Concrete anti-corrosion guardrail for highway bridge

Abstract

The utility model provides a concrete anti-corrosion guardrail for a highway bridge, which comprises a concrete guardrail body and an anti-corrosion plate, the concrete guardrail body is fixed on a lateral roadbed of a highway along the extension direction of the highway; the anti-corrosion plate is tightly attached to the side wall, facing the road, of the concrete guardrail body, and the shape of the longitudinal section of the anti-corrosion plate is consistent with the structure of the side wall of the concrete guardrail body; the anti-corrosion plate comprises a plurality of spliced anti-corrosion plates, every two spliced anti-corrosion plates are fixedly connected through a left connecting end and a right connecting end, and a water guide groove is formed in the connecting area of every two spliced anti-corrosion plates and used for guiding rainwater to flow down along the water guide grooves so as to prevent rainwater accumulation. The anti-corrosion plate is combined with the concrete guardrail body, so that the technical defects in the aspects of construction complexity, later maintenance difficulty, anti-corrosion layer reliability, structural complexity and the like are overcome.

Description

TECHNICAL FIELD

[0001] The utility model relates to concrete guardrail anticorrosion technology especially relates to a concrete anticorrosion guardrail for highway bridge. BACKGROUND

[0002] Under the background of the vigorous development of today's transportation infrastructure, as a key protective facility on the highway, the durability and protective performance of concrete guardrails are facing unprecedented challenges. The diversity of complex geological conditions, such as the existence of a large number of saline-alkali soil, soft soil foundation or high humidity stratum, will make the concrete guardrail long-term suffer from the erosion of harmful substances in the soil and the penetration of groundwater. And freeze-thaw cycle becomes the "number one killer" of concrete guardrails in the area where the seasons change frequently. When the temperature is low, the water in the concrete expands when it freezes, producing a lot of pressure. When the temperature rises, the ice melts into water, leaving pores and micro-cracks, which speeds up the destruction process of the guardrail structure.

[0003] Taking the brushing of epoxy coating film type corrosion protection material as an example, the base treatment requirement is extremely high in the construction process. If the surface is not completely cleaned or the humidity is not properly controlled, it is easy to cause the coating adhesion to be insufficient, and the peeling and falling off phenomenon may occur in a short time. Moreover, the weather resistance of epoxy coating film itself is limited, and it is easy to age and discolor after long-term exposure to natural environment such as ultraviolet light, rain and wind, thereby losing the anticorrosion effect. Although water-based polymer coating type corrosion protection material has certain environmental protection advantages, its film forming performance is relatively weak, and the integrity of the film is difficult to guarantee under complex climate conditions. For example, after heavy rain or high temperature exposure, the coating film may have holes, cracks and other problems, so that the corrosion medium can easily penetrate the coating film and erode the concrete matrix. Although the penetration of silane impregnation type corrosion protection material can reach a certain depth inside the concrete, it is difficult to effectively protect the cracks or damage with a large depth due to its limited penetration depth. The construction process of silane impregnation is relatively complex, which requires professional construction equipment and strict construction condition control. Otherwise, it will affect the impregnation effect.

[0004] CN213571700U A highway anticorrosion guardrail, including guardrail body and anticorrosion plate, wherein, guardrail body is used to be fixed on the roadbed of the side of road along the extension direction of road, and the sidewall bottom towards the road surface is used to abut with the edge wall of road, anticorrosion plate is fixedly attached with the sidewall of guardrail body towards the road surface, and the bottom end is used to be sealedly connected with the road surface.The utility model provides a kind of highway anticorrosion guardrail, the sidewall of guardrail body is attached with anticorrosion plate, can block the sidewall of guardrail body from splashing sewage scouring damage, to avoid the corrosion caused by surface damage or sewage soaking of guardrail body, improve the anticorrosion performance of guardrail body, to be able to prolong its service life.However, its defect lies in that the structural design of guardrail body and anticorrosion plate mainly surrounds groove, drain hole, slope structure, convex edge etc., the structure is relatively fixed single, and the drainage effect is poor, and the anticorrosion effect of its anticorrosion plate is poor, and the adaptability to different environmental requirements is poor.

[0005] In summary, the above-mentioned highway bridge guardrail anticorrosion effect is poor, which not only increases the frequency and cost of highway maintenance, but also makes the safety hazard of concrete guardrail exist for a long time, which seriously restricts the development of highway concrete guardrail maintenance technology towards high efficiency, economy and durability.Therefore, a new, reliable and cost-effective anticorrosion solution is urgently needed to break through the existing difficulties. SUMMARY

[0006] To solve the above problems, the utility model provides a kind of concrete anticorrosion guardrail for highway bridge, which combines anticorrosion plate with concrete guardrail body to solve the technical defects in construction complexity, difficulty of later maintenance, anticorrosion layer reliability and structural complexity.

[0007] The technical scheme of the utility model is as follows:

[0008] The utility model provides a kind of concrete anticorrosion guardrail for highway bridge, including concrete guardrail body and anticorrosion plate, wherein,

[0009] The concrete guardrail body is fixed on the roadbed of the side of road along the extension direction of road;

[0010] The anticorrosion plate is tightly arranged on the sidewall of the concrete guardrail body towards the road, and the longitudinal section shape of the anticorrosion plate is consistent with the sidewall structure of the concrete guardrail body;

[0011] The anticorrosion plate includes a plurality of spliced anticorrosion plates, and each two spliced anticorrosion plates are fixedly connected through left and right connecting ends, and a water guide groove is formed in the connecting area of each two spliced anticorrosion plates for guiding rainwater to flow down along the water guide groove to prevent rainwater accumulation.

[0012] Further, the side wall of the concrete guardrail body comprises a first vertical surface, a second vertical surface, and the inclined surface connecting the first vertical surface and the second vertical surface, the first vertical surface and the second vertical surface are perpendicular to the bridge deck pavement, the vertical height of the lower end of the first vertical surface from the bridge deck pavement is 26 cm, and the vertical height of the upper end of the second vertical surface from the bridge deck pavement is 8 cm.

[0013] Further, the angle between the inclined surface of the concrete guardrail body and the bridge deck pavement is 50-55°, which is adjusted according to the simulation data of vehicle impact, so as to effectively disperse the impact force and reduce the damage in the collision.

[0014] Further, there is a water collection groove with a depth of 5 cm and a width of 5 cm between the second vertical surface of the concrete guardrail body and the bridge deck pavement adjacent to the second vertical surface, so as to collect and guide the accumulated water on the concrete corrosion-resistant guardrail and the bridge deck pavement, and reduce the risk of damage to the concrete corrosion-resistant guardrail foundation structure caused by the erosion of rainwater.

[0015] Further, the concrete guardrail body is made of high-strength and well-permeable concrete material, the compressive strength of which is not less than C30, and the impermeability grade is not less than P6, and a certain proportion of micro-silica powder and polypropylene fiber is mixed in the concrete, the micro-silica powder can improve the compactness and strength of the concrete, and the polypropylene fiber can effectively inhibit the generation and development of concrete cracks.

[0016] Further, the inside of the concrete guardrail body is provided with a reinforcing steel bar framework in the length direction and the height direction, the reinforcing steel bar framework is welded by screw steel bars with a diameter of not less than 10 mm, and the spacing between adjacent steel bar frameworks is not more than 30 cm, so as to enhance the overall structural strength and impact resistance of the concrete guardrail body.

[0017] Further, the spliced corrosion-resistant plate is an integral structure, and comprises a first vertical plate, an inclined plate, a second vertical plate, and a concave plate according to different angles with the bridge deck pavement, and each plate is respectively fixed along the first vertical surface, the inclined surface, and the second vertical surface of the concrete guardrail body and the inner wall of the water collection groove.

[0018] Further, the spliced corrosion-resistant plate is fixedly connected with the concrete guardrail body by a combination of screw fixation and epoxy resin adhesion.

[0019] Further, the width of the spliced anticorrosion plate is 1-1.2 m, and the thickness is 2 cm, a plurality of screw holes are arranged at 25-30 cm from both ends of the first vertical plate, the first vertical plate of the anticorrosion plate is fixed on the first vertical surface of the concrete guardrail body through bolts, and the side adjacent to the first vertical surface of the first vertical plate is reinforced through epoxy resin, so that the anticorrosion plate is tightly attached to the concrete guardrail body.

[0020] Further, the concave plate of the anticorrosion plate is fixed and attached to the inner wall of the water accumulation groove through epoxy resin, which can not only drain the water in the bridge deck pavement layer in time, but also play a corrosion prevention effect.

[0021] Further, the left connecting end and the right connecting end of each two spliced anticorrosion plates are arranged at the connecting edge, and the left connecting end and the right connecting end are fixedly connected through mutual clamping.

[0022] Further, the left connecting end of the spliced anticorrosion plate comprises a first slope surface and a first clamping piece, the first slope surface starts from 3 cm from the left side edge of the spliced anticorrosion plate and extends to 5 cm from the left side edge of the spliced anticorrosion plate, and the height of the first slope surface is about 1 / 2 of the thickness of the spliced anticorrosion plate.

[0023] The first clamping piece is a step structure formed at 0-2 cm from the left side edge of the spliced anticorrosion plate, and the thickness is reduced by 0.5 cm compared with the thickness of the spliced anticorrosion plate, which is used to adapt to the second clamping piece of the right connecting end to realize stable connection.

[0024] Further, the right connecting end of the spliced anticorrosion plate comprises a second slope surface and a second clamping piece, the second slope surface starts from 3 cm from the right side edge of the spliced anticorrosion plate and extends to 5 cm from the right side edge of the spliced anticorrosion plate, and the height of the second slope surface is about 1 / 2 of the thickness of the spliced anticorrosion plate.

[0025] The second clamping piece is a boss structure formed at 0-2 cm from the right side edge of the spliced anticorrosion plate, which is used to adapt to the first clamping piece of the left connecting end to realize stable connection.

[0026] Further, when the left connecting end of one spliced anticorrosion plate is clamped and connected with the right connecting end of another anticorrosion plate, the first slope surface and the second slope surface are connected with each other to form a trapezoidal water guide groove, and the depth of the trapezoidal water guide groove is the thickness of the first slope surface or the second slope surface.

[0027] Further, a transparent and colorless UV anti-glare coating is coated on the surface of the anticorrosion plate, the glossiness is 20-35, the haze is 20-30, and the roughness is 0.35-0.55.

[0028] Further, the construction method of the concrete anti-corrosion guard comprises the following steps:

[0029] Step a: when installing the first spliced anti-corrosion plate, epoxy resin is evenly applied on the vertical surface and the inclined surface of the concrete guard body, the width of the applied epoxy resin is 1-1.2 m, epoxy resin is applied on the inner wall of the water accumulation groove of the concrete guard body, the width of the applied epoxy resin is 1-1.2 m, then the first spliced anti-corrosion plate is fixed and compacted along the first vertical surface, the inclined surface and the second vertical surface of the concrete wall body and the inner wall of the water accumulation groove, after being fixed, the first spliced anti-corrosion plate is fixed on the crash barrier wall body through bolt connection at the first screw hole 25-30 cm away from both ends of the first spliced anti-corrosion plate;

[0030] Step b: when installing the second and subsequent spliced anti-corrosion plates, epoxy resin is evenly applied on the vertical surface and the inclined surface of the concrete guard body, the width of the applied epoxy resin is 1-1.2 m, epoxy resin is applied on the inner wall of the water accumulation groove of the concrete guard body, the width of the applied epoxy resin is 1-1.2 m, then the connection between the previous spliced anti-corrosion plate and the spliced anti-corrosion plate to be installed is coated with epoxy resin, the left connecting end of the spliced anti-corrosion plate to be installed is fixedly connected with the right connecting end of the previous spliced anti-corrosion plate, then the spliced anti-corrosion plate to be installed is fixed and compacted along the first vertical surface, the inclined surface and the second vertical surface of the concrete guard body and the inner wall of the water accumulation groove, after being fixed, the spliced anti-corrosion plate is fixed on the crash barrier wall body through bolt connection at the first screw hole 25-30 cm away from both ends of the spliced anti-corrosion plate, finally, epoxy resin is applied in the second screw hole at the connection between the two spliced anti-corrosion plates, and the connection between the two spliced anti-corrosion plates is further reinforced and connected through six bolts.

[0031] Further, the anti-corrosion plate is made of raw materials with the following mass percentages: 30% of unsaturated resin, 15% of low shrinkage agent, 15% of glass fiber, 25% of anti-corrosion agent and 15% of reinforcing agent.

[0032] Further, the unsaturated resin is made of unsaturated diacid (HOOC--CH=CHCH2—COOH), saturated diacid (C n H 2n (COOH)2, wherein n=0, 1, 2, 3 or 4) and dihydric alcohol (CnH 2n+2O2, wherein n = 1, 2 or 3) is condensed at a temperature of 270-280 DEG C to form a thermosetting resin. The unsaturated resin is the matrix material of the anticorrosion plate, which can bond other materials together to form a continuous whole structure. The unsaturated resin provides the basic strength and toughness for the anticorrosion plate, and the unsaturated bonds in the chemical structure can cross-link during the curing process, so that the plate has good mechanical properties such as hardness and impact resistance; meanwhile, the unsaturated resin itself can block the external environment to some extent, and also contributes to the anticorrosion performance.

[0033] Further, the low shrinkage agent is polyvinyl acetate (PVA). The low shrinkage agent reduces the shrinkage of the material during the curing process of the unsaturated resin, and reduces the deformation, warping and even cracks of the plate caused by shrinkage. The use of polyvinyl acetate in the present application can effectively improve the dimensional stability of the anticorrosion plate, ensure the flatness and precision of the plate, reduce the generation of internal stress, and thus improve the overall quality and service life of the plate.

[0034] Further, the glass fiber is any one or more of silicon dioxide (SiO2), aluminum oxide (Al2O3), calcium oxide (CaO), boron oxide (B2O3), magnesium oxide (MgO) and sodium oxide (Na2O). The glass fiber plays a role of skeleton in the matrix resin, and can significantly improve the tensile strength, bending strength and other mechanical properties of the anticorrosion plate, so that it is not easy to deform or damage when subjected to external force. At the same time, the glass fiber can also prevent the penetration of corrosive medium to some extent, and improve the anticorrosion performance.

[0035] Further, the anticorrosive agent is mixed by glycerol, potassium sorbate and sodium dehydroacetate in a mass ratio of 5:1:2.

[0036] Further, the reinforcing agent is polyacrylic acid sodium with a chemical formula of C3H3NaO2, and the viscosity thereof should be not less than 600 mPa.s.

[0037] Further, the preparation method of the anticorrosion plate comprises the following steps:

[0038] Step one: the unsaturated resin, the low shrinkage agent, the glass fiber and the above-mentioned quality ratio are mixed, and stirred for 8 to 10 minutes to obtain the anticorrosion plate matrix mixture;

[0039] Step two: the anticorrosive agent and the reinforcing agent are added to the anticorrosion plate matrix mixture according to the above-mentioned quality ratio, and then stirred and placed for 10 to 15 minutes to eliminate the bubbles caused by stirring, to obtain the anticorrosion plate pre-preparation mixture;

[0040] Step three: using the compression molding, the anticorrosive plate preform mixture is placed between the upper and lower molds, the mold is placed on the hydraulic forming table after the mold is closed, and the anticorrosive plate preform mixture is cured and formed under the high temperature and high pressure environment of 350-400 DEG C, 10-12 MPa for 25-45 minutes, so that the anticorrosive plate preform mixture is cured and formed, and the anticorrosive plate finished product is obtained.

[0041] The technical scheme provided by the utility model can have the following beneficial effects:

[0042] (1) The utility model realizes a leap in design in the connection of the anticorrosive plate, each spliced anticorrosive plate is provided with a left connecting end and a right connecting end, the left connecting end and the right connecting end each have a slope surface and a clamping piece, so that when the two adjacent spliced anticorrosive plates are spliced, a water guide groove in the shape of a trapezoid is formed between the left connecting end of one spliced anticorrosive plate and the right connecting end of another spliced anticorrosive plate, and the anticorrosive plate is provided with a horizontal water accumulation groove at the joint with the bridge deck pavement layer, thereby being integrated with the drainage system of the bridge deck pavement layer. The combination of the water guide groove and the water accumulation groove can quickly and efficiently drain the rainwater and dirt accumulated on the surface of the concrete guardrail, greatly improving the protection efficiency of the anticorrosive plate on the guardrail and ensuring the cleanliness and safety of the bridge deck environment.

[0043] (2) The anticorrosive plate of the utility model is prepared from 30% unsaturated resin, 15% glass fiber, 25% high-efficiency anticorrosive agent, 15% reinforcing agent and 15% low-shrinkage agent and is precisely pressed by a high-temperature and high-pressure mold, thereby exhibiting unprecedented high strength, excellent toughness and long-lasting anticorrosion performance and laying a solid foundation for structural safety.

[0044] (3) In order to further improve the use safety, the guardrail anticorrosive plate of the utility model not only adopts light green as the forming color, but also is specially provided with a transparent and colorless UV anti-glare coating. The coating can effectively resist the glare and glare phenomenon caused by the direct irradiation of the light of vehicles on the bridge, thereby greatly reducing the risk of traffic accidents caused thereby and adding a solid guarantee for driving safety. BRIEF DESCRIPTION OF DRAWINGS

[0045] Figure 1 It is the overall structure diagram of the concrete anticorrosive guardrail of the utility model.

[0046] Figure 2 It is the overall sectional view of the concrete anticorrosive guardrail.

[0047] Figure 3 It is the local enlarged view of the water accumulation groove of the concrete anticorrosive guardrail.

[0048] Figure 4 It is the structure diagram of the single spliced anticorrosive plate.

[0049] Figure 5It is a schematic view of the connection position of two spliced anticorrosion plates.

[0050] Figure 6 It is a front view of the anticorrosion plate.

[0051] Reference signs:

[0052] 1 - concrete guardrail body;

[0053] 2 - anticorrosion plate;

[0054] 201 - first slope surface of left connecting end, 202 - first clamping part of left connecting end, 203 - second slope surface of right connecting end, 204 - second clamping part of right connecting end;

[0055] 3 - water guide groove;

[0056] 4 - water accumulation groove;

[0057] 5 - bridge deck pavement. DETAILED DESCRIPTION

[0058] The preferred embodiments of the present application will be described in more detail below. Although the preferred embodiments of the present application are described below, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present application is more thorough and complete, and the scope of the present application can be completely conveyed to those skilled in the art. EMBODIMENT

[0059] As shown in Figures 1 to 6 , a concrete anticorrosion guardrail for highway bridge is provided, comprising a concrete guardrail body 1 and an anticorrosion plate 2, wherein,

[0060] The concrete guardrail body 1 is fixed on the roadside embankment along the extension direction of the highway;

[0061] The anticorrosion plate 2 is closely arranged on the side wall of the concrete guardrail body 1 facing the highway, and the longitudinal section shape of the anticorrosion plate 2 is consistent with the side wall structure of the concrete guardrail body 1;

[0062] The anticorrosion plate 2 comprises a plurality of spliced anticorrosion plates, and each two spliced anticorrosion plates are fixedly connected through left and right connecting ends, forming a water guide groove 3 in the connection area of each two spliced anticorrosion plates, which is used to guide the rainwater to flow down along the water guide groove to prevent rainwater accumulation.

[0063] Further, the side wall of the concrete guardrail body 1 comprises a first vertical surface, a second vertical surface, and an inclined surface connecting the first vertical surface and the second vertical surface, the first vertical surface and the second vertical surface are perpendicular to the bridge deck pavement 5, the vertical height of the lower end of the first vertical surface from the bridge deck pavement 5 is 26 cm, and the vertical height of the upper end of the second vertical surface from the bridge deck pavement 5 is 8 cm.

[0064] Further, the angle between the inclined surface of the concrete guardrail body 1 and the bridge deck pavement 5 is 50-55°, which is adjusted according to the simulation data of vehicle impact to ensure that the impact force can be effectively dispersed during the impact and the damage is reduced.

[0065] Further, there is a 5cm-deep and 5cm-wide water collection groove 4 between the second vertical surface of the concrete guardrail body 1 and the bridge deck pavement 5 adjacent to the second vertical surface, so as to collect and guide the water on the concrete corrosion-resistant guardrail and the bridge deck pavement 5, thereby reducing the risk of damage to the concrete corrosion-resistant guardrail structure caused by the erosion of rainwater.

[0066] Further, the concrete guardrail body 1 is made of high-strength and well-permeable concrete material, the compressive strength of which is not less than C30, and the impermeability grade is not less than P6, and a certain proportion of micro-silica powder and polypropylene fibers are mixed in the concrete, the micro-silica powder can improve the compactness and strength of the concrete, and the polypropylene fibers can effectively inhibit the generation and development of concrete cracks.

[0067] Further, the internal part of the concrete guardrail body 1 is provided with reinforcing steel bar skeletons in the length direction and the height direction, the reinforcing steel bar skeletons are welded by threaded steel bars with a diameter of not less than 10 mm, and the spacing between adjacent steel bar skeletons is not more than 30 cm, so as to enhance the overall structural strength and impact resistance of the concrete guardrail body 1.

[0068] Further, the spliced corrosion-resistant plate is an integral structure, which comprises a first vertical plate, an inclined plate, a second vertical plate, and a concave plate according to different angles with the bridge deck pavement 5, and each plate is fixed along the first vertical surface, the inclined surface, and the second vertical surface of the concrete guardrail body 1 and the inner wall of the water collection groove 4.

[0069] Further, the spliced corrosion-resistant plate is fixedly connected with the concrete guardrail body 1 by a combination of screw fixation and epoxy resin adhesion.

[0070] Further, the width of the spliced corrosion-resistant plate is 1-1.2 m, and the thickness is 2 cm, a plurality of screw holes are arranged on the first vertical plate at a distance of 25-30 cm from both ends, the first vertical plate of the corrosion-resistant plate 2 is fixed on the first vertical surface of the concrete guardrail body 1 by bolts, and the first vertical plate and the side adjacent to the first vertical surface are reinforced by epoxy resin, so that the corrosion-resistant plate 2 is tightly attached to the concrete guardrail body 1.

[0071] Further, the concave plate of the anticorrosion plate 2 is fixed to the inner wall of the water collecting groove 4 by using epoxy resin, which can not only timely drain the water in the bridge deck pavement 5, but also play an anticorrosion effect.

[0072] Further, the left connecting end and the right connecting end are respectively arranged at the connecting edge of each two spliced anticorrosion plates, and the left connecting end and the right connecting end are fixedly connected by mutual clamping.

[0073] Further, the left connecting end of the spliced anticorrosion plate comprises a first slope surface 201 and a first clamping piece 202, the first slope surface 201 starts from a position 3 cm away from the left side edge of the spliced anticorrosion plate and extends to a position 5 cm away from the left side edge of the spliced anticorrosion plate, and the height of the first slope surface 201 is about 1 / 2 of the thickness of the spliced anticorrosion plate.

[0074] Further, the right connecting end of the spliced anticorrosion plate comprises a second slope surface 203 and a second clamping piece 204, the second slope surface 203 starts from a position 3 cm away from the right side edge of the spliced anticorrosion plate and extends to a position 5 cm away from the right side edge of the spliced anticorrosion plate, and the height of the second slope surface 203 is about 1 / 2 of the thickness of the spliced anticorrosion plate.

[0075] Further, the first clamping piece 202 is a step structure formed at a position 0 cm to 2 cm away from the left side edge of the spliced anticorrosion plate, and the thickness is reduced by 0.5 cm compared with the thickness of the spliced anticorrosion plate, which is used to adapt to the second clamping piece 204 of the right connecting end to realize stable connection.

[0076] Further, the second clamping piece 204 is a boss structure formed at a position 0 cm to 2 cm away from the right side edge of the spliced anticorrosion plate, which is used to adapt to the first clamping piece 202 of the left connecting end to realize stable connection.

[0077] Further, when the left connecting end of one spliced anticorrosion plate is clamped with the right connecting end of another anticorrosion plate, the first slope surface 201 and the second slope surface 203 are connected with each other to form a trapezoidal water guide groove 3, and the depth of the trapezoidal water guide groove 3 is the thickness of the first slope surface 201 or the second slope surface 203.

[0078] Further, the surface of the anticorrosion plate 2 is coated with a transparent and colorless UV anti-glare coating, the glossiness is 20-35, the haze is 20-30, and the roughness is 0.35-0.55.

[0079] Further, the construction anticorrosion of the concrete anticorrosion guardrail comprises the following steps:

[0080] Step a: When installing the first spliced ​​anti-corrosion plate, apply epoxy resin evenly to the vertical and inclined surfaces of the concrete guardrail body 1, with a width of 1 to 1.2m. Apply epoxy resin to the inner wall of the water collection trough 4 of the concrete guardrail body 1, with a width of 1 to 1.2m. Then, attach and fix the first spliced ​​anti-corrosion plate along the first vertical surface, inclined surface, and second vertical surface of the concrete guardrail body 1 and the inner wall of the water collection trough 4, and press it firmly. After fixing, fix the first spliced ​​anti-corrosion plate to the concrete guardrail body 1 with bolts at the first screw hole 25cm to 30cm away from both ends of the first spliced ​​anti-corrosion plate.

[0081] Step b: When installing the second and subsequent spliced ​​anti-corrosion panels, evenly apply epoxy resin to the vertical and inclined surfaces of the concrete guardrail body 1, with a width of 1-1.2m. Apply epoxy resin to the inner wall of the water collection trough 4 of the concrete guardrail body 1, with a width of 1-1.2m. Then, apply epoxy resin to the connection between the previous spliced ​​anti-corrosion panel and the spliced ​​anti-corrosion panel to be installed. Securely fasten the left connecting end of the spliced ​​anti-corrosion panel to the right connecting end of the previous spliced ​​anti-corrosion panel. Then, the spliced ​​anti-corrosion panels to be installed are attached and fixed along the first vertical surface, inclined surface, and second vertical surface of the concrete guardrail body 1 and the inner wall of the water collection trough 4, and pressed firmly. After fixing, the spliced ​​anti-corrosion panels are fixed to the concrete guardrail body 1 by bolts at the first screw holes 25cm to 30cm away from both ends. Finally, epoxy resin is applied to the second screw holes at the connection between the two spliced ​​anti-corrosion panels, and the connection between the two spliced ​​anti-corrosion panels is further reinforced by 6 bolts.

[0082] Furthermore, the anti-corrosion board 2 is made of the following raw materials in weight percentages: 30% unsaturated resin, 15% low shrinkage agent, 15% glass fiber, 25% preservative and 15% reinforcing agent.

[0083] Furthermore, the unsaturated resin is obtained by using unsaturated dicarboxylic acids (HOOC--CH=CHCH2—COOH) and saturated dicarboxylic acids (C n H 2n (COOH)2, where n = 0, 1, 2, 3 or 4) and diols (CnH) 2n+2 O2 (where n=1, 2, or 3) is a thermosetting resin formed by condensation polymerization at a temperature of 270-280℃. Unsaturated resin serves as the matrix material for anti-corrosion boards, bonding other materials together to form a continuous, integrated structure. Unsaturated resin provides the basic strength and toughness of the anti-corrosion board; the unsaturated bonds in its chemical structure can undergo cross-linking reactions during curing, giving the board good mechanical properties such as hardness and impact resistance. Simultaneously, the unsaturated resin itself can, to a certain extent, block the external environment, contributing to its anti-corrosion performance.

[0084] Further, the low shrinkage agent is polyvinyl acetate (PVA). The low shrinkage agent reduces the shrinkage of the material during the curing process of the unsaturated resin, and reduces the deformation, warping and even cracks of the plate caused by shrinkage. The polyvinyl acetate used in the utility model can effectively improve the dimensional stability of the corrosion-resistant plate, ensure the flatness and precision of the plate, reduce the generation of internal stress, and thus improve the overall quality and service life of the plate.

[0085] Further, the glass fiber is any one or more of silicon dioxide (SiO2), aluminum oxide (Al2O3), calcium oxide (CaO), boron oxide (B2O3), magnesium oxide (MgO) and sodium oxide (Na2O). The glass fiber plays a role of skeleton in the matrix resin, and can significantly improve the mechanical properties such as tensile strength and bending strength of the corrosion-resistant plate, so that it is not easy to deform or damage when subjected to external force. At the same time, the glass fiber can also prevent the penetration of corrosive medium to some extent, and improve the corrosion resistance.

[0086] Further, the corrosion inhibitor is mixed by glycerol, potassium sorbate and sodium dehydroacetate in a mass ratio of 5:1:2.

[0087] Further, the reinforcing agent is polyacrylic acid sodium with a chemical formula of C3H3NaO2, and the viscosity thereof should be not less than 600 mPa.s.

[0088] Further, the preparation method of the corrosion-resistant plate 2 comprises the following steps:

[0089] Step one: after mixing the unsaturated resin, the low shrinkage agent and the glass fiber in the above mass ratio, stirring for 8 to 10 minutes, the corrosion-resistant plate base material mixture is obtained;

[0090] Step two: on the basis of the corrosion-resistant plate base material mixture, the corrosion inhibitor and the reinforcing agent are added in the above mass ratio, and then after stirring, the mixture is placed for 10 to 15 minutes to eliminate the bubbles caused by stirring, and the corrosion-resistant plate precast mixture is obtained;

[0091] Step three: using mold forming, the corrosion-resistant plate precast mixture is placed between the upper and lower molds, the molds are placed on the hydraulic forming table after closing, and the corrosion-resistant plate precast mixture is pressed for 25-45 minutes under the high temperature and high pressure environment of 350℃-400℃ and 10MPa-12MPa, so that the corrosion-resistant plate precast mixture is cured and formed, and the finished corrosion-resistant plate is obtained.

[0092] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any other form, and any modification or equivalent change made according to the technical essence of the utility model still belongs to the scope of protection claimed by the utility model.

Claims

1. A concrete corrosion-proof guard rail for a highway bridge, characterized by, The concrete guardrail body (1) is fixed on the roadside embankment along the extension direction of the highway. The anticorrosion plate (2) is closely arranged on the side wall of the concrete guardrail body (1) facing the highway, and the longitudinal section shape of the anticorrosion plate (2) is consistent with the side wall structure of the concrete guardrail body (1). The anticorrosion plate (2) includes a plurality of spliced anticorrosion plates, and each two spliced anticorrosion plates are fixedly connected through left and right connecting ends. The side wall of the concrete guardrail body (1) includes a first vertical surface, a second vertical surface, and an inclined surface connecting the first vertical surface and the second vertical surface.

2. The concrete corrosion-resistant guardrail according to claim 1, characterized by, The first vertical surface and the second vertical surface are perpendicular to the bridge deck pavement (5), the vertical height of the lower end of the first vertical surface from the bridge deck pavement (5) is 26 cm, and the vertical height of the upper end of the second vertical surface from the bridge deck pavement (5) is 8 cm.

3. The concrete corrosion-resistant guardrail according to claim 2, characterized in that, The second vertical surface of the concrete guardrail body (1) and the bridge deck pavement (5) adjacent to the second vertical surface have a water accumulation groove (4) with a depth of 5 cm and a width of 5 cm, thereby collecting and guiding the accumulated water on the concrete anticorrosion guardrail and the bridge deck pavement (5), and reducing the risk of damage to the concrete anticorrosion guardrail foundation structure caused by the erosion of rainwater.

4. The concrete corrosion-resistant guardrail according to claim 3, characterized in that, The spliced anticorrosion plate is an integral structure and includes a first vertical plate, an inclined plate, a second vertical plate, and a concave plate according to different angles with the bridge deck pavement (5), and each plate is fixedly attached along the first vertical surface, the inclined surface, and the second vertical surface of the concrete guardrail body (1) and the inner wall of the water accumulation groove (4).

5. The concrete corrosion-resistant guardrail according to claim 4, characterized in that, The spliced anticorrosion plate is fixedly connected with the concrete guardrail body (1) by a combination of screw fixation and epoxy resin adhesion.

6. The concrete corrosion-resistant guardrail according to claim 5, characterized in that, The width of the spliced anticorrosion plate is 1-1.2 m, and the thickness is 2 cm.

7. A concrete corrosion-resistant guard-rail according to claim 6, characterised in that The first vertical plate is fixed on the first vertical surface of the concrete guardrail body (1) by bolts, and the side adjacent to the first vertical surface is reinforced by epoxy resin, so that the anticorrosion plate (2) is closely attached to the concrete guardrail body (1).

8. The concrete corrosion-resistant guardrail according to claim 7, characterized in that, The concave plate of the anticorrosion plate (2) is fixedly attached to the inner wall of the water accumulation groove (4) by epoxy resin, which can not only drain the water on the bridge deck pavement (5) in time, but also has a corrosion prevention effect. Each two spliced anticorrosion plates are respectively provided with left and right connecting ends at the connecting edges, and the left and right connecting ends are fixedly connected by mutual clamping.

9. A concrete corrosion-proof fence according to claim 1 or 2, characterized in that The left connecting end of the spliced anticorrosion plate comprises a first slope surface (201) and a first clamping piece (202), the first slope surface (201) starts from a position 3 cm away from the left edge of the spliced anticorrosion plate and extends to a position 5 cm away from the left edge of the spliced anticorrosion plate, and the height of the first slope surface (201) is about 1 / 2 of the thickness of the spliced anticorrosion plate; The right connecting end of the spliced anticorrosion plate comprises a second slope surface (203) and a second clamping piece (204), the second slope surface (203) starts from a position 3 cm away from the right edge of the spliced anticorrosion plate and extends to a position 5 cm away from the right edge of the spliced anticorrosion plate, and the height of the second slope surface (203) is about 1 / 2 of the thickness of the spliced anticorrosion plate; The first clamping piece (202) is a step structure formed at a position 0 cm to 2 cm away from the left edge of the spliced anticorrosion plate, and the thickness is reduced by 0.5 cm compared with the thickness of the spliced anticorrosion plate, for adapting the second clamping piece (204) of the right connecting end to realize stable connection; The second clamping piece (204) is a boss structure formed at a position 0 cm to 2 cm away from the right edge of the spliced anticorrosion plate, for adapting the first clamping piece (202) of the left connecting end to realize stable connection.

10. A concrete corrosion-resistant guard-rail according to claim 1 or 2, characterised in that When the left connecting end of one spliced anticorrosion plate is clamped with the right connecting end of another anticorrosion plate, the first slope surface (201) and the second slope surface (203) are connected with each other to form a trapezoidal water guide groove (3), and the depth of the water guide groove (3) is the thickness of the first slope surface (201) or the second slope surface (203).

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