Concrete anti-collision wall, construction method, used anti-corrosion plate and preparation method

Abstract

The invention provides a concrete anti-collision wall, a construction method, a used anti-corrosion plate and a preparation method. The concrete anti-collision wall comprises a concrete wall body and an anti-corrosion plate tightly attached to the side wall of the concrete wall body, the side wall of the concrete wall body comprises an inclined face, a groove is carved in the center of the inclined face, and the groove extends in the horizontal direction, penetrates through the concrete wall body and is used for arranging a distributed strain sensing system; the shape of the longitudinal section of the anti-corrosion plate is consistent with the structure of the side wall of the concrete wall so as to ensure that the anti-corrosion plate can be tightly attached to the side wall of the concrete wall; the anti-corrosion plate comprises a plurality of spliced anti-corrosion plates, and every two spliced anti-corrosion plates are fixedly connected in a meshed mode through a C-shaped buckle and fastened at the meshed connection position of the C-shaped buckles through bolts. The anti-corrosion plate made of a special material is combined with the concrete wall body, complexity caused by a multi-layer structure is reduced, and the technical defects of the prior art 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 invention relates to a concrete anti-corrosion technology for anti-collision walls, and in particular to a concrete anti-collision wall and a construction method, an anti-corrosion plate used therein, and a preparation method thereof. Background Art

[0002] As a key exposed engineering part in highway construction, the surface condition of concrete crash barriers plays a vital role in the image of the entire project and driving safety. In actual use, concrete crash barriers face many complex and severe external factors.

[0003] In particular, when placed under complex geological conditions and subjected to freeze-thaw cycles, traditional concrete crash barriers expose many serious problems. Due to the complex geological conditions, there may be erosion sources such as acid and alkali substances, and the repeated freezing and melting of water during the freeze-thaw cycle, concrete crash barriers are extremely susceptible to erosion, corrosion, neutralization, and freeze-thaw damage. This destructive effect has a significant cumulative effect, often causing a large number of cracks, concrete spalling, and reinforcement leakage in the wall in just 2-3 years. These diseases not only greatly damage the appearance of the concrete crash wall, making it mottled and seriously affecting the overall aesthetics of the highway, but also greatly shorten its service life and increase the cost and frequency of later maintenance. More importantly, when the disease develops to a serious level, the steel bars will be severely corroded, which will directly weaken the structural strength and safety performance of the crash wall, burying a huge safety hazard for highway driving safety.

[0004] To address these problems, traditional anti-corrosion methods mainly use functional materials to paint the concrete surface, among which the more common ones are epoxy coatings, water-based polymer coatings, and permeable silane impregnations. However, these traditional anti-corrosion methods all have obvious technical defects in practical applications. From the perspective of material cost, the prices of the above-mentioned functional materials are relatively high, which undoubtedly greatly increases the material cost investment of concrete anti-corrosion wall anti-corrosion projects. In terms of construction, due to differences in the technical level and construction process mastery of different construction teams, the construction quality is uneven, and it is difficult to ensure that every anti-corrosion wall can achieve the expected anti-corrosion effect. Moreover, even when the construction quality is good, the anti-corrosion effect of these traditional anti-corrosion methods is not ideal. It is difficult to effectively resist the long-term erosion of harsh environmental factors such as complex geological conditions and freeze-thaw cycles, and it is impossible to provide reliable and lasting anti-corrosion protection for concrete anti-collision walls, thus making it difficult to meet the increasing requirements of highway projects for the anti-corrosion performance of concrete anti-collision walls.

[0005] CN209646182U discloses an anticorrosion structure of a concrete wall and a concrete absorption tower, wherein the anticorrosion structure of the concrete wall includes a concrete wall, a pre-embedded anticorrosion plate and a spliced ​​anticorrosion plate, wherein a plurality of spliced ​​anticorrosion plates are fixedly connected in a spliced ​​form to cover the surface of the concrete wall, and a pre-embedded anticorrosion plate is provided at the splicing seam between two adjacent spliced ​​anticorrosion plates, wherein the pre-embedded anticorrosion plate is embedded in the concrete wall and has an exposed surface that exposes the concrete wall, wherein the exposed surface of the pre-embedded anticorrosion plate contacts the spliced ​​anticorrosion plate and the pre-embedded anticorrosion plate covers the entire splicing seam. The anticorrosion structure of the concrete wall can provide comprehensive anticorrosion protection to the concrete wall, and effectively avoids corrosion of the concrete wall. However, its defect is that the anticorrosion structure needs to be provided with a pre-embedded anticorrosion plate and a spliced ​​anticorrosion plate, and the sealing and anticorrosion effect at the splicing seam must be ensured, which undoubtedly increases the complexity of the construction. For some situations where the construction site is narrow or the construction conditions are poor, this complex construction process may cause inconvenience, increase construction time and cost.

[0006] CN117721742A discloses a highway crash barrier and construction method, the technical scheme of which is as follows: it comprises a main body, an absorption layer, a vibration layer and an outer cover layer are arranged on the outside of the main body in sequence, the surface of the outer cover layer is coated with an anti-corrosion layer, and a metal shell for wrapping the vibration layer is arranged between the vibration layer and the outer cover layer. By arranging the absorption layer and the vibration layer inside the crash barrier, the crash barrier can absorb a large amount of kinetic energy of out-of-control vehicles in an instant, thereby achieving a good stopping effect, and the high-toughness concrete can absorb more energy by its own toughness, and the resistance slope behind the crash barrier can further enhance the impact resistance of the crash barrier, so that the crash barrier can achieve a good stopping effect without a large thickness, thereby saving road space and helping to improve land utilization. However, although it is mentioned in the scheme description that the surface of the outer cover layer is coated with an anti-corrosion layer, the material and thickness of the anti-corrosion layer are not described in detail, especially the anti-corrosion effect during long-term use of the highway crash barrier, which is exposed to the external environment for a long time, subjected to various climatic conditions and chemical substances such as vehicle exhaust. In addition, the anti-collision wall structure includes multiple layers such as the main body, absorption layer, vibration layer, outer cover layer and metal shell. The structure is relatively complex, which not only increases the difficulty of construction, but also leads to a significant increase in material and construction costs. In addition, the multi-layer structure design needs to consider the coordination and long-term stability between the layers. For example, whether the absorption layer and the vibration layer will affect the performance of the outer cover layer and the anti-corrosion layer after absorbing vehicle impacts for many times; whether the metal shell will rust in a long-term humid environment and affect the functions of other layers, these are not specifically explained in the existing technical content.

[0007] Therefore, the current technical status quo in the field of concrete crash barriers, such as complex structure, high material costs and difficult construction, is an issue that needs to be addressed urgently. Summary of the invention

[0008] In order to solve the above technical problems, the purpose of the present invention is to provide a concrete anti-collision wall and a construction method thereof. The present invention mainly combines a special material anti-corrosion plate with a concrete wall, reduces the complexity brought by the multi-layer structure, and solves the technical defects of the prior art in terms of construction complexity, later maintenance difficulty, anti-corrosion layer reliability and structural complexity by applying epoxy resin, fixing sensor optical cables and using C-type buckles to splice anti-corrosion plates.

[0009] The technical solution of the present invention is as follows: A concrete anti-collision wall comprises a concrete wall body and an anti-corrosion plate closely arranged on the side wall of the concrete wall, wherein: The side wall of the concrete wall comprises an inclined surface, a groove is engraved at the center of the inclined surface, and the groove extends in a horizontal direction and passes through the concrete wall, and is used for arranging a distributed strain sensing system; The longitudinal section shape of the anti-corrosion plate is consistent with the side wall structure of the concrete wall, so as to ensure that the anti-corrosion plate can be closely attached to the side wall of the concrete wall; The anti-corrosion plate comprises a plurality of spliced ​​anti-corrosion plates, and every two spliced ​​anti-corrosion plates are fixedly connected by a C-shaped buckle bite, and are fastened at the bite connection of the C-shaped buckle by bolts.

[0010] Furthermore, the inclination angle between the slope of the concrete wall and the horizontal road surface is 50-55°, which is adjusted according to the simulation data of vehicle impact to ensure that the impact force can be effectively dispersed and the damage can be reduced during the collision.

[0011] Furthermore, the side wall of the concrete wall includes 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 horizontal road surface. The vertical height of the lower end of the first vertical surface from the horizontal road surface is 26 cm, and the vertical height of the upper end of the second vertical surface from the horizontal road surface is 8 cm.

[0012] Furthermore, there is a water trough with a depth of 5 cm and a width of 5 cm between the second vertical surface of the concrete wall and the horizontal road surface adjacent to the second vertical surface, so as to collect and guide the accumulated water on the concrete crash barrier and the horizontal road surface, thereby reducing the risk of damage to the concrete crash barrier foundation structure due to the erosion of rainwater.

[0013] Furthermore, the concrete wall is made of high-strength, impermeability-good concrete material, with a compressive strength of not less than C30 and a permeability grade of not less than P6. A certain proportion of microsilica powder and polypropylene fiber is added to the concrete. The microsilica powder can improve the density and strength of the concrete, and the polypropylene fiber can effectively inhibit the generation and development of concrete cracks.

[0014] Furthermore, reinforcing steel bar skeletons are arranged at intervals inside the concrete wall along the length and height directions. The reinforcing steel bar skeletons are welded from threaded steel bars with a diameter of not less than 10 mm, and the spacing between adjacent steel bar skeletons does not exceed 30 cm, so as to enhance the overall structural strength and impact resistance of the concrete wall.

[0015] Furthermore, the groove has a depth of 1.5-2.5 mm, a width of 1.8-2.2 mm, and a quadrilateral cross section.

[0016] More specifically, the groove has a depth of 2 mm and a width of 2 mm.

[0017] Furthermore, the inner wall of the groove has a rough surface that has been polished to enhance the bonding force with the distributed strain sensing system, thereby better fixing the distributed optical fiber monitoring system.

[0018] Furthermore, a waterproof and breathable isolation layer is provided on the inner wall of the groove. The isolation layer is made of a polytetrafluoroethylene microporous membrane, which can prevent moisture accumulation from damaging the distributed strain sensing system while allowing gas exchange to avoid affecting the sensing performance due to changes in air pressure.

[0019] Furthermore, the distributed strain sensing system is a high-transmission distributed strain sensing optical cable, which is encapsulated and protected by polyurethane elastomer material. The high-transmission distributed strain sensing optical cable can accurately sense and measure the tiny strains generated by structures such as concrete crash barriers under external loads, temperature changes, self-deformation and other factors; by analyzing the changes in the transmission characteristics of the optical signal in the optical cable, the strain information is converted into measurable changes in optical signal parameters, such as wavelength drift, light intensity attenuation, etc., thereby achieving high-precision monitoring of strain.

[0020] Furthermore, the high-transmission distributed strain sensing optical cable is used in combination with Brillouin distributed optical fiber sensing technology. The Brillouin distributed optical fiber sensing technology utilizes the Brillouin scattering effect in the optical fiber for sensing, and can continuously monitor the strain changes along the optical fiber, thereby enabling the optical cable to perform high-precision strain monitoring over a long distance.

[0021] Furthermore, the high transmission distributed strain sensing optical cable is sealed in the groove with epoxy resin. The optical cable is kept in a tight state in the groove and connected to the optical fiber demodulator, and the entire groove is also filled with epoxy resin to protect the optical cable.

[0022] Furthermore, the spliced ​​anti-corrosion plate is an integrally formed structure, and includes a first vertical plate, an inclined plate, a second vertical plate and a concave plate according to different angles with the horizontal road surface. Each plate is respectively adhered and fixed along the first vertical surface of the concrete wall, the inclined surface, the second vertical surface and the inner wall of the water tank.

[0023] Furthermore, the spliced ​​anti-corrosion plate is fixedly connected to the concrete wall by a combination of screw fixing and epoxy resin bonding.

[0024] Furthermore, the width of the spliced ​​anti-corrosion plate is 1 to 1.2 m, and the thickness is 1 cm. A plurality of first screw holes are respectively arranged on the first vertical plate at 25 cm to 30 cm away from both ends thereof. The first vertical plate of the anti-corrosion plate is fixed to the first vertical surface of the concrete wall by bolts, and at the same time, one side of the first vertical plate adjacent to the first vertical surface is reinforced by epoxy resin, so that the anti-corrosion plate is tightly fitted to the concrete wall.

[0025] Furthermore, epoxy resin is used to adhere and fix the concave plate of the anti-corrosion plate to the inner wall of the water tank, which can not only discharge the moisture on the horizontal road surface in time, but also play an anti-corrosion effect.

[0026] Furthermore, each two spliced ​​anti-corrosion plates are provided with a C-shaped buckle interlocking structure at the connection, wherein the C-shaped buckle of one spliced ​​anti-corrosion plate is bent inward, and the C-shaped buckle of the other spliced ​​anti-corrosion plate is bent outward, so that when the two spliced ​​anti-corrosion plates are spliced, the two C-shaped buckles interlock with each other to form a closed structure.

[0027] Furthermore, the C-shaped buckle and the spliced ​​anti-corrosion plate are an integrally formed structure.

[0028] Furthermore, the width of the C-shaped buckle accounts for 5% of the width of the spliced ​​anti-corrosion plate.

[0029] Furthermore, two second screw holes are respectively provided at the top, middle and bottom of the connection between each two spliced ​​anti-corrosion plates, and each two second screw holes at the same height from the horizontal road surface are symmetrically arranged along the center line of the connection, and two bolts are respectively passed through the inward C-shaped buckle of one spliced ​​anti-corrosion plate and the outward C-shaped buckle of the other spliced ​​anti-corrosion plate, so as to further strengthen the connection between each two spliced ​​anti-corrosion plates.

[0030] Furthermore, the anti-corrosion plate adopts light colors such as light green and fluorescent colors to achieve an anti-glare effect.

[0031] The present invention also provides a construction method of the above-mentioned concrete anti-collision wall, comprising the following steps: Step a: A groove is carved in the middle of the inclined surface of the concrete wall. The groove has a depth of 2 mm and a width of 2 mm. The groove extends horizontally and penetrates the entire concrete wall. Then, the distributed strain sensing system is placed in the groove. After ensuring that the distributed strain sensing system is in a taut state, the distributed strain sensing system is connected to the optical fiber demodulator. After confirming that the distributed strain sensing system is not powered off, the distributed strain sensing system is fixed in the groove and the entire groove is filled with epoxy resin. Step b: When installing the first spliced ​​anti-corrosion board, evenly apply epoxy resin on the vertical surface and inclined surface of the concrete wall, the width of the epoxy resin is 1 to 1.2m, and apply epoxy resin on the inner wall of the concrete wall water tank, the width of the application is 1 to 1.2m, and then fix the first spliced ​​anti-corrosion board along the first vertical surface, inclined surface and second vertical surface of the concrete wall and the inner wall of the water tank and press them firmly. After fixing, fix the first spliced ​​anti-corrosion board to the anti-collision wall through bolts at the first screw hole 25cm to 30cm away from both ends of the first spliced ​​anti-corrosion board; Step c: When installing the second and subsequent spliced ​​anti-corrosion boards, evenly apply epoxy resin on the vertical and inclined surfaces of the concrete wall with a width of 1 to 1.2 m. Apply epoxy resin on the inner wall of the concrete wall water tank with a width of 1 to 1.2 m. Then apply epoxy resin to the joint between the previous spliced ​​anti-corrosion board and the spliced ​​anti-corrosion board to be installed, and fix the inward C-shaped buckle of the spliced ​​anti-corrosion board to be installed with the outward C-shaped buckle of the previous spliced ​​anti-corrosion board. , then fit and fix the spliced ​​anti-corrosion plates to be installed along the first vertical surface, the inclined surface and the second vertical surface of the concrete wall and the inner wall of the water tank and compact them with force. After fixation, fix the spliced ​​anti-corrosion plates to the anti-collision wall through bolts at the first screw holes 25cm to 30cm away from both ends of the spliced ​​anti-corrosion plates. Finally, apply epoxy resin in the second screw holes at the connection of the two spliced ​​anti-corrosion plates, and further reinforce the connection of the two spliced ​​anti-corrosion plates with 6 bolts.

[0032] The present invention provides an anti-corrosion board as mentioned above, which is made of the following raw materials in percentage by mass: 30% of unsaturated resin, 15% of low shrinkage agent, 25% of glass fiber, 20% of calcium powder and 10% of other additives.

[0033] Furthermore, the other auxiliary agents include the following components in percentage by mass: 5% of a release agent, 3.5% of a release agent and 1.5% of an anti-aging agent.

[0034] Furthermore, the unsaturated resin is prepared by unsaturated dibasic acid (HOOC--CH=CHCH2-COOH), saturated dibasic acid (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 polycondensation at a temperature of 270-280°C. The unsaturated resin is the base material of the anti-corrosion board, which can bond other materials together to form a continuous overall structure. The unsaturated resin provides basic strength and toughness for the anti-corrosion board. The unsaturated bonds in its chemical structure can undergo cross-linking reactions during the curing process, giving the board better mechanical properties, such as hardness and impact resistance; at the same time, the unsaturated resin itself can block the external environment to a certain extent, and also contributes to the anti-corrosion performance.

[0035] Furthermore, 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 cracking of the board caused by shrinkage. The use of polyvinyl acetate in the present invention can effectively improve the dimensional stability of the anti-corrosion board, ensure the flatness and precision of the board, reduce the generation of internal stress, and thus improve the overall quality and service life of the board.

[0036] Furthermore, 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 the role of a skeleton in the matrix resin, which can significantly improve the mechanical properties of the anti-corrosion board such as tensile strength and bending strength, making it less likely to deform or damage when subjected to external forces. At the same time, the glass fiber can also prevent the penetration of corrosive media to a certain extent and improve the anti-corrosion performance.

[0037] Furthermore, the calcium powder is calcium carbonate. The calcium powder can increase the hardness and wear resistance of the anti-corrosion board, and because calcium carbonate itself has a certain chemical stability, it also helps to improve the chemical corrosion resistance of the board to a certain extent.

[0038] Furthermore, the release agent is any one or more of emulsified wax liquid, methyl silicone oil emulsion (aqueous emulsion whose main component is polydimethylsiloxane), and modified silicone oil emulsion. The release agent can ensure the smoothness and integrity of the surface of the anti-corrosion board, so that the board can be smoothly removed from the mold, and the surface of the board will not be damaged due to the demoulding process, which is conducive to improving the appearance quality of the product.

[0039] Furthermore, the acid and alkali resistant agent is any one of fatty acid ester and polyether modified silicone oil. The fatty acid ester or polyether modified silicone oil can form a protective film on the surface of the anticorrosive board, or react with the unsaturated resin matrix to change its chemical structure, so that the board has enhanced tolerance to acid and alkali media.

[0040] Furthermore, the fatty acid ester is a compound synthesized by esterification reaction of fatty acids and alcohols, such as any one or more of isopropyl palmitate, ethyl oleate, isopropyl myristate, butyl stearate, and the like.

[0041] Furthermore, the polyether-modified silicone oil is a substance comprising structural units such as a siloxane main chain and a polyether side chain.

[0042] Furthermore, the anti-aging agent is N-phenyl-aniline. The anti-aging agent can capture free radicals, prevent or slow down aging processes such as oxidation reactions, maintain the appearance and mechanical properties of the anti-corrosion board, and extend its service life.

[0043] Furthermore, according to the performance test of "Test Method for Chemical Resistance of Glass Fiber Reinforced Thermosetting Plastics" (GBT 3857-2017), the performance of the anti-corrosion board meets the following technical indicators: Impact toughness: ≥20KJ / ㎡; Volume resistance: 1.4×1013Ω; Compression strength: ≥100Mpa; Bending strength: ≥22Mpa; Flexural modulus: ≥1000Mpa; Flame retardant grade: Class B; Barcol hardness: ≥45HBa; Alkali resistance: 20% sodium hydroxide, 23°C, 48h, no obvious change in appearance; Acid resistance: 20% sulfuric acid, 23°C, 48h, no obvious change in appearance; Xenon lamp aging performance: (Method A, cycle 1,300h), no obvious change in appearance.

[0044] Furthermore, the method for preparing the anti-corrosion plate comprises the following steps: Step 1: Mix the unsaturated resin, low shrinkage agent, glass fiber and calcium powder according to the above mass ratio, and stir for 8 to 10 minutes to obtain an anti-corrosion board base material mixture; Step 2: On the basis of the anti-corrosion board base material mixture, a release agent, an acid and alkali resistant agent and an anti-aging agent are added according to the above mass ratio, and then stirred and allowed to stand for 10 to 15 minutes to eliminate bubbles caused by stirring, thereby obtaining an anti-corrosion board prefabricated mixture; Step 3: Use compression molding to place the prefabricated mixture of the anti-corrosion board between the upper and lower molds. After closing the molds, place the molds on a hydraulic forming table and press them for 25-45 minutes under a high temperature and high pressure environment of 350℃~400℃ and 10MPa~12MPa to solidify the prefabricated mixture of the anti-corrosion board and obtain a finished anti-corrosion board.

[0045] Compared with the prior art, the present invention has the following beneficial effects: (1) The concrete anti-corrosion wall of the present invention is overlapped and fixed by spliced ​​anti-corrosion plates. When each two spliced ​​anti-corrosion plates are connected to each other, a C-shaped buckle is used to overlap each other, and bolts and epoxy resin are used to reinforce the joints, which achieves complete water seepage prevention and enhances the anti-corrosion effect. At the same time, a concave plate structure is provided under the anti-corrosion plate, which fits and fixes with the water tank of the road surface itself, which can not only discharge the moisture of the concrete anti-corrosion wall in time, but also play an anti-corrosion effect.

[0046] (2) A distributed fiber optic monitoring system is installed inside the concrete crash barrier. On the basis of anti-corrosion, it can accurately monitor the strain of the crash barrier in real time and fully understand the health status of the crash barrier in real time. It provides strong technical support for technical personnel to detect and eliminate safety hazards in a timely manner, and significantly improves the overall performance and reliability of the crash barrier.

[0047] (3) The material of the anti-corrosion board makes full use of the advantages of unsaturated resin, such as light weight, high strength, good corrosion resistance and good processing performance, and takes advantage of the technical advantages of glass fiber, such as high tensile strength and good elasticity. On this basis, calcium powder is added to further reduce the cost and improve the processing properties of the anti-corrosion board material, such as rheology and viscosity. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 It is a schematic diagram of the overall structure of the concrete anti-collision wall of the present invention.

[0049] Figure 2 It is an overall cross-sectional view of the concrete anti-collision wall of the present invention.

[0050] Figure 3 A partial enlarged view of the distributed fiber optic monitoring system layout.

[0051] Figure 4 It is a partial enlarged view of the water tank part of the concrete crash barrier of the present invention.

[0052] Figure 5 This is a schematic diagram of the structure of a single spliced ​​anti-corrosion plate.

[0053] Figure 6 This is a schematic diagram of the connection between two spliced ​​anti-corrosion plates after overlapping.

[0054] Figure 7 This is the front view of the anti-corrosion plate.

[0055] Reference numerals: 1——Concrete wall; 2——Anti-corrosion plate; 3 – Distributed strain sensing system; 4 - sink; 5 – Level road surface; 6 – bolts; 7 – groove; 8——first screw hole; 9——The second screw hole. DETAILED DESCRIPTION

[0056] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention 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 make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0057] Preparation Example 1 of Anticorrosive Plate (1) Materials of anti-corrosion plates: It is made of the following raw materials in percentage by mass: 30% unsaturated resin, 15% low shrinkage agent, 25% glass fiber, 20% calcium powder and 10% other additives, among which: Unsaturated resin is made by mixing unsaturated dibasic acid (HOOC--CH=CHCH2-COOH), saturated dibasic acid (C n H 2n (COOH)2, n=2) and diols (CnH 2n+2 O2, n = 2) is a thermosetting resin formed by polycondensation at a temperature of 270-280°C; Low shrinkage agent, polyvinyl acetate; Glass fiber, silica; Calcium powder, calcium carbonate; And other additives, including Release agent, methyl silicone oil emulsion; Acid and alkali resistant agent, isopropyl myristate; Anti-aging agent, N-phenyl-aniline; (2) Specific preparation method of anti-corrosion plate: Step 1: Mix the unsaturated resin, low shrinkage agent, glass fiber and calcium powder according to the above mass ratio, and stir for 10 minutes to obtain an anti-corrosion board base material mixture; Step 2: On the basis of the anti-corrosion board base material mixture, a release agent, an acid and alkali resistant agent and an anti-aging agent are added according to the above mass ratio, and then the mixture is stirred at high speed and allowed to stand for 10 minutes to eliminate bubbles caused by stirring, thereby obtaining an anti-corrosion board prefabricated mixture; Step 3: Use compression molding to place the prefabricated mixture of the anti-corrosion board between the upper and lower molds. After closing the molds, place the molds on a hydraulic forming table and press them for 35 minutes under a high temperature and high pressure environment of 350℃~400℃ and 10MPa~12MPa to solidify the prefabricated mixture of the anti-corrosion board and obtain a finished anti-corrosion board.

[0058] Preparation Example 2 of Anticorrosive Plate (1) Materials of anti-corrosion plates: It is made of the following raw materials in percentage by mass: 30% unsaturated resin, 15% low shrinkage agent, 25% glass fiber, 20% calcium powder and 10% other additives, among which: Unsaturated resin is made by mixing unsaturated dibasic acid (HOOC--CH=CHCH2-COOH), saturated dibasic acid (C n H 2n (COOH)2, n=3) and diols (CnH 2n+2 O2, n = 3) is a thermosetting resin formed by polycondensation at a temperature of 270-280°C; Low shrinkage agent, polyvinyl acetate; Glass fiber, alumina; Calcium powder, calcium carbonate; And other additives, including Release agent, methyl silicone oil emulsion; Acid and alkali resistant agent, ethyl oleate; Anti-aging agent, N-phenyl-aniline; (2) Specific preparation method of anti-corrosion plate: Step 1: Mix the unsaturated resin, low shrinkage agent, glass fiber and calcium powder according to the above mass ratio, and stir for 10 minutes to obtain an anti-corrosion board base material mixture; Step 2: On the basis of the anti-corrosion board base material mixture, a release agent, an acid and alkali resistant agent and an anti-aging agent are added according to the above mass ratio, and then the mixture is stirred at high speed and allowed to stand for 12 minutes to eliminate bubbles caused by stirring, thereby obtaining an anti-corrosion board prefabricated mixture; Step 3: Use compression molding to place the prefabricated mixture of the anti-corrosion board between the upper and lower molds. After closing the molds, place the molds on a hydraulic forming table and press them for 35 minutes under a high temperature and high pressure environment of 350℃~400℃ and 10MPa~12MPa to solidify the prefabricated mixture of the anti-corrosion board and obtain a finished anti-corrosion board.

[0059] Preparation Example 3 of Anticorrosive Plate (1) Materials of anti-corrosion plates: It is made of the following raw materials in percentage by mass: 30% unsaturated resin, 15% low shrinkage agent, 25% glass fiber, 20% calcium powder and 10% other additives, among which: Unsaturated resin is made by mixing unsaturated dibasic acid (HOOC--CH=CHCH2-COOH), saturated dibasic acid (C n H 2n (COOH)2, n=4) and diols (CnH 2n+2 O2, n = 2) is a thermosetting resin formed by polycondensation at a temperature of 270-280°C; Low shrinkage agent, polyvinyl acetate; Glass fiber, magnesium oxide; Calcium powder, calcium carbonate; And other additives, including Release agent, emulsified wax; Acid and alkali resistant agent, isopropyl palmitate; Anti-aging agent, N-phenyl-aniline; (2) Specific preparation method of anti-corrosion plate: Step 1: Mix the unsaturated resin, low shrinkage agent, glass fiber and calcium powder according to the above mass ratio, and stir for 10 minutes to obtain an anti-corrosion board base material mixture; Step 2: On the basis of the anti-corrosion board base material mixture, a release agent, an acid and alkali resistant agent and an anti-aging agent are added according to the above mass ratio, and then the mixture is stirred at high speed and allowed to stand for 15 minutes to eliminate bubbles caused by stirring, thereby obtaining an anti-corrosion board prefabricated mixture; Step 3: Use compression molding to place the prefabricated mixture of the anti-corrosion board between the upper and lower molds. After closing the molds, place the molds on a hydraulic forming table and press them for 35 minutes under a high temperature and high pressure environment of 350℃~400℃ and 10MPa~12MPa to solidify the prefabricated mixture of the anti-corrosion board and obtain a finished anti-corrosion board.

[0060] Example A concrete anti-collision wall is provided, comprising a concrete wall 1 and an anti-corrosion plate 2 closely arranged on the side wall of the concrete wall 1, wherein the anti-corrosion plate 2 is an anti-corrosion plate made of any material prepared in Examples 1-3, wherein: The side wall of the concrete wall 1 includes an inclined surface, and a groove 7 is engraved at the center of the inclined surface. The groove 7 extends in the horizontal direction and penetrates the concrete wall 1, and is used to lay a distributed strain sensing system 3. The distributed strain sensing system 3 is a 2.0 mm high-transmission tight-sheathed distributed strain sensing optical cable produced by Suzhou Nanzhi Sensing Co., Ltd.; The anti-corrosion plate 2 has a longitudinal section shape consistent with the side wall structure of the concrete wall 1, so as to ensure that the anti-corrosion plate 2 can be closely attached to the side wall of the concrete wall 1; The anti-corrosion plate 2 includes a plurality of spliced ​​anti-corrosion plates, and every two spliced ​​anti-corrosion plates are fixedly connected by a C-shaped buckle bite, and are fastened by bolts 6 at the bite connection of the C-shaped buckle.

[0061] Furthermore, the inclination angle between the slope of the concrete wall 1 and the horizontal road surface 5 is 50-55°, which is adjusted according to the simulation data of the vehicle collision to ensure that the impact force can be effectively dispersed and the damage can be reduced during the collision.

[0062] Furthermore, the side wall of the concrete wall 1 includes 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 horizontal road surface. The vertical height of the lower end of the first vertical surface from the horizontal road surface is 26 cm, and the vertical height of the upper end of the second vertical surface from the horizontal road surface is 8 cm.

[0063] Furthermore, there is a water trough 4 with a depth of 5 cm and a width of 5 cm between the second vertical surface of the concrete wall 1 and the horizontal road surface adjacent to the second vertical surface, so as to collect and guide the accumulated water on the concrete crash barrier and the horizontal road surface, thereby reducing the risk of damage to the concrete crash barrier foundation structure due to the erosion of rainwater.

[0064] Furthermore, the concrete wall 1 is made of high-strength, impermeability-good concrete material, with a compressive strength of not less than C30 and a permeability grade of not less than P6. A certain proportion of microsilica powder and polypropylene fiber are added to the concrete. The microsilica powder can improve the density and strength of the concrete, and the polypropylene fiber can effectively inhibit the generation and development of concrete cracks.

[0065] Furthermore, reinforcing steel bar skeletons are arranged at intervals along the length and height directions inside the concrete wall 1. The reinforcing steel bar skeletons are welded from threaded steel bars with a diameter of not less than 10 mm, and the spacing between adjacent steel bar skeletons does not exceed 30 cm, so as to enhance the overall structural strength and impact resistance of the concrete wall 1.

[0066] Furthermore, the groove 7 has a depth of 1.5-2.5 mm, a width of 1.8-2.2 mm, and a quadrilateral cross section.

[0067] More specifically, the groove 7 has a depth of 2 mm and a width of 2 mm.

[0068] Furthermore, the inner wall of the groove 7 has a rough surface that has been polished to enhance the bonding force with the distributed strain sensing system 3 , thereby better fixing the distributed optical fiber monitoring system 3 .

[0069] Furthermore, a waterproof and breathable isolation layer is provided on the inner wall of the groove 7. The isolation layer is made of a polytetrafluoroethylene microporous membrane, which can prevent moisture accumulation from damaging the distributed strain sensing system 3, while allowing gas exchange to avoid the influence of air pressure changes on the sensing performance.

[0070] Furthermore, the distributed strain sensing system 3 is a high-transmission distributed strain sensing optical cable, which is encapsulated and protected by a polyurethane elastomer material. The high-transmission distributed strain sensing optical cable can accurately sense and measure the tiny strains generated by structures such as concrete crash barriers under the influence of external loads, temperature changes, self-deformation, etc.; by analyzing the changes in the transmission characteristics of the optical signal in the optical cable, the strain information is converted into measurable changes in optical signal parameters, such as wavelength drift, light intensity attenuation, etc., thereby achieving high-precision monitoring of the strain.

[0071] Furthermore, the high-transmission distributed strain sensing optical cable is used in combination with the Brillouin distributed fiber optic sensing technology. The Brillouin distributed fiber optic sensing technology utilizes the Brillouin scattering effect in the optical fiber for sensing, which can continuously monitor the strain changes along the optical fiber and enable the optical cable to perform high-precision strain monitoring over a long distance.

[0072] Furthermore, the high transmission distributed strain sensing optical cable is sealed in the groove 7 with epoxy resin. The optical cable is kept in a taut state in the groove 7 and connected to the optical fiber demodulator, and the entire groove 7 is also filled with epoxy resin to protect the optical cable.

[0073] Furthermore, the spliced ​​anti-corrosion plate is an integrally formed structure, which includes a first vertical plate, an inclined plate, a second vertical plate and a concave plate according to different angles with the horizontal road surface. Each plate is respectively adhered and fixed along the first vertical surface, the inclined surface and the second vertical surface of the concrete wall 1 and the inner wall of the water tank 4.

[0074] Furthermore, the spliced ​​anti-corrosion plate is fixedly connected to the concrete wall 1 by a combination of screw fixing and epoxy resin bonding.

[0075] Furthermore, the width of the spliced ​​anti-corrosion plate is 1 to 1.2 m, and the thickness is 1 cm. A plurality of first screw holes 8 are respectively arranged on the first vertical plate at 25 cm to 30 cm away from both ends thereof. The first vertical plate of the anti-corrosion plate is fixed to the first vertical surface of the concrete wall 1 by bolts, and at the same time, one side of the first vertical plate adjacent to the first vertical surface is reinforced by epoxy resin, so that the anti-corrosion plate 2 fits tightly to the concrete wall 1.

[0076] Furthermore, epoxy resin is used to adhere and fix the concave plate of the anti-corrosion plate 2 to the inner wall of the water tank 4, which can not only discharge the moisture of the horizontal road surface 5 in time, but also play an anti-corrosion effect.

[0077] Furthermore, every two spliced ​​anti-corrosion plates are provided with a C-shaped buckle structure at the connection, wherein the C-shaped buckle of one spliced ​​anti-corrosion plate is bent inward, and the C-shaped buckle of the other spliced ​​anti-corrosion plate is bent outward, so that when the two spliced ​​anti-corrosion plates are spliced, the two C-shaped buckles can bite each other to form a closed structure.

[0078] Furthermore, the C-shaped buckle and the spliced ​​anti-corrosion plate are an integrally formed structure.

[0079] Furthermore, the width of the C-shaped buckle accounts for 5% of the width of the spliced ​​anti-corrosion plate.

[0080] Furthermore, two second screw holes 9 are respectively provided at the top, middle and bottom of the connection between each two spliced ​​anti-corrosion plates. Each two second screw holes 9 at the same height from the horizontal road surface are symmetrically arranged along the center line of the connection. Two bolts are respectively passed through the inward C-shaped buckle of one spliced ​​anti-corrosion plate and the outward C-shaped buckle of the other spliced ​​anti-corrosion plate, so that the connection between each two spliced ​​anti-corrosion plates is further reinforced.

[0081] Furthermore, the anti-corrosion plate adopts light colors such as light green and fluorescent colors to achieve an anti-glare effect.

[0082] The construction method of the above concrete anti-collision wall comprises the following steps: Step a: A groove is carved in the middle of the inclined surface of the concrete wall. The groove has a depth of 2 mm and a width of 2 mm. The groove extends horizontally and penetrates the entire concrete wall. Then, the distributed strain sensing system is placed in the groove. After ensuring that the distributed strain sensing system is in a taut state, the distributed strain sensing system is connected to the optical fiber demodulator. After confirming that the distributed strain sensing system is not powered off, the distributed strain sensing system is fixed in the groove and the entire groove is filled with epoxy resin. Step b: When installing the first spliced ​​anti-corrosion board, evenly apply epoxy resin on the vertical and inclined surfaces of the concrete wall with a width of 1 to 1.2 m. Apply epoxy resin on the inner wall of the water tank of the concrete wall with a width of 1 to 1.2 m. Then, fit and fix the first spliced ​​anti-corrosion board along the first vertical surface, inclined surface, second vertical surface of the concrete wall and the inner wall of the water tank and press it hard. After fixation, fix the first spliced ​​anti-corrosion board to the anti-collision wall by bolting at the first screw hole 25 cm to 30 cm away from both ends of the first spliced ​​anti-corrosion board.

[0083] Step c: When installing the second and subsequent spliced ​​anti-corrosion panels, evenly apply epoxy resin on the vertical and inclined surfaces of the concrete wall with a width of 1 to 1.2 m, and apply epoxy resin on the inner wall of the concrete wall water tank with a width of 1 to 1.2 m. Then apply epoxy resin on the connection between the previous spliced ​​anti-corrosion panel and the spliced ​​anti-corrosion panel to be installed, and fix the inward C-shaped buckle of the spliced ​​anti-corrosion panel to be installed with the outward C-shaped buckle of the previous spliced ​​anti-corrosion panel. Then, fit and fix the spliced ​​anti-corrosion panel to be installed along the first vertical surface, inclined surface and second vertical surface of the concrete wall and the inner wall of the water tank and compact them with force. After fixation, fix the spliced ​​anti-corrosion panel to the anti-collision wall with bolts at the screw holes 25 cm to 30 cm away from both ends of the spliced ​​anti-corrosion panel. Finally, apply epoxy resin in the screw holes at the connection of the two spliced ​​anti-corrosion panels, and further reinforce the connection between the two spliced ​​anti-corrosion panels with 6 bolts.

[0084] The above are only preferred embodiments of the present invention and are not intended to limit the present invention in any other form. Any modifications or equivalent changes made based on the technical essence of the present invention still fall within the scope of protection required by the present invention.

Claims

1. A concrete anti-collision wall, characterized in that: It comprises a concrete wall (1) and an anti-corrosion plate (2) arranged closely on the side wall of the concrete wall (1). The side wall of the concrete wall (1) comprises an inclined surface, a groove (7) is engraved at the center of the inclined surface, and the groove (7) extends in a horizontal direction and passes through the concrete wall (1), and is used for arranging a distributed strain sensing system (3); The anti-corrosion plate (2) has a longitudinal section shape that is consistent with the side wall structure of the concrete wall (1), so as to ensure that the anti-corrosion plate (2) can be closely attached to the side wall of the concrete wall (1); The anti-corrosion plate (2) comprises a plurality of spliced ​​anti-corrosion plates, and every two spliced ​​anti-corrosion plates are fixedly connected by a C-shaped buckle bite, and are fastened by bolts (6) connected to the bite connection of the C-shaped buckle.

2. The concrete anti-collision wall according to claim 1, characterized in that: The side wall of the concrete wall (1) comprises a first vertical surface, a second vertical surface, and the inclined surface connecting the first vertical surface and the second vertical surface, wherein the first vertical surface and the second vertical surface are perpendicular to the horizontal road surface; a water trough (4) with a depth of 5 cm and a width of 5 cm is provided between the second vertical surface of the concrete wall (1) and the horizontal road surface adjacent to the second vertical surface, so as to collect and guide the accumulated water on the concrete crash barrier and the horizontal road surface, thereby reducing the risk of damage to the foundation structure of the concrete crash barrier due to the erosion of rainwater.

3. The concrete anti-collision wall according to claim 1 or 2, characterized in that: The groove (7) has a depth of 1.5-2.5 mm, a width of 1.8-2.2 mm, and a quadrilateral cross section.

4. The concrete anti-collision wall according to claim 1 or 2, characterized in that: The distributed strain sensing system (3) is a high-transmission distributed strain sensing optical cable, which is encapsulated and protected by a polyurethane elastomer material; the high-transmission distributed strain sensing optical cable is enclosed in the groove (7) with epoxy resin, the optical cable is kept in a taut state in the groove (7) and is connected to the optical fiber demodulator, and the entire groove (7) is also filled with epoxy resin to protect the optical cable.

5. The concrete anti-collision wall according to claim 1 or 2, characterized in that: The spliced ​​anti-corrosion plate is an integrally formed structure, and comprises a first vertical plate, an inclined plate, a second vertical plate and a concave plate according to different angles with the horizontal road surface, and each plate is respectively fitted and fixed along the first vertical surface of the concrete wall (1), the inclined surface and the second vertical surface, and the inner wall of the water tank (4).

6. The concrete anti-collision wall according to claim 1 or 2, characterized in that: A C-shaped buckle structure is provided at the connection between every two spliced ​​anti-corrosion plates, wherein the C-shaped buckle of one spliced ​​anti-corrosion plate is bent inwards, and the C-shaped buckle of the other spliced ​​anti-corrosion plate is bent outwards, so that when the two spliced ​​anti-corrosion plates are spliced, the two C-shaped buckles can bite each other to form a closed structure.

7. The concrete anti-collision wall according to claim 1 or 2, characterized in that: Two second screw holes (9) are respectively provided at the top, middle and bottom of the connection between each two spliced ​​anti-corrosion plates. Each two second screw holes (9) at the same height from the horizontal road surface are symmetrically arranged along the center line of the connection. Two bolts are respectively passed through the inward C-shaped buckle of one spliced ​​anti-corrosion plate and the outward C-shaped buckle of the other spliced ​​anti-corrosion plate, so that the connection between each two spliced ​​anti-corrosion plates is further reinforced.

8. A construction method for the concrete anti-collision wall according to any one of claims 1 to 7, characterized in that: The steps include: Step a: a groove (7) is carved in the middle of the inclined surface of the concrete wall (1), wherein the groove has a depth of 2 mm and a width of 2 mm, and extends in the horizontal direction and penetrates the entire concrete wall (1); then the distributed strain sensing system (3) is placed in the groove, and after ensuring that the distributed strain sensing system (3) is in a taut state, the distributed strain sensing system (3) is connected to the optical fiber demodulator, and after confirming that the distributed strain sensing system (3) is not powered off, the distributed strain sensing system (3) is fixed in the groove (7), and the entire groove (7) is filled with epoxy resin; Step b: when installing the first spliced ​​anti-corrosion plate, epoxy resin is evenly applied on the vertical surface and inclined surface of the concrete wall (1), and the width of the epoxy resin applied is 1 to 1.2 m. Epoxy resin is applied on the inner wall of the water tank of the concrete wall (1), and the width of the applied epoxy resin is 1 to 1.2 m. Then, the first spliced ​​anti-corrosion plate is fixed along the first vertical surface, the inclined surface, the second vertical surface of the concrete wall (1) and the inner wall of the water tank (7) and pressed firmly. After fixing, the first spliced ​​anti-corrosion plate is fixed to the anti-collision wall (1) at the first screw hole 25 cm to 30 cm away from both ends of the first spliced ​​anti-corrosion plate by bolts (6); Step c: When installing the second and subsequent spliced ​​anti-corrosion panels, evenly apply epoxy resin on the vertical surface and the inclined surface of the concrete wall (1), and the width of the epoxy resin applied is 1 to 1.2 m. Apply epoxy resin on the inner wall of the water tank of the concrete wall (1), and the width of the epoxy resin applied is 1 to 1.2 m. Then, apply epoxy resin to the connection between the previous spliced ​​anti-corrosion panel and the spliced ​​anti-corrosion panel to be installed, and fix the inward C-shaped buckle of the spliced ​​anti-corrosion panel to be installed with the outward C-shaped buckle of the previous spliced ​​anti-corrosion panel, and then The spliced ​​anti-corrosion plates to be installed are fixed along the first vertical surface, the inclined surface, the second vertical surface and the inner wall of the water tank (7) and compacted with force. After being fixed, the spliced ​​anti-corrosion plates are fixed to the anti-collision wall (1) through bolts (6) at the first screw holes 25 cm to 30 cm away from both ends of the spliced ​​anti-corrosion plates. Finally, epoxy resin is applied to the second screw holes at the connection of the two spliced ​​anti-corrosion plates, and the connection of the two spliced ​​anti-corrosion plates is further reinforced through 6 bolts (6).

9. An anti-corrosion board for a concrete anti-collision wall according to any one of claims 1 to 7, characterized in that: The anti-corrosion board is made of the following raw materials in percentage by mass: 30% unsaturated resin, 15% low shrinkage agent, 25% glass fiber, 20% calcium powder and 10% other additives; The unsaturated resin is a thermosetting resin obtained by polycondensation of unsaturated dibasic acid, saturated dibasic acid and diol at a temperature of 270-280°C. The unsaturated dibasic acid is HOOC--CH=CHCH2-COOH, The saturated dibasic acid is C n H 2n (COOH)2, where n = 0, 1, 2, 3 or 4, The diol is CnH 2n+2 O2, where n = 1, 2 or 3; The low shrinkage agent is polyvinyl acetate; 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).

10. A method for preparing the anti-corrosion plate according to claim 9, characterized in that: The steps include: Step 1: Mix the unsaturated resin, low shrinkage agent, glass fiber and calcium powder according to the above mass ratio, and stir for 8 to 10 minutes to obtain an anti-corrosion board base material mixture; Step 2: On the basis of the anti-corrosion board base material mixture, a release agent, an acid and alkali resistant agent and an anti-aging agent are added according to the above mass ratio, and then stirred and allowed to stand for 10 to 15 minutes to eliminate bubbles caused by stirring, thereby obtaining an anti-corrosion board prefabricated mixture; Step 3: Use compression molding to place the prefabricated mixture of the anti-corrosion board between the upper and lower molds. After closing the molds, place the molds on a hydraulic forming table and press them for 25-45 minutes under a high temperature and high pressure environment of 350℃~400℃ and 10MPa~12MPa to solidify the prefabricated mixture of the anti-corrosion board and obtain a finished anti-corrosion board.

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