast iron round pipe except the water inlet and the water outlet are sealed.
5. The bridge anti-collision guardrail according to claim 1, characterized in that: The inner facade of the guardrail wall is painted with yellow and black reflective paint.
6. The bridge anti-collision guardrail according to claim 5, characterized in that: The line width and spacing of the yellow and black reflective paint are both 15 cm, and it is inclined at a 45° angle toward the direction of the lane.
7. The bridge anti-collision guardrail according to claim 1, characterized in that: The cross section of the guardrail wall is such that the lower width is 2-3 times the upper width, and the height is 1.8-2 times the lower width.
8. The bridge anti-collision guardrail according to claim 1, characterized in that: Stone chips are also filled between the outer side of the guardrail wall and the cushion layer.
9. The bridge anti-collision guardrail according to claim 1, characterized in that: The outer reinforcement layer of the guardrail has a transverse slope of 1.5°-2° descending toward the edge of the road.
10. The bridge anti-collision guardrail according to claim 4, characterized in that: The inner diameter of the drain pipe is φ14-φ16 cm, and the wall thickness of the circular pipe is 0.4-0.6 cm.